THE STATISTICS OF LARGE EARTHQUAKE

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Jan 24, 1970 - This work was partly financed by the Greek Ministry of Coordination, under grant no. .... problems in seismology which most urgently require answers. .... The present century is the only available period with data of sufficient ..... paper is a rectangular grid where the observed variate x is plotted as ordinate ...
THE STATISTICS OF LARGE EARTHQUAKE MAGNITUDE AND AN EVALUATION OF GREEK SEISMICITY

by

K.C. Makropoulos (B.Sc., Univ. of Athens)

Thesis presented for the degree of Doctor of Philosophy of the University of Edinburgh in the Faculty of Science

1978

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ABSTRACT

The problem of the upper bound to earthquake magnitude occurrence is examined.

It is demonstrated using simple frequency-magnitude and

energy-magnitude laws, that it is possible to include an upper bound as an unknown parameter, and to calculate its value both analytically and graphically.

It is shown that a finite upper bound to earthquake magnitude

is necessary to preserve a finite rate of energy release.

This upper bound

is expressed in terms of the mean annual release of energy and the parameter b of the frequency-magnitude law. The third type asymptotic distribution of extreme values of Gumbel, which includes the upper bound as a parameter, is then determined using Marquardt's algorithm.

The methods of Extreme-Values and strain energy

release are then analytically related and both methods tested on the high seismicity of the circum-Pacific belt.

Uncertainties on the extreme value

parameters and related predictions are obtained using an error matrix, and uncertainties on the parameters from strain energy release are also determined.

Both methods give similar results and are applicable to the esti-

mation of seismic risk. These methods are then applied to evaluate Greek seismicity and seismic risk.

Greek earthquakes are relocated and magnitudes determined

to produce a homogeneous catalogue using mainly instrumental data since 1901.

Tectonic models of Greece are examined using the new hypocentres.

Seismic risk maps are presented and these contour maps show the maximum expected earthquake magnitudes and accelerations in the next T years at stated probability levels.

111

ACKNOWLEDGEMENTS

I would like to express my sincere thanks to Professor A G Galanopoulos and Professor J Drakopoulos for their encouragement and advice to start this work, and for allowing me leave of absence from Athens University to study in Edinburgh. I am grateful to Professor K M Creer, head of the Geophysics Department (University of Edinburgh) and Dr P L Wilimore, head of the Global Seismology Unit (Institute of Geological Sciences), for accepting me to Edinburgh and allowing me full use of their facilities for my project.

I am specially

indebted to the Global Seismology Unit for having provided me with all possible assistance and support throughout my work. I am very grateful to Dr P W Burton who supervised me during the course of this work.

Without his continual guidance, criticism, encouragement

and patience, especially during those dark days when nothing would work, this thesis would never have been completed. supervisor.

I was very lucky to have him as

He was for me a good friend and I am thankful for his invaluable

help throughout this work. I would like to express my gratitude to Dr P L Wilimore and Dr S Crainpin for their advice and constant assistance. Many thanks are also due to all other members of the Global Seismology Unit who helped me in one way or another, in particular I thank R W McGonigle, R B Jones, G Neilson and D Booth who helped me with various discussions and advice on computing. My student colleague M Assumpcao deserves special thanks for the useful discussions and the enjoyable time I have had in the past three years. My special thanks are also due to Mrs G Hall for typing the thesis. This work was partly financed by the Greek Ministry of Coordination, under grant no. 627/32213.

The University of Athens also financially supported

this work. iv

CONTENTS Pages ill

ABSTRACT

iv

ACKNOWLEDGEMENTS

1

Introduction

CHAPTER I I

General statement of problem Specific problems and research goals

4

Review of statistical models

6

2.1

Introduction

6

2.2

Statistical models using the whole process

6

2.2.1

Occurrence models

6

2.2.2

Magnitude models

10

2.2.3

Attenuution model

II

2.3

Extreme-Value theory fitting, using the part process

12

2.3.1

The three asymptotic distributions

15

2.3.2

Mathematical meaning of the parameters

16

2.3.3

Physical meaning of the parameters

17

2.3.4

Probability papers.

2.3.5

Estimation of the parameters

20

2.3.6

Useful relations for forecasting procedure

23

2.3.7

Applications of the Extreme-Value theory to seismic

1.2 CHAPTER II

Plotting positions

17

risk problems

26

Summary

28

The upper bound for earthquake magnitude

29

3.1

Statement of the problem

29

3.2

Energy release and maximum magnitude earthquake

30

3.2.1

Mathematical consideration

30

3.2.2

Graphical methods of estimating M

3.2.3

Testing the two methods

2.4 CHAPTER III

AA

and M3

34 35

3.2.4 Results and discussion

36

3.3

40

CHAPTER IV

Summary Third type asymptotic distribution of Gumbel and Strain energy release relations

42

4.1

Introduction

42

4.1.1

Uncertainties - weights

42

4.1.2

Relations between parameters of strain energy release and the third type asymptote

42

4.1.3

Testing region

43

4.2

Estimation of the parameters

43

4.2.1

Non-linear least-squares methods

43

4.2.2

The Marquardt (1963) algorithm

45

4.2.3

Computations

48

4.3

Prediction uncertainties

48

4.4

Energy release and the third type asymptotic distribution

50

4.4.1

The mode

50

4.4.2

The meuti annual energy release

50

4.4.3

The upper limit

54

4.5

Testing the third type asymptotic distribution method

54

4.5.1

Data

54

4.5.2

Data treatment

54

4.5.3

Results and discussion

57

4.6

Comparing the results from energy release and third type asymptotic distribution methods

4.7 CHAPTER V

62

Conclusions An earthquake catalogue for the area of Greece 42.529 N33 , E19 since 1901

vi

67

5.1

Introduction

67

5.2

Previous work in Greek earthquake cataloguing

67

5.3

The ISS epicentres:

71

5.4

Data sources

72

5.4.1

Relocation

72

5.4.2

Magnitude

73

5.5

Earthquake relocation procedure

74

5.5.1

Methods and computer programs chosen for relocation

74

5.5.2

Procedure used

74

5.6

Magnitude determination

78

5.6.1

Magnitude scale chosen

78

5.6.2

Magnitude determination procedure

79

5.7

Completeness of the catalogue

82

5.7.1

Temporal plot of grouped events

82

5.7.2

Analysis of sample completeness

84

5.8

Comparing the results

88

5.9

Summary

90

Greek tectonics and seismicity

93

6.1

Introduction

93

6.2

Morphologic, geologic and geophysic features of the

CHAPTER VI

reasons for inaccuracies

93

area 6.3

Principle tectonic models for Greece and the adjacent areas

95

6.4

Spatial distribution of the earthquakes

99

6.4.1

Shallow earthquakes (h < 60km)

99

6.4.2

Intermediate earthquakes (h - 60km)

100

6.5

Isodepth maps from radial vertical cross—sections

102

6.5.1

Procedure

102

6.5.2

Results and discussion

103

vii

Summary

106

Greek seismic risk evaluation

108

7.1

Introduction

108

7.2

Data and cities for seismic risk estimation

109

7.3

Seismic risk based on the magnitude distribution

110

7.3.1

Comparison of the methods applied

110

7.3.2

Seismic risk evaluation - magnitude

111

7.4

Seismic risk based on peak acceleration of ground

6.6 CHAPTER VII

motion

114

7.4.1

Choosing the acceleration-distance formula

114

7.4.2

Method used to fit the maximum acceleration data

115

7.4.3

Procedure used to evaluate the seismic risk in T years at a given probability level

115

7.4.4

Seismic risk evaluation - acceleration

117

7.5

Spatial distribution of seismic risk in Greece

117

7.5.1

Contour maps of seismic risk - Procedure used

117

7.5.2

Results and discussion

118

7.6

Summary

122

CHAPTER VIII

Summary and final conclusions

125

APPENDIX A

Computer program listing

131

Risk Analysis Program (RAP)

132

Earthquake catalogue for Greece since 1901

147

Al APPENDIX B

182

REFERENCES

viii

CHAPTER I INTRODUCTION

As a result of increasingly complex industrial, commercial and residential developments, which cause centres of population to spread in ever widening circles, reliable estimations of seismic risk and seismic hazard, and developments of means of mapping them, are among the research problems in seismology which most urgently require answers. Definition of seismic risk as "the probability of occurrence of an earthquake in the future" (Lomnitz, 1974), implies a degree of future uncertainty.

Hence principles of probabilistic forecasting and decision

making are essential in any seismic risk analysis.

Models of seismic risk

usually consist of: empirical formulae based on available macroseismic data, statistical distribution laws for earthquake occurrence in time and magnitude, and attenuation laws describing the decay of seismic ground motion with focal distance.

1.1

General statement of problem The distribution of earthquake magnitudes in time and in size is

generally investigated by:

1) ii)

Using the whole available data - whole process. Using only the extreme value magnitudes - part process.

When models of the first category are applied to the experimental data, like the linear frequency-magnitude model of Gutenberg and Richter (1944), it becomes clear that they do not represent the real process for the large earthquakes.

Most of the proposed alternative expressions such

as the quadratic or truncated frequency-magnitude formulae (Mevz and Cornell,

1973, Cornell and Vaiimarcke, 1969) do not recognize the inescapable existence of an upper bound to the magnitude that can be generated in a region (Esteva, 1976). To implement earthquake-resistant design codes, it is usually necessary to know the maximum dynamic load to which a structure might be subject during its design life, or alternatively, the most probable return period of a specified design load.

The inclusion of an upper bound to earthquake magnitude

as an unknown parameter in a statistical model leads to more reliable estimates, especially for large earthquakes, because it is closer to the real process than that represented by the unlimited or truncated models. One of the objectives of this study is to investigate the regional upper bound for earthquake magnitude.

This is first attempted by using the

strain energy release in the region, calculated from the linear energymagnitude law, combined with analytic expressions for the upper bound to magnitude. In all the statistical models which use the whole process, inclusion of low magnitudes, which usually are incomplete and inhomogeneous, can bias the estimation of the prediction parameters.

On the other hand, in earth-

quake engineering applications, the need to consider extreme value distributions separately from the statistics of the whole process is of primary importance.

Thus, another prime objective of this study is to investigate

the usefulness of the distribution of Extreme-Values, which Cumbel (1966) has called the third type asymptotic distribution of extremes, for estimating the seismic risk and return periods of largest earthquakes.

This type of

distribution is chosen because it holds for initial distributions which are limited towards the largest values, and it contains the upper bound of the distribution as an unknown parameter,

2

The theory of Extreme-Value statistics is formulated under the assumptions:

the prevailing conditions are valid in the future and, the observed extreme values are independent of each other,

For the case of earthquake occurrence, our experience shows that earthquakes do not occur at the same level of magnitude and frequency all over the world. boundaries.

Practically 99% of all earthquakes occur along plate

Less than 3% of the earth's seismic energy release occurs

on the midoceanic rises or in the interior of plates (Lomnitz, 1974). Although aftershocks following large earthquakes are the most outstanding example of dependent events, Gumbel (1966) suggests that the influence of interdependence may vanish for largest values of a variate. Lomnitz (1966) points out that large earthquakes are indeed characterized by a high degree of randomness and independence in time. It is then reasonable to assume for a specific region and sampling period that the behaviour of the largest earthquakes will usually be similar to that of the near past; although the distribution will vary over geological epochs.

Consequently the theory of Extreme-Value statistics can

be applied to establish a prediction procedure for the largest earthquake magnitude of the next n years, by using the past N years' earthquake data in a given region. These two objectives form the first part of this thesis. In the second part, the objective is to evaluate the seismicity and seismic risk of Greece, using the methods already developed, which by then will be seen to give reliable estimates of the future seismic activity of a region.

The evaluation is obtained by estimating both the return periods

or specified magnitudes and also the expected magnitudes and accelerations within a period of time, all at a given probability level.

3

The results

are finally presented by mapping the geographic variation of earthquake risk in terms of maximum magnitude earthquakes and maximum ground motion accelerations expected to occur in the next T years. 1.2

Specific problems and research goals In any seismic risk analysis estimation of the uncertainties in the

predictions is a vital factor for the final judgement of the results.

A

specific goal is then to develop a technique to compute the errors on the parameters of the third type asymptotic distribution, and on all related predictions, using an error matrix.

A second goal is to explore any physical

meaning of these parameters by linking them with the physical release of strain energy.

This is attempted by relating physical quantities such as

mean annual energy release, derived from the linear frequency-magnitude and energy-magnitude laws, with the same quantities obtained using the parameters of the third type asymptote.

The strain energy release and the third type

asymptotic distribution methods are then tested on the seismicity of the circum-Pacific belt, and then applied to the seismicity of Greece. Seismically, Greece is one of the most active countries in the world and the most active country in Europe.

About 3 to 4 of the seismic energy

release in the world is contributed by Europe, and half of this by Greece (Galanopoulos, 1971a). The long documented seismic history of Greece reports many catastrophes due to earthquakes (Galanopoulos 1961, Lomnitz 1974).

How-

ever, demands of statistical seismology for data which is as accurate and homogeneous as possible, implies that instrumentally recorded events are preferable.

The present century is the only available period with data of

sufficient reliability for our purposes.

Even so, because the worldwide

density of stations has increased markedly from decade to decade, the completeness of a sample of earthquake data is strongly dependent not only on the geographic area but also on the particular time interval covered.

4

In

order to achieve a more accurate picture of seismic risk for Greece, an important aspect of this study must be the preparation of an homogeneous earthquake catalogue by relocating all the events for which there is sufficient data.

For this purpose all earthquakes for the period 1917-1963

are selected from International and Greek sources and the hypocentral parameters will be recalculated, and the completeness of the data tested. The calculation of seismic risk, either in terms of strain energy release or acceleration, velocity etc. depends critically on the magnitude of the earthquakes considered and so homogeneous magnitudes are necessary. This requirement can be best fulfilled if the magnitudes are determined from the same instruments which ideally should have been operating all the time. Thus a complementary aspect of relocation is the calculation of magnitudes for every single earthquake which appears in the new catalogue. Uppsala Wiechert amplitudes from Uppsala seismological bulletins will be used to determine surface-wave magnitude up to 1954, whereas from 1955 onwards, the Uppsala and Kiruna amplitudes from modern instruments will be used. Thus, the sample of extremes that eventually forms the final basis for statistical analysis of the earthquake risk in Greece consists of the set of annual maxima of magnitudes and accelerations which are drawn as required from the new catalogue.

The final product will be detailed maps

and evaluations of seismic risk in Greece.

CHAPTER II REVIEW OF STATISTICAL MODELS

2.1

Introduction The earthquake phenomenon has been analysed for many years in

terms of specific characteristics such as its location, magnitude and focal depth.

The set of these characteristics of historical earthquakes

is called the "seismicity" of the region.

With the development of the

hypothesis of sea-floor spreading, however, the earthquake phenomenon and seismic activity in general began tc be regarded as a global process. Since then, the generation and propagation of seismic energy from source to the site are among the earthquake's diverse seismic properties which have been studied with rising interest. The occurrence of earthquakes in space and time falls under the general category of stochastic processes, that is, mathematical models of a given physical system that changes in accordance with the laws of probability (Lomnitz, 1974) .

Hence, statistical models have to be used,

and the validity of the model checked by its concordance with past observations. The aim of this chapter is to review some of the existing statistical models of the occurrence of earthquakes in time, magnitude and attenuation which includes acceleration, velocity and displacement. Emphasis is given to the Extreme-Value models, of which the third-type asymptotic distribution will be one of the main subjects of this study.

2.2

Statistical models using the whole process

2.2.1 Occurrence models a)

Simple Poisson model Let us consider the earthquake as an event which occurs along

a time axis.

This model assumes that one event in a given magnitude

-

range and in any given volume of the earth crust is equally likely to be found in any unit time interval along the time axis, and it is independent of any other event.

The probability of finding n

events in time t, if the mean rate of occurrence k is known, follows the Poisson probability law: -kt P(n,kt)e (kt)n n!

(2-1)

The mean and the variance of the Poisson distribution are both equal to the mean rate k. According to the Poisson model, the probability of observing no events within a time t, that is of finding a time larger than t without events, is: P(O,t)=ekt

(2-2)

Then the probability of finding a time equal or less than t with no events is: P(t)=l_ekt,O0, O0

(2-48)

3w2 3w3u 3u2 3(1/k)2 30(1/k) 3u3(1/k) w>o, o 5.

This catalogue contains a list of earthquakes since It is a compilation from his previous work (1960, 1963),

Ka'nik (1969), Gutenberg and Richter (1954), UNS and ATB, and since 1961 all earthquake parameters, except magnitude, are those calculated by ISS and the International Seismological Centre (ISC).

All magnitudes are

averaged surface wave magnitudes, determined using macro and microseismic information. It is apparent that none of the existing catalogues for Greece as a whole fulfil the important objective of homogeneity either for locations or for magnitudes.

All of them have inconsistencies because they are

compiled from many different sources.

Furthermore, the ISS locations are

influenced by the period in which the events were recorded and by changes in travel-time models used (see below), as is apparent from the work of Crampin and U9er (1975) for the Marmara area and Ucer et al. (1975) for the results of ATB.

5.3

The ISS epicentres: reasons for inaccuracies The only Bulletins which tabulate phase arrival and epicentres from

1917 until 1963 are those of the International Seismological Summary. ISS used different travel-time tables during the whole period (TurnerZoppritz from 1917 until 1929, Jeffreys-Bullen revised tables from

71

1930-1936, and since then Jeffreys-Bullen with ellipticity corrections). Epicentres were determined by hand-operated mechanical calculators, except for the last seven years when an electronic computer was used, and although the full scale least-squares procedure used was similar to the computer procedure used today, it frequently adopted old locations to fresh sets of arrivals to reduce the prodigious amount of work (Crainpin and User, 1975). The lack of adequate travel-time tables for the whole period and the technique of adopting old locations, leads to inaccuracies in ISS epicentre determinations.

Even for recent events (ie since 1954) the

use of the world-wide travel-time tables, without station adjustments for the particular region, (acceptable when making international routine calculations), makes the ISS locations less precise than is possible. These inaccuracies can be allowed for by relocating using consistent travel times, coupled with station adjustments to account for station, travel-time, network and source effects.

An attempt to eliminate these

inaccuracies is made in this study.

5.4

Data sources

5.4.1 Relocation Because both SPEEDY and JED programs (Douglas, Young and Lilwall, 1974) which are used for the relocation procedure, are designed for first arrival readings (ie P-waves), the following data sources are used:

For the period 1913-1917, the monthly bulletins of the British Association for the Advancement of Science. For 1918-1963, the bulletins of the ISS. For 1964-1976, the bulletins of the ISC.

Arrival data were collected for those earthquakes with epicentres not only within Greek territory but slightly beyond.

72

The area of investigation is limited to latitudes 330N to 42.5°N 0

0

0

and longitudes 190E to 29 E north of the 38 N parallel and 30 E south of it, in order to cover the Dodecanese Islands. An attempt to recalculate events prior to 1917 using source (1) was not successful because of the poor quality and quantity of the readings reported as first arrivals. limited in number.

The stations were too widely spread and too

For the period 1964-1975, where data from source (iii)

is available, several test recomputations showed that the shift between the new and old location was on an average less than 10 km to within the 95% confidence limits.

Furthermore ISC gives standard deviations in origin

time, coordinates and focal depth determinations, which indicate the quality of the solution given.

Therefore no recomputations for this period are

made. Earthquakes for the period 1917-1963 inclusive are relocated here, using first arrival data from source (ii) exclusively.

For the 605 earth-

quakes which are relocated, 45,000 first arrivals (cards) were punched and used as input to both programs. 5.4.2 Magnitude In order to determine the surface-wave magnitude, M (see 5.7) the following data sources are used:

For the period 1908-1959, the annual bulletins of the Seismological Institute at Uppsala (SIU) for readings of Uppsala station (UPP). For 1951-1955, the annual bulletins of SIU for readings of Kiruna station (KIR). For 1956-1963, the monthly bulletins of SIU for all the Swedish network. For 1901-1970, the UNS catalogue. For 1964-1976, the ISC magnitude determinations. For 1976-1978, the United States National Earthquake Information Centre (NEIC) magnitude determinations. 73

5.5

Earthquake-relocation procedure Earthquakes are today generally located by one of two methods.

The first method is called the "single-event" or Geiger's method (Geiger, 1910); the second is the Joint Epicentre Determination (JED) method (Douglas, 1967). 5.5.1 Methods and computer programs chosen for relocation The computer programs SPEEDY and JED written by Douglas, Young and Lilwall (1974) are used to relocate the source parameters of Greek earthquakes.

Both programs are designed to accept first-arrival readings only,

and a set of travel-time tables.

In this study the ISS first arrivals and

Herrin's "68" travel-timetables are the main input data to both programs. SPEEDY is a "single-event" based program, whereas JED is a "group-event" based program.

A detailed description of the two methods can be found

in Lilwall (1969). Although JED is a more accurate method of epicentre determination than "single-event" methods, it is a very costly process in terms of computing time.

So JED is used here as the first step of the relocation

procedure to determine a set of station adjustments which are then retained. Thus, having a set of station adjustments derived from a group of major and well-recorded events using JED, the "single-event" based program SPEEDY can then be used, and these adjustments applied to the travel-time of other events. 5.5.2 Procedure used Applying station adjustments to travel-times in a "single-event" location, assumes that the corrections for a particular station are constant for all epicentres.

This is not necessarily the case for the

large area of Greece, which has a very complicated tectonic structure. The whole area was initially divided into three regions, but not divided in time:

74

Region A: Western Greece (west of 220E), with mainly shallow earthquakes. Region B: Southern Greece (south of 38°N), with the majority of intermediate earthquakes. Region C: Central and Northern Greece (the remaining part of Greece).

For Region A,19 well-recorded events (minimum number of stations 65, average number 121) were relocated using SPEEDY.

This facilitated the

selection of.a master event, which was restrained in a subsequent JED relocation of the same 19 events.

A set of station adjustments, corres-

ponding to the earthquakes of region A were obtained for 260 stations which had recorded more than 5 events.

These adjustments were subsequently,

used in individual SPEEDY relocations of the 19 events, including the previous master event.

This resulted in a new slightly changed position

for the master event (in all cases the shift was less than 5 km).

The

master event was then restrained at its new position and a final set of adjustments for the region determined by JED.

This procedure was repeated

for the other two regions. Before applying station adjustments in all subsequent relocations, the effectiveness of these "terms" in the precision of the final solution was checked.

This check was made using the latest and presumably more

accurate set of data from 1957 until 1963. As a measure of calculated precision the 95% confidence area around the epicentre has been chosen (Flinn, 1965).

The 202 events of this

period were relocated using SPEEDY both with and without station adjustments. Table 5-1 tabulates the results and shows that 174 of the total 202 events (86.1%), relocated using station adjustments, have smaller 95% confidence areas than those to which adjustments were not applied.

The 17.8%

overall average improvement is surprisingly high considering the quality

75

of the data set used.

It is expected that as the quality of first

arrivals increases, and the number of stations omitted because of bad readings decreases, the application of station adjustments should improve the precision and accuracy of epicentre parameters, although the difference in confidence areas should decrease.

In fact, the 28 cases of larger

confidence areas are almost all associated with poor quality first arrivals. The application of station adjustments results in some stations which have been truncated in the first solution being included in later solutions, if these stations correspond to poor quality first arrivals the confidence area may increase; but because of the larger number of stations, the solution will probably be less subject to station network bias.

Table S-I Contribution of station adjustments into final earthquake location

Region

No of events

No of improved cases (A

+t+

+4.

+

*,

++

+ ++

-

+ +

+

+ + 4 ++ 4 +

+ +4. I

+

t+

. + + +

:+

+

+

+.*. +

:

+4• +

+ + + + L

991098

00,990

aOth

u2

st

rwi

12li

N

LAre.ø 142

g•

++

+

+ +

4 +4.

+++

+

*— 4+ asvs

aaf

Fig 5-6 Mislocation errors: shift in distance (km) versus change in azimuth (degr.) for the relocated events compared to the ISS locations.

used, it is concluded that there are no significant differences between ISC locations, calculated with Jeffreys-Bullen travel-time tables, and their locations. It seems reasonable to conclude that a significant part of the 17 km shift in position found for the period since 1956 is due to the station adjustments applied to the first arrival data by the JED method.

In fact,

for the 202 earthquakes of this period which are located using SPEEDY, with and without station adjustments, the changes in relative position (ie, distance between the two positions of the same event with and without station adjustments) have an average shift of 8.6 km. ep

The results of these tests show that the relocated /centres are significantly different from those of ISS with the average shift decreasing from decade to decade since 1917.

Even for the most recent period of in-

vestigation since 1956 there is still a significant change in position, with an average shift of 17 km.

5.9

Summary Because none of the existing earthquake catalogues for Greece (N5 33

E 29 ) fulfil the demands of modern seismology for accuracy, homogeneity and 19 completeness, this chapter has attempted to reduce these inaccuracies as far as available data permits. Considering the data available for recalculation of source parameters, the catalogue presented here contains: Earthquakes for which all parameters are calculated using the JED method (Period: 1917-1963). Earthquakes for which magnitudes are determined using the Swedish network ground amplitude records (Period: 1908-1977). Earthquakes adopted from the UNS catalogue for all parameters, because neither first arrival nor ground amplitude data is available (Period: 1901-1907).

all

iv)

Earthquakes for which magnitude determinations are possible but not recalculations of the other parameters because of limited number of arrivals.

For these earthquakes, parameters other than magnitude

are adopted from other sources after special investigation for as much macroseismic information as possible (Period: 1908-1977).

The last two cases are included in the catalogue for completeness.

Although

the accuracy of the adopted earthquakes is not known, the criterion for adoption using macroseismic information eliminates large errors in location. For all these earthquakes magnitudes are determined using the same procedure as for the rest of the data sample, and so magnitude homogeneity is retained. When Stepp's test of completeness is applied, the results show that only earthquakes with magnitude greater than 6.3 are completely reported during the whole period of investigation (1901-1977), whereas earthquakes with a maximum magnitude M4.7 are completely reported only during the most recent 15 years (1963-1977).

The time required for stable mean recurrence

rate is found to be 40-50 years of homogeneous observations for magnitude greater than 6.3, whereas for earthquakes with magnitude between 4.2 and 4.7, only 5 to 10 years of homogeneous observations are sufficient to establish a stable mean recurrence rate. The JED method chosen to relocate the events has the advantage of using master events, which coupled with its capability of detecting source, travel-times, network and station bias and the facility to combine these into a single tvtermY! (ie station adjustment), guarantees the highest possible accuracy for the relocated earthquake epicentres.

The consistent treatment

of all available data, particularly magnitude determinations, ensures a high degree of homogeneity for the whole period of investigation. Completeness of the catalogue is limited by data availability, but

11

using the results of Table 5-4, it is possible to determine intervals over which earthquakes in different magnitude classes are completely reported. Finally, because the accuracy of the following seismic risk investigation is related to the earthquake catalogue used, comparisons between ISS original locations and those of the present catalogue are worthwhile. The comparison tests show that ISS locations are severely biased. These large average total shifts imply that it is not possible to describe the detailed seismicity of Greece by just using the ISS data sample for the whole period.

This earthquake catalogue for Greece has a high degree of

homogeneity, accuracy and completeness, and permits more detailed seismotectonic studies to be made on the basis of a long, instrumentally recorded data sample. In the next chapter existing tectonic models will be tested to see if they are in accord with the recalculated parameters of the earthquakes. This will then be followed by the application of the statistical techniques of the first part of this thesis to the new earthquake catalogue to estimate seismic risk for Greece.

92

CHAPTER VI GREEK TECTONICS AND SEISMICITY

6.1

Introduction The spatial distribution of earthquakes in a region shows its present

active tectonics, and the size of earthquake magnitudes is a measure of the degree of the activity.

Hence, maps with the spatial distribution of the

epicentres can reveal the tectonic features of the region with as much precision as the accuracy of the earthquake parameters used. Greece and the adjacent areas (ie the Greek mainland, the Aegean Sea and western Turkey) have the highest seismic activity in the whole Mediterranean and European area (Ká'rnik, 1969; Galanopoulos, 1971a).

The high seismic

activity shows that this area is tectonically very active.

This, coupled

with the fact that it is a part of the Alpine-Himalayan zone, which is the only continental region where large scale shortening is now taking place (McKenzie, 1978), makes it a region of great interest for geologists and geophysicists. In this chapter, an attempt is made to examine the validity of existing tectonic models using the recalculated parameters of the earthquakes in the area (Appendix B).

Furthermore, using the recalculated depths and

radial vertical distance-depth cross-sections, three dimensional isodepth contouring maps are produced.

These maps reveal several significant

features of the tectonic process in the region.

6.2

Morphologic, geologic and geophysic feature of the area The main morphologic and geologic features of the area of Greece and

the adjacent areas are, from south to north (see Fig. 6-1): the Mediterranean ridge (or chain) the Hellenic trench (or trough)

low

18 43

19

20

21

23

22

25

24

26

27

29

28

7 B

42

> •

ARI

G

BLACK SEA

A

[i2

S

-V

5--

---

Z

41

UI

30 43

'ç-"

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40

41

MARMARA SEA ,

I

40

. IAEGEAN

39

TURKEY

39

R

SEA

IA I

38

38 It

'

o %55i-_

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19

20

1

22 2

23

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34 NE

24

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25

26

27

28

29

33 30

MECTOR

Fig 6-1 Summary map of the Aegean region, showing morphologic and geologic trends in a schematic way.

the Hellenic arc, and the northern Aegean Sea.

The Mediterranean ridge has irregular topography and extends from the Ionian Sea to Cyprus.

It is not a mid-ocean ridge, and Finetti (1976)

investigating its tectonic features in detail suggests the name "east Mediterranean chain". The Hellenic trench consists of a series of depressions to a depth of 5100 m which parallels the Hellenic arc. The Hellenic arc is formed by the outer sedimentary arc, a link between the southern Dinarides and the Turkish Taurides, and the inner volcanic arc which parallels the sedimentary arc.

Between these two arcs

is the Cretan trough with water depth to about 2000 m.

The outer sedimen-

tary arc consists of Paleozoic to Tertiary rocks folded and faulted in several phases of the Alpine orogeny, while the inner volcanic arc consists of recent andencitic volcanism at Santorini, Nisyros, Milos and Kos. The Aegean Sea immediately north of the volcanic arc is a rather stable block of folded Paleozoic and granitoid masses.

The extreme north

includes the northern Aegean trough with water depth to about 1500 in, the northeast extension of which is probably the small depression of the Marmara Sea (Papazachos and Comninakis, 1976). Greece was surveyed gravimetrically and magnetically in the years 1971-1973 (Makris, 1975).

Along the Greek mainland the Bouguer anomalies

have negative values with a gravity minimum of -140 mGal situated at the Pindos Mountains.

The Aegean Sea is characterized by positive Bouguer

anomalies with a maximum of +175 mGal at the central trough of the Cretan Sea (Makris, 1975), while in the central and northern Aegean it is about +50 mGal.

A belt of negative free-air anomalies down to -200 mGal follows

the Hellenic trench, while the Bouguer anomalies are positive up to +180 mGal (Morelli et al, 1975).

94

Positive magnetic anomalies have been determined in several parts of the Aegean Sea.

The strongest of these anomalies have been observed

along the volcanic arc, in the northern Aegean trough and in the Cretan trough (Vogt and Higgs, 1969; Makris, 1973).

The magnetic field is

undisturbed in the Mediterranean Sea south of Crete (Vogt and Higgs, 1969). Heat flow is relatively high in the Aegean Sea floor (2.1 HFU) in the volcanic arc of the southern Aegean and Jongsma (1974), has interpreted it as due to underthrusting of oceanic crust. Seismic refraction studies and experiments (Papazachos, 1969; Makris, 1973, 1976a) have indicated that the crust thins from about 50 km below the Peloponnesus and the Pindus Mountains toward the Aegean (25-30 km) and that the central part of the Cretan Sea crust is only 20 km thick (Makris, 1976b; see Fig. 6-2).

6.3

Principle tectonic models for Greece and the adjacent areas By definition (McKenzie and Parker, 1967), seismic belts mark the

boundaries of stable plates, and focal mechanisms indicate the relative motions of adjacent plates.

Focal-mechanism studies (Constantinescu

et al, 1966; Papazachos and Delibasis, 1969; McKenzie, 1970, 1972; Ritsema, 1974) suggest southerly to westerly thrusting of the arc over the Mediterranean. McKenzie (1970, 1972) was the first to delineate a small, rapidly moving plate, which contains the Aegean, part of Greece, Crete and part of western Turkey (see Fig 6-3).

He called it the "Aegean plate".

The south-western boundaries were well defined, and earthquake fault plane solutions show that the motion between the Aegean and African plates is in a north-south direction.

The northern boundary was defined by exten-

sional and transform faults, and he concluded that it was a continuation of the North Anatolia fault (but see below).

95

The boundary with the other

42° YUGOSLAVIA

BULGARIA 42

ka ____ -I /36 /32

/.0°

36

36

ALBANIA'

l

.

1.0°

48

TURKEY 38

MOHO-C€PTH MAP OF GREECE

30 32

30

380

-42 Isolines in (krn) ccmputatk,ns fm gravity 3 setsc tn data

Athens

24

36°

) 26 28

32 32

P 14

25 CC28 3/.0 2$30

30 3234 34

240

26°

Fig 6-2 Contour map of the Moho discontinuity from gravity and seismic data (after Makris, 1973).

Fig 6-3 Sketch of plate boundaries and motions in the Aegean area obtained from seismicity and fault plane solutions (after McKenzie, 1972).

plate, the "Turkish plate", was poorly defined. After McKenzie's work, contemporary plate tectonics in the area, and its problems, were discussed by Lort (1971), Papazachos and Comninakis (1971, 1976, 1978), Galanopoulos (1972b,1973, 7 974, 1975), Comninakis and Papazachos(1972, 1976), Alvarez (1973), Dewew et al (1973), Papazachos (1973, 1974, 1976a, 1976b, 1977), Makris (1973, 1975, 1976a, 1976b, 1978), Gregersen (1977) and others.

The common point of almost all these studies

is that the African plate underthrusts Greece and the adjacent areas along the Hellenic arc.

The mean dipping angle is about 350 (Papazachos and

Comninakis, 1971; Galanopoulos, 1973; Agarwal et al, 1976; Gregersen, 1977).

However, McKenzie's model has been critized by a number of authors

(Papazachos, 1973, 1976a, 1976b, 1977; Crampin and Ucer, 1975; Mercier et al, 1976) for its simplicity and its definition of its northern and western boundaries. From the definition of the boundaries of a plate (see above), it is difficult to talk about truly stable aseismic microplates in this region. All the maps of spatial distribution of epicentres show that several small aseismic blocks exist.

Hence, most geologists and geophysicists now prefer

the name "Aegean area" rather than "plate" because of its real complexity. As Figure 6-3 shows, the northern boundary of McKenzie's plate consists of transform faults, but Mercier et al (1976), after extensive investigations in central Greece, found no evidence of a transform fault. The continuation of that northern boundary towards the North Anatolia fault has also been debated (Papazachos, 1976a, 1977; Crampin and User, 1975). Papazachos (1976a) using focal mechanisms and the spatial distribution of earthquakes in the northern Aegean, has concluded that there is an amphitheatrical Benioff-zone which, although less well defined compared with the similar one in the south Aegean, is dipping towards a

W.

thrust region which includes the northernmost part of the Aegean and part of the Marmara area. A different model for the Aegean area has been suggested by Makris (1976b,1978).

According to his model, the deformation of the region is

the surface expression of a hot mantle plume which extends to the base of the lithosphere and has been mobilized through compressional processes that forced the lithosphere to sink into the asthenosphere.

The model is

based on refractional-seismic data from which a low velocity of the compressional waves of 7.7 km/sec for the upper mantle has been determined, on gravity measurements, which show that density lower than normal is extending to the base of the lithosphere, and on the high values of heat flow in the Aegean area. This model explains that the crustal thickening along the Hllenic arc is due to the crustal down-buckling which is thickening at the compressional front. along the arc.

This collision is responsible for the high seismicity

The Hellenic trench is the result of the upwards move-

ment of the Aegean crust which is forced to override part of the IonianEast Mediterranean crust and lithosphere towards Africa.

This movement

causes a subduction zone to develop at the collision front.

According

to this model, the deep seismicity is caused by crust and upper mantle fragments dislocated from their original positions and subducted into the soft, low Q asthenosphere.

Thus more complicated Benioff-zones develop,

which differ from the Benioff-zones of the Pacific, because the interaction is between continental-continental or continental-subcontinental blocks. Recently, McKenzie (1978) published another model for the Aegean Sea and surrounding regions. one of Fig 6-3.

This model is a modification of the previous

It is based on new fault plane solutions of earth-

quakes taken from USGS and NOAA, Landsat photographs, and seismic refraction records.

The main points of this model are the following:

97

Rapid extension is taking place in the northern and eastern parts of the Aegean Sea region, whereas the southern part is relatively inactive. From the fact that the pre-Miocene geology of the islands of the Aegean closely resembles that of Greece and Turkey, and from the thin (30 km) crust of the southern part of the Aegean compared with the thick (50 km) crust beneath Greece and Turkey (see also Fig. 6-2), it is concluded that the thin crust of the Aegean has been produced by stretching the orogeriy belt by a factor of two since the Miocene.

This stretching can account for the high heat

flow, while the sinking slab produced by subduction along the Hellenic arc maintains the motion. In north-western Greece and Albania, where he found both thrust and normal faults, while his data did not show any sinking slab, the term "blob" of cold mantle detaching from the lower half of the lithosphere is introduced.

These blobs are produced by thermal

instability when the lithosphere is thickened by thrusting. The direction of relative motion between the southern Aegean region and Africa determined from fault plane solutions is 211 °E. The new information suggests that the North Anatolia Fault does not extend beneath the Aegean, and that the motions are taken up on several structures with components of normal faulting. There is no evidence to support the suggestion made in his previous model (1972) that the Anatolian Trough is connected to the Gulf of Corinth.

The main differences between his previous model (Fig 6-3) and the new one are summarized in Fig 6-4, taken from his recent paper (Mackenzie, 1978, Fig 18).

VU G

A&iatic Sea

Black Sea

BULGARIA

r ,

-

C

Sec at

Man

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S

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Mew Sea URKEV



b 9, )•

4

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Fig 6-4 Summary of the present deformation of theAegean area after McKenzie Lines with open (Long curved lines show normal faults. (1978). semicircles show thrust faults.. Solid dots mark epicentres of Arrows show the direction shocks for which mechanisms are used. The long heavy of motion obtained from fault plane solutions. arrow shows the direction of relative motion between the Aegean Heavy Vs mark sites of recent volcanism.) and Africa.

McKenzie (1978) also comments that "the theory of plate tectonics is of little value in regions such as northern Greece and Turkey where the deformation is spread over a zone".

Dewey and Sengor (1978) also

point out that plate tectonics is not useful in the Aegean area where normal faulting is not confined to a narrow zone.

These two comments

and the wide criticism which McKenzie directed against almost all the proposed models for the region may reflect the real complexity of the Aegean area.

6.4

Spatial distribution of the epicentres

6.4.1 Shallow earthquakes (h
00.00

TO

>110.00

100.00

TO

200.60

200.00

OR GREATER

MAGNITUDE(STMBOL RADIUS

U

LW e

• •

11.50 5.00

tO

5.50

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I

I

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19

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19

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19

20

21

22

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39

0 0

0 33 18

5.00

6.00

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6.50

6.50

>0

7.00

7.00

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OR 5006>00

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Fig 6-5 Spatial distribution of the epicentres of shallow depth earthquakes for Greece since 1901.

®1!1

oP

35

0.50

00

039

01

35

UP >0

24

25

26

27

28

29

33 39 ,

Chalkidiki peninsula, and the other continues through the Sporades Islands and, in an east-west direction, joins Asia Minor after reaching the north coast of Lesvos Island.

However, this branch seems to be

divided near the eastern Sporades, and a new narrow zone is developed with an almost north-south direction, which passes through the west coast of Limnos Island and ends, quite sharply, near the south coast of Thassos Island.

From the distribution of shallow earthquakes in the northeast

part of the region (Marmara area), it is not clear whether the North Anatolian Fault extends towards the Aegean Sea, or diverts into western Turkey, or both. A third well defined zone is that which follows the Saronikos and Corinth gulfs.

This zone at the west end and, in the middle of the gulf

of Patras, is curved, and joins the previous zone (central Greece) in a north-south direction, rather than continuing and meeting the arcuated first zone (along the Hellenic arc). From Figure 6-5, it is clear that at least three well defined aseismic blocks exist: the attikocycladic block, which is part of what McKenzie (1972) calls the "Aegean plate", the block formed by north-eastern Greece and the aseismic block in central Greece around the Ptolemais basin. The existence of these aseismic blocks indicates that it is difficult to talk about a simple plate model for the region.

It means that the litho-

sphere is very fragmented, which is illustrated by the existence Of these several small aseismic blocks. 6.4.2 Intermediate earthquakes (h>60 kin) Figure 6-6 is a map of the spatial distribution of the intermediate depth earthquakes.

Different symbols are used for the different depth

ranges, and the size of the symbols is proportional to magnitude ranges, as the caption of the figure describes. From Figure 6-6 it can be seen that most of the earthquakes with

Me

18 '13

19 20 ---------

21

22

23

2'l

25

26

27

28

29

30 43

KEY TO SYMBOLS DEPTHS

42

42

,41 41

41

40

30.00

10

60.00

L!\

60.00

TO

100.00

100.00

10

I40.00

140.Od

TO

200,00

200.00

06 60(61(6

MAGNITUDE ISTHOOL RADIUS

40 I

39

01

1!)

t

36

36

X0

x

-

35

X

'

x

35

AAA

311

M6

UP TO

1.50

1.50

10

5.00

5.00

10

5.50

5.50

10

6.00

6.00

JO

6.50

6.50

10

7.00

7.00

10

7.50

7.50

00 60(01(0

39

38

33 18

(SYMBOL TYPES) up 10 30. VO

ElI >
6.3 are completely reported during the whole period of investigation, whereas earthquakes with a maximum magnitude 4.7 are completely reported only during the most recent 15 years.

The

time required for estimates of the mean recurrence rate to become stable was found to be 40-50 years of homogeneous observations for magnitudes > 6.3, whereas for earthquakes with magnitudes in the range 4.2 < m < 4.7 only 5 to 10 are required. The catalogue presented in this study has a high degree of homogeneity and accuracy permitting more detailed seismotectonic studies to be made on the basis of a long instrumentally recorded data sample.

The existing tec-

tonic models of Greece were examined and their accordance with the recalculated parameters of the earthquakes was tested.

From the maps describing

the spatial and depth distribution of the recalculated earthquakes it is clear that the area is tectonically more complicated than had previously been recognised.

None of the proposed tectonic models explain the observed

seismic activity sufficiently over the whole area.

Places where further

work is necessary to understand fully the present tectonic process are:

the north-western part of the Hellenic arc (north-western Greece and Albania), the south-eastern part of the Hellenic arc (eastern Crete, Karpathos and Rodos Islands), and the northern Aegean Sea and north-western part of Turkey.

Finally, within the framework of Greek local tectonics, the evaluation of seismic risk was achieved by applying the statistical techniques of the first part of this study to the new earthquake catalogue.

The evaluation

was made in terms of maximum expected magnitude and acceleration.

To obtain

the maximum magnitude distribution both the strain energy release and the third type asymptotic distribution methods were applied.

However, the first

type asymptotic distribution is better than the third for representing the observed distribution of maximum accelerations.

A possible explanation for

this may be found in the tendency for most maximum accelerations to lie within the linear part of the acceleration attenuation curve, because the attenuation of ground motion only varies non-linearly for unusually short focal distances.

For the seismic risk analysis derived in terms of acceleration

an average formula for the attenuation of maximum acceleration was derived from most of the commonly used formulae.

This formula gives values which

agree with the observed maximum accelerations recorded from eight Greek earthquakes. Greece as a whole and six heavily industrial and highly populated centres were first selected for a detailed evaluation of seismic risk.

The

risk values obtained are consistent with the observed values during the period of investigation. 8.73 ± 0.65.

For Greece the upper bound for earthquake magnitude is

The return period for an earthquake of magnitude equal or

greater than the maximum observed m = 8.0 is about 200 years. probable annual maximum magnitude is m = 6.41 ± 0.04.

129

The most

In an area with

100km radius from the city of Athens, the upper bound is equal to in = 6.8 ± 0.4, the most probable annual maximum m = 4.51 ± 0.08.

All regions are

well fitted by the third type asymptotic behaviour, and there is close agreement in detail between the predicted and observed number of exceedances of maximum magnitudes for Greece and Athens. A detailed spatial seismic risk evaluation was obtained for the whole area of Greece by dividing it into cells of 0.5° Lat. and 0.5° Lon.

The

maximum expected magnitude and acceleration was evaluated at each grid point by applying the third and first type asymptotic distribution methods respectively.

These results are presented as contour maps and using these the

seismic risk at any locality can be evaluated.

The common feature in all

these maps is the existence of three well-defined aseismic blocks; these are:

the attikocycladic block, the block around the Ptolemais basin and, the block formed by the north-eastern part of Greece.

Also well defined are areas of high seismic risk; these are:

the Greek-Yugoslavia borders, the Chalkidiki peninsula and part of the north Aegean Sea, the north-western part of Turkey, the Cephalonia and Leukas Islands and, V)

the Eastern Sporades and Lesvos Islands area.

130

APPENDIX A

COMPUTER PROGRAM LISTING

131

Risk Analysis Program (RAP) This program is written in Fortran IV.

Its purpose is to compute

the parameters, and their uncertainties, of the first and third type asymptotic distribution of extreme values of the following variables: magnitude, acceleration, velocity or displacement.

Using these parameters it then

estimates prediction parameters and calculates probability levels. The computer procedure is

It creates a mesh of equally spaced grid points in the area of interest, It selects all the earthquakes within an area with specified radius from each grid point, finds the annual maximum magnitude, acceleration, velocity or displacement, and ranks them considering the first observed maximum as being the j + ith where j is the number of missing years. For each data set derived from the previous step, it applies the least-squares method and calculates the parameters and their uncertainties.

For the first type asymptotic distribution (eq 2-20)

the regression equation is:

m

= U +

(A- i)

and the parameters are computed using the linear least squares method (subroutine LINFIT).

For the third type asymptotic dis-

tribution (eq 2-22) the regression equation is:

m = w - (w - u)E-n((m)))J

(A-2)

where (m) is the plotting position of m given by the equation (2-35) The parameters are then computed using Marquardt's (1963) algorithm

132

as described in paragraph 4.2,2 (subroutine CIJRFIT). iv)

With the parameters and uncertainties comouted it calculates prediction parameters such as: annual mode (eq 2-56 or 2-61), T year mode (eq 2-57 or 2-62), upper and lower bounds (eq 2-66 and 2-68), extreme values with given probability P of not being exceeded in T years (eq 2-59 or 7-7 ). The listing of the program starts with a comprehensive block of comment cards.

133

C C C C C C C C C C C C C C C L

C C C C C C C C C C C C C C C C C C

THIS PROGRAM COMPUTES T E PARAMETERS AND THEIR UNCERTAINTIES (IF THE FIRST AND THIRD TYPE ASYMPTOTIC DISTRIBUTION OF EXTREMES. USTNG THESE PARAMETERS AND THE ERROR MATRIX IT COMPUTES PREDICTION PARAMETERS SUCH AS : ANNUAL MOPE ,T-YEARS MCDE,MAXIMUM EXPECTED IAGNITUDE OR ACCELERATION OF NOT BEING EXCEEDED IN T YEARS, AT A STATED PROBABILITY LEVEL.IT ALSO CO 1 PUTES UPPER AND LOWER BOUNDS FOR AX1VUM EXPECTED MAGNITUDES,ACCELERATICNS,VELOCITI ES,OR OISPLACE'!ENTS FOR GIVEN PRUBABILITY LEVELS. THF PARAMETERS OF THE THIRD TYPE ASYMPTOTE ARE COMPUTED USING •APQUR0T'S(1c63) ALGCRITHM,BY LINEARISING THE FITTING FUNCTION: M=W-(W-U)*( (-ALOG(P(M)) ) )**LAMDA

SUBROUTINE CURVFIT.

STARTING WITH INITIAL TRIAL VALUES OF W.U,AND LAMD.A (A(1),A(2).A(3)) THE GOODNESS OF FIT TO THE N OBSERVALS IS MESURED BY THE REDUCED CiII_SQUAPE WHICH IS MINIMISED WITH RESPECT TO EACH PARAMETER, LEADING TO THE LINEAR MATRIX EQUATION: BETA=DELTAA(I)*ALFA THE UNCERTAINTIES ON A(1),A(2),AND A(3) ARE THEN CALCULATED FPCM DELTAA (I) B ETAE (JHFRE E IS THE INVERSE MARTIX OF ALFA. E IS THE ERROR MATRIX AND ITS ELEMENTS ARE THE VARIANCE AND COVARIANCE OF THE PARA4ETERS W, U, AND LM-'DA. THF PARAMETERS OF THE FIRST TYPE ASYMPTOTE ARE COMPUTED USING LINEAR LEAST_SQUARES METHOD WITH THE FITTING FUNCTION: 4U+1 /A*Y WHERE YALOG(_ALOG(P(M))) ; THE REDUCED VARIABLE S

C DESCRIPTION OF THE INPUT DATA C C C DTA STREAM 5 (CARDS 1-3 AND EARTHQUAKES DATA FILE) C C FIRST CARD : FCRMAT(6F6,2) C ErATN ; C BOTTOM LATITUDE OF THE AREA OF INVESTIGATION C EMAX LATITUDE TOP C B 1 IN ; LEFT LONGITUDE C Ei4 AX : RIGHT LONGITUDE C ; STEP CF SHIFT IN LAT AND LaN HER C RADIUS IN DEGREES OF THE AREA FROM EACH GRID POINT SIZE C SECOND CARD : FCRMAT(7I5) I-

C

1) IDENT

WMA

C C C C

=1 =2 =3 =4

FCR t!AXIVUV FOP MAXIMUM FOR MAXIMUM FOR MAXIMUM

ACCELERATION DISTRIBUTION VELOCITY DISPLACEMENT MAGNITUDE

L

C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C

2) MODE =—1 =0 =1

MEIGHT=l/X(I) EQUAL EIHTS IN ALL THE INPUT DATA NCIGHT=1/SIGMAX( I)

MAXT-MINT ;PERIOD OF INVESTIGATION 3_4) LIST1,LIST2 OPTIONS FOR PRINTOUT ( C CR 1 FOR FULL PRINTOUT 5-6) 7) INT'. =1 FOR THE FIRST TYPE ASYMPTOTE =2 FOR THE THIRD TYPE ASYMPTOTE THIRD CARD EMMIN PROB

FORMAT(2F.2) INIMUM MAGNITUDE TO BE CONCIDERED : ; PROBABILITY LEVEL AT WHICH THE PREDICTION PARAMETER IS EXPECTED TO BE EXCEEDED IN T YEARS

AFTER THESE CARDS THE EARTHQUAKE DATA FILE FOLLOWS.IT CONTAINS YEAR, ORIGIN TIME, LAT, LCN. DEPTH,AND MAGNITUDE. DATA STREAM 3 (CARDS 1-3) EACH OF THESE CARDS CONTAINS THE INITIAL VALUE AND THE Si, DEVIATION OF THE PARAIIETER A(I), FIRST CARD : W-OR-DELT.AW DECONO CARD : U+OR-DELTAU THIRD CARD LAMDAOR—DELTALAMDA F 0 MAT (2 F 7 • 3)

RFAD 101, EMIN,EMAX,BMIN,BMAX,DEII, SIZE RFAD 102 IDENT,MCDE,MINT,MAXT, L15T2. LIST1 INT RFAD 101, EMMIN,PROB DIr'ENSICN A(11 p37,85) ,GY(U5) , YM(85) , Y (25), RY (4) ,Q (ô) ,TITLE (4) is Pc(35) , Y'[(5) sAl (5), DELTAA1 (5), SIGMAA1 (5), YFIT(85) 2 SIGMAB(10).DERIV(10) ,ARRAY(io,1O) '(lo) ,SIGMAG(1Q),WEITH(85) 3 ALPHA(10,10),BETA(1O),SIGYML(85),YT(1O) ,YPD(1O) P1.141592 RA D1 80.! pi PFBY1 •/DEB Ft A F D A = 0 . C 0 1 NTERMS3 Nn 11 J=1 MTERMS RFAD(3,103) Al (J) ,DELTAA1(J) 1r3 FORMAT(2F7.3)

135

11 C(1NTIUE AA1A1 ( 1 ) AA?P1 (2) AA3A1 (3) I A=( EAx-E' I J )*DEB Y+1 JA=(BMAx-B'IN)*DEbY.1. K AMAX T-M I NT+1 PRINT 2 PRINT 5000 Do 10 I=1.iA DO 10 J1,jA DO 10 K1,K 10 A(I,J,K)=0. NO =0 20 READ 200. flEAP ,TITLE ,03,ErJ ,Bc, IDEPTH,EM IF(EM.EQ.O.) GOTO9O IF(IYEAP.LT.MINT.CR.IYEAR.GT .'AXT) GO TO 20 IF(EM.LT.EflMIN) 001020 N 0 NO + 1 DFPTHIDEPTH E N L E ! A X Dn 15 I=1.IA E1=ENL-SIZE E2=EN L+S I Z E IF(EN.GE .E2) GO TO 15 IF(EN.LT.E1) GO TO 15 P V=BMIN Dfl 25 J1,JA 8160V-SIZE P?=BOV+SIZE IF(D0.LT.81) GO TO 25 IF(BO.GE.B2) GO TO 25 CALL OIRCOS(EN 'BC ,AE.BE.CE) CALL DIRCCS(ENL,PCY,AP,BP, CP) S=(AEAP)**2+(DE_8P)**2*(cE_cp)**2 IF(S.GT.O.) GO TO 27 DTST1 .0 Go TO 28 27 S=1._S*0.5 S=SQRT(1 .-S*S) IS Di STATAN ( s) RAD*1 11.11 S=SIZE*111 .11 IF(DIST.GT.RS) GO TO 25 ? R=SQRT (DI ST*DJ ST+DEPTH*DEpTH) (30 TO (2122.23,24), IDENT C C C C

THF FOLLOWING FCRrULA USED FOR ACCELERATION,

21

A=2164*EXP(E*0.7)*(R+20)**_1.3O SEE TEXT EQUATION 7-2 !JS=-1.0 M4P21 64 • * EX P ( Er'*O.7) * (R+20 • ) **J5 Go TO 26

136

C C C

THE FOLLOWING FCRULA USED FOR VELOCITY, E).L.ORPHAL AND J..A.LAHCUD, aSSA,VOL:64 22 US=-1 .34 7261 0 • ** ( 0. 52*EIA)* (P**US) Go TO 26

C C

... AND FOR 0IspLAcEr.1 ET CALCULATION

23 Us=-1.1 AIjp0,0471*10.**(EM*0.57)*(R**US) Go TO 26 24 AMP= Ell 2h K I YEAR-MI NT+1 I F (A N P • G T • A ( I J K ) ) ( I • J K ) N P IF(LIST1.EC.0) GO TO 25 C PRINT 2103,K , IYEAR ,TrTLE ,O3IEN , O , IOEPTH,EM, C 10 1ST t R, ArP • A (I J K) 25 BOYBOYDE3 15 ENL:ENLDES GO TO 20 90 PRINT 900, NO Go TO (110,120,130,140), IDENT 110 PRINT 1500 Go TO 150 120 PRINT 1600 GO TO 150

133 PRINT 1700 Go TO 150 140 PRINT 100 150 CONTINUE PRINT 250, PS PRINT 1 RYEAR25 PR0BALOG(—ALGG(1 .-PRC3)) DO 55 I1.4 RY (I )A LG (RYEAR) 55 RYEARRYEAR*2. ENI = E A X Do 50 I=1,IA flYB 1 IN DO 60 J=1.JA PRINT 400. ENL.ROY 1=0 DO 70 K1,KA IF(A(I,j.K).EQ.0.) GO TO 70 L=L+1 7J Yi(K)( I •J ,K) I(L.LT.17) GOTC6O SK=L+1 LL=SK-1 IF(LIST2.GT.0) PRINT 800 CALL RANK (K,YH,Y) KA-L

L=0 DO 95 K1 ,KA INT+K-1 LYEAR IF(A(I,j,K).E(.3.) G0T095 L=L1 SJ=(MAXT_ t. ft INTi )-SK+1+L-O.4L. pRO1SJ/('.AXTI1INT+1.12) GY ( L ) -A LOG (-A LCG (PRO1)) 1=Y+1 PRO ( L) = P 0 C 1 V M L 1 =y (M) YM ( L) =yL1 V M L ( L ) V M Li G Y K = G Y ( L) IF(LIST?.EQ.0) GO TO 95 LYEAR ,A (I ,J , K ),YML1 ,GYK ,PRC1. L PRINT 950, 95 CONTINUE PRINT 350 L,MINT,LYEAR On 56 II=1,LL Si GYM L (ii) =0 • 3 56 CONTINUE Go TO (12,13),INT C 12

CALL LINFIT(GY,Y.S1GYML , L,MODE,ALFA,SIGMAA,BHTA,SIGMAa.R) V M 00 = AL F A

YP=A LEA- ( PRCB*BHTA) PRINT 2 KY EAR1 PRINT 1300, YMOD,YP,KYEAR KY E A R =25 DO 75 N1,4 RB=RY ( N) *1H TA V T ( N) = Y M 0 0 P 0 V p U ( N) = Y p + 0 6 C PRINT 1400, YT,YPD,KYEAR 75 KYEARKYEAR*2 WR ITE(8 , 131) ENL , BOY ,YWOD, (YT( N) ,N=1,4) FORMAT (7(1 X , F 7.2)) 131 WRITE(9, 131 )ENL, oV, VP, (YPD( N) , N1 , 4) PRINT 2 PPINT 1 On TO 60 CALL CUPFIT(PpO,YML,SIGYML, LL,NTERMS,MCDE,A1,DELTAA1,SIGMAA1 13 1F LAPDA, YE IT Cd ISQR, SIGI1A3,S IGMAG) 14 ZCHISQR CALL CUPFIT( PRO ,YML,SIGYML, LL ,NTERMS , MODE ,A1 ,DELTAA1,SIGMAA1 1 F LA M 0 A V F IT C H I S Q R. S I GM A B ' S I G M AG) 1JZCMISQR IF(U,GT.0.31) GO TO 14 0 I T E (6 31) C H I S U R 31 FORMAT(iH ,'FIkAL CHISQR',F10.5) C C PRINT PA0AETERS AND ST.DEVIATIONS C

138

J R IT E (6 1 6) A 1(1) • S I GMA A 1(1) 16 FnRMAT(IH .'-)='.F7,4,3X,'SD,OF W',F74) WRITE(6,17)Al(2),SJGMA.A1(( '-) 17 FORM.AT (1H ,'U',F7.4,3X,'sD.OF U',F74) C C C

PRINT COVARIANCE MATRIX

18

32

ic

WR lIE (6. l8)A1 (3) • SIGMAA1 (3) FORMAT(1H • ' L' • F74,3X, ' S0.OF L' • F74) Dn 19 JJ=1.3 WpITE(6,32)JJ ,SIGPAB(JJ),JJ,SIGMAG(JJ) FORMAT(1H , 'CC12' ,Ii, '' F7.4,2x, 'COvi ',Ii, '' ,F7.4) CONTINUE C=0.05

C C ANNUAL MODE C ZMI =A1 (1)- (Al (1)-Al (2))* (1 .-A1 (3)) **A (3) C C N-YEAR MODE C ZMNAl(1)-(P1(1)41(2))*((1,_A1(3))/100.)**A1(3) C C UPPER BOUND FOR MAXIMUM EXPECTED MAGNITUDE IN N YEARS C C C C

MAGNITUDE WITH 70% PROBABILITY TO BE THE MAXIMUM ANNUAL MAGNITUDE ZM170=A1(1)... (A1( 1)

1(2 ) )*( (-A LOG ( .70) ) **A1 (3))

C MAGNITUDE WITH 70%PROB.TO BE THE MAXIMUM IN THE NEXT N YEARS C ZMN70A1(1)(A1(1)-ZM17O)/(1OO.**41(3)) WRITE(6,527)ZMl,ZMN,ZUN 527 FoRMT(lH .'ANNUAL MCDE',F6,2,2X,'100 YEAR MODE=', lF6.2,2>:,'up.BOUND OF 100 YEAR MODE WITH 95 coN.LEV,=',Fe.fl ITE( 7, 523) ENL, B 0 y. Zv1, zMl 70, ZMN, ZUN, zMN70 yMLI L 528 FQRMAT(3F3.2, Jo) Al (1)=AA1 A l (2)=AA2 Al (3)pt3 t-0 30YBOY.DEn 50 ENLENL-DEb 1 2 101 102 200 25u

FQRMAT(lHl) FORM AT( 1H ) FORMAT(6F6.2) FORMAT(715) FflRMT(1X ,I4 ,4 ,F41,2F32,J5,9x,F31) FflRAT(5X,'SIZE OF EARTHQUAKE SOURCE REGION', 1 F.2, ' K!"S • ' , 3) FflRM.AT(5X,213, I5,3X,213,F6.l ,F6.2.2(3X,F5.2,F6.2), 115. F6.1

139

350 F0RtAT(/19x,'UMBER OF C5SEPVED SHCCKS',15,/,19X, 1'RETWEEN',17,' - '.15.' YEARS') 19X, 'X INTENSITY') 55j F0RMAT(6(2X, F3.1 ) '' RETURN P.' FORMAT(&F10 .2) 650 FORMAT(6F10.7,' SHOCKS/Y,') 30u FORMAT(13X. 'K YEAR' ,5X, 'A'lP, ' ,5X,'RANKED' •6X 'G(Y) 1 5X 'PROB.'. 3X. 'L') cj FORMAT(5XS'NUMBER CF PROCESSED EARTHQUAKE DATA',15) 95) F0RMAT(1OX, I,, 15.4F10.3, I) YEAR') 1300 FoRMAT(,16X,2(2X,F9.2),I5, FORMAT( 16X,2(2X ,F9.2),15,' YEARS') 14 isco FORMAT ( 5X , 'RISK ANALYSIS BASED ON THE ACCELERATION VALUES 1 IN CM./SEC.**2 1 ) 1630 FORMAT(5X,'k'ISK ANALYSIS BASED ON THE VELOCITY VALUES IN' 1' CM./SEC.') 1700 FnRMAT(5X,'RISK ANALYSIS BASED ON THE DISPLACEMENT VALUES', 1' IN CM,') 1810 FORMAT(5X.'RISK ANALYSIS BASED ON THE MAGNITUDE VALUES') 2130 FORMAT(1X, 12. 14, 4A4. F4,i 2F8,2, IS. F5 •j , 27,i ,2F7,2) 5000 FOMAT(,9X ,'RISK ANALYSIS IN A GIVEN REGION BASED ON THE'/, 15X.'GU14bEL"S STATISTICAL THEORY OF EXTREME VALUES, '/) STOP E Ni 0

SUBROUTINE DIRCGS(RLA, RLO.A. B, C) P13.141592 RADPI/l 80. EN = P LA R AD Bo=R LO* PAD EN=ATAN(O.9923*SIN(EN)/COS(EN)) C= SIN(EN) x=-COS(EN) D= SIN 00) E= — COS (BC) A= X*E B=D*X F T UP N END SUBROUTINE RANK (N.Y , X DIMENSION X(85) ,Y(35) V U AX = 1 • E 38 X 1 = Y U AX DO 10 J1,N YUIN1 .E37 Dr 20 11,N IF(V(1).GE.YMI) GO TC 20 Y 1 INY (I) K=i IF(Y(I).GT.X1) GO TC 2U

140

YM I N = Y ( I ) 20 CONTINUE XJ)=YMIN X 1 =YM IN lu Y(K);YMAX R E TURN END C C C C C

SUBROUTINE CURVFIT (X.?. SIGMAY,NPTS, NTERS.MODE,A,OELTA, SIGMAA,FLA0A,YFIT ,CHISQR) PURPOSE MAKE A LEAST-SQUARES FIT TO A NON LINEAR FUNCTION WITH A LINEARISATION OF THE FITTING FUNCTION SUBROUTINE CURFIT (X,?, SIGMAY,NPTS,NTERMS,MCDE,A, DELT.AA, 1 si GMAA • F LAMDA ,YFIT. CH I SQR, SI GMAB ISI GMAG) DOUBLE PRECISION ARRAY DIMENSION X (100) ' (( oo ) , SIG rA AY ( 100 ) .A ( 1O ), OELTAA ( 1O ) .SIGMAA(1O). SI GMAG (ic ) 'SI GMAD 1 '(F IT i DIMENSION WEIGHT(100),ALPNA(1O ,1O),BETA(1O) ,DERIV(lO) 1 ARRAY(10,1C) .(1O) 11 NFREENPTS_NTERMS IF(NFREE) 13,13,20 13 CHISoRO. Go TO 110

C C C

EVALUATE WEIGHTS 20 21 22 23 25 27 29 30

C C C

DO 30 I=1.NPTS IF (MODE) 22.27.29 IF ('((I)) 25.27,23 WEIGHT(I)=J./Y(l) Go TO 30 WFIGHT(I)1 .I(-y(I)) Go TO 30 WEIGHT(I)=l. Go TO 30 WEIGHT(I)1 •/SIGMAY(I)**2 CONTINUE

EVALUATE ALPHA AND BETA MATRICES 31 DO 34 J=i .NTERMS 3FTA(J )=0. DO 34 K1,J 34 ALPHA(J,K)C. 41 DO 50 I1,NpTS CALL FDERIV (X, I,A,DELTAA,NTERMS,DERIV) Do 46 J1, 'NT ERS DO 66 K1.J ALPHA(J , K ) ALPIA ( J • K)+WEIG1T( I )*DERIV(J )*DERIV(K) 56 CONTINUE 51 Do 53 J=1.:TERNS Do 53 K1,J 40

141

3 ALPHA(K,J)ALPHA(J,K) C C C

EVALUATE CHI SQUARE AT STARTING POINT 61 00 62 I11NPTS 62 YFIT( I)=FUicT:x, I, A) 3 CHISQ1FCHISQ(Y, SIGtAYSNPTS,NFREE,MOPE,YFIT)

C

LJRITE(6,66) CiIISQ1 66 FORMAT(1H ,'CHISQ1=',F10.5)

C C INVERT MODIFIED CURVATURE MATRIX TO FIND NEW PARAMETERS C 71 00 74 J 1' NIT ERMS 00 73 K=1,NTERMS 73 ARRAY(J ,K)ALPHA(J,K)/SQRT(ALpHA(J,J)*ALpHA(K,K)) 74 AR RAY (J • J ) =1 • F LMDA 70CALL N1ATINV (.ARRAYINTERMS,DET) $1 On 84 J1,NTERMS 8(J)=A(J) Do 84 K=1 , NTERMS 7 B(J)8(J)+BETA(K)*ARRAY(J,K)/SQRT(ALPHA(J S J)*ALPHA(K,K) C C IF CHI SQU4RE,INCREASE FLAMDA AND TRY AGAIN C 1 Do 92 I=1,PTs 92 YFIT(I)=FUrJCTN(X, 1,8) 93 CHISQRFCHISQ(Y,$IGMAY,NpT5, NFREE,MODE,YFIT) C WRITE (6,999) CHISQR 999 FORMAT(1H •'CHISQR',F1O.5) WRITE(6,998) A(1),A(2),A(3) C 998 FORMAT(1u , 'W',F7,4,3X,'U' ,F74,3X, 'L',F7,4) IF (cHIS01—CHISQR) 951010o1 95 FLAMDA1 0.*FLAHDA GO TO 71 C C EVALUATE PARAMETERS AND UNCERTAINTIES C 101 Do 103 J1,NTERMS A(J)=B(J) SIGMA 8(J)ARRAY(J,2)/SQRT(ALPHA(J,J)*ALpHA(21 2)) SIGMAG (J)ARRAY(J,1)/sQRT(ALPHA(J,J)*ALpHA(1,1)) 103 SIGMAA(J)0SURT(ARPAY(J ,J)/ALpHA(J ,j) ) FL AMDAF LADA/1 0. 110 RFTUWN END C C FUNCTION FUNCTN (FOR THE THIRD ASYMPTOTIC DISTRIBUTION) C C

FIJNCTN(X,1,A)W_(WU)*Z(I)**L FUNCTION FUNCTN(X, I,A) DI 4ENS ION X (10 u A (10) X i=X ( I ) 17

142

Z1—ALOG(XI) Z2Z1**A (3) z3=(A(1 )—A(2) )*z2 F U N C T N = A (1) - z 3 20 RFTURrJ END C C FUNCTION FCHISQ C C PURPOSE C EVALUATE REDUCED CHI SQUARE FOR FIT TO DATA C FCHISQ=SUM((Y-YFIT)**2/SIGMA**2)/NFREE C FUNCTION FCHISQ(Y,SIGMAY, NPTS,NFREE,MODE, YFIT) DOUBLE PRECISION CHISC,WEIGHT DIMENSION Y(ioo) ,SIGMAY(100) .YFIT(1O) 11 CHISQQ• 12 IF (NFREE) 13,13,20 13 FCHISQ=O. Gc.TO 40 C C

ACCUMULATE CHI SQUARE 20 21 22 23 25 27 29 30

C C C

C C C C C C

DC 30 11,NPTS IF (MODE) 22.27,29 IF(Y(I)) 25.27.23 WEIGHTI./Y(I) t3ç 10 30 WEIGKT1 ./(-y( I)) Go TO 30 WEIGHT1. Go TO 30 WEIGHT1 ./SIGMAY(I)**2 CHISQ=CHISQ+WEIGHT*(Y(I)_YFIT( I))**2

DIVIDE BY NUMBER OF DEGREES OF FREEDOM 31 FREE=NFREE 32 FCHISQ=CM ISC/FREE 40 RFTURfJ END SUBROUTINE FDERIV

ANALYTICAL ,

PURPOSE EVALUATE DERIVATIVES OF FUNCTION FOR LEAST - SQUARES SEARCH FOR ARBITRARY FUUCTIQN GIVEN BY FUNCTN SUBROUTINE FDERIV (X, I,A,DELTAA.NTERMS,DERIV) DIMENSION x(100) .A(1Q),DELTAA(1o) ,DERIV(1O) XI = X ( I ) Z1ALOG(XI) Z?zZl **p (3) DFRIV(1 )=1 .-z2 D FR IV (2) Z?

143

DERIV(3)=-(, (1)A(2))*Z2*ALOG(Z1) RETURN END C C C C C

C C C

SUBROUTINE MATINV PURPOSE INVERT A SYMMETRIC MATRIX AND CALCULATE ITS DETERMINANT SUBROUTINE MATINV (ARRAY, NORDER, DET) DOUBLE PRECISION ARRAY, AMAX, SAVE DIMENSION ARRAY(10,10) • IK(io) •JK(IC) DFT1 Dr 100 K1,NOROER FIND LARGEST ELEMENT ARRAY(I,J) IN REST OF MATRIX A MAX = 0. 21 00 30 I=K,NCRDER Do 30 JK,NORDER 23 IF (DA3S(A4AX).DA3S(ARRAY(I,J))) 24.4,30 21e AMAXARRAY(I,J) IK(K)I J K (K) =J 30 CONTINUE

C C INTERCHANGE ROWS AND COLUMNS TO PUT AMAX C 31 IF (AMAX) 41,3.41 32 DFT=O. Go TO 140 41 IIK(K) IF (I-K) 21.51.43 43 Do 50 J1,NORDER S A V EAR R A Y (K. J ) ARRAy(K,J)ARRAy(I,j) 53 ARRAY(I,J)=-SAVE 51 J = J K ( K ) IF (J-K) 21.61.53 53 DO 60 I=1,NCRDER SAVEARRAY (I • K) ARRAy (I, K)ARRAY( I • j 60 ARRAY(I ,J)=-SAVE C C ACCUMULATE ELEMENTS OF INVERSE MATRIX C 61 Do 70 I=1.NORDER IF (IK) 63.70.63 63 APRAY( I.K)ARRAY(I,K)/AMAX 70 CONTINUE 71 Do 80 11,NORDER 00 80 J1,NCRDER IF (I-K) 74 .80 .74 74 IF (JK) 75.80.75

144

IN

ARRAY(K.K)

75 ARRAY( I,J)RRAY(I,J)4 ARRAy(I,K)*ARRAy(K,J) 80 CONTINUE 1 on 90 J=1,NORDER

IF (J-K) 83.90,83 83 ARRAY(K,J )=ARRAV(K,J ) /AMAX 90 CONTINUE ARRAY (K. K) 1 • /AMAX 100 OETDET,AMAX C C C

RESTORE ORDERING OF MATRIX 101 DO 130 L=1,NORUER K=NORDER-L+1 j=IK(K) IF (J-K) 111.111.105 105 DO 110 11.NORDER SAVEARRAY (I. K) ARRAy(I , K)=-ARRAy(I ,j) 110 ARRAY (I, j ) SAVE 111 IJK(K) IF (I-K) 130.130.113 113 On 120 J1.NOROER SAVE=ARRAY(K ,J) ARRAy(K,J )-ARRAy( I • J ) 120 ARRAY(I,J)=SAVE 130 CONTINUE 140 RETURN END

C C

C C

SUBROUTINE LINFIT(X,Y,SIGMAY, NPTS,MODE.A,SIGMAA,B,SIGMAB. R) DOUBLE PRECISION SUM,$UMX,5UMY, SUMX2, SUMXY,SU?Y2 DOUBLE PRECISION XI • VI ,WE!GHT, DELTA,VARNCE 0 IIENS ION X (100). Y (100), S IGMAY (100) ACCMULATE WEIGHTED SUMS 11 S'JMO. S U MX = 0. S U M V = 0. S U MX 2 0. S U M X =3. SLIV V 2=0 21 oo 50 I=1.NPTS X T =x (I) Vi =Y ( I ) IF(MODE) 31.36.38 31 IYI) 34.36.32 32 WFIGHT1,/YI GO TO 41 34 FIGHT1./(-yI) GO TO 41 3o WFIGHT1 • Go TO 41 38 WErGHT1 ./SIGMAV( I)**2

145

1 SLJMSUtA+WEI Gil T SUMXSUMX+WEIGHT*XI SLJMYSUMY W E IG lT*y I SUM X 2 = S U MX? + El G 1 T * X I * X I SUMXY=SUMXY+4EIG9T*XI*YI S U M Y 2 S U M Y 2 W El S T * Y I * V I 53 CONTINUE C C CALCULATE COEFFICIENTS AND ST. DEVIATIONS C 51 DF LTAStJM*SUMX2-SUMX*SUMX A = ( $ U M X 2 * S U M V - SUM X * S U M X Y)/ DEL T A 53 B=(SUMXY*SUM_SUMX*SU1Y) /DELIA 1 IF(MODE) 62,64,62 62 VAPNCE1. Go TO 67 64 C=NPTS-2 V A RNCE(SUY2+A*A*SUB*5*SUMX??.*(A*SUMYGB*SUMXVA*B*SUMX))/C 67 ST 0MAADSRT( VARNCE*SUMX2/DELTA) 6.3 S TGMABSQRT (VARNCE*SUI/DELTA) 71 R(SUM*$IJMXY..SUMX*SUMY) /D$RT(DELTA*(SUM*SUMV2_SUMY*SUMV) ) WRITE(6,100)A,SIGf'IAA,B,SIGMAB,R 100 F0RMAT(1H 'U'F7.4,2X, 'S•D.QF U:'.F64. '1/A,F7.4, 12X , 'S.D,O 1/A'.F6,4,30X1'R.F1O.5) RETURN END C C C C EXAMPLE OF INPUT DATA C C STREAM 5 C -39.95-45.28-19.00-28.00-00.50--l.00 C C 1900-1970----1 ---- -----C --4.20--°.30 -1920-APR 15---O9-20-37.3---39.99---20.25-123 ---------5.7 C C C C STREAM 3 C C C ---7.30 --- 0•08 .--0.20---0.04 C C C

146

APPENDIX B

Earthquake catalogue for Greece since 1901

147

EARTHQUAKE CATALOGUE FOR GREECE SINCE 1901 0 The geographic region studied is 33.0 N to 42.5°N and 19.00E to 0 29.0 E.

The parameters listed for each earthquake are: i) Date,

ii) Origin time, iii) Latitude, iv) Longitude, v) focal depth, vi) Number of reported stations, vii) Surface-wave magnitude, and viii) Shift of recalculated epicentres from the ISS locations in distance (kin) and in azimuth (degrees).

The catalogue presented here contains:

Earthquakes for which all parameters are recalculated (1917-1963). For these earthquakes, the focal depth error is estimated to be less than ± 10km for h < 50km and ± 15km for h 50km. Earthquakes which do not permit relocations for the period 19011963.

For these earthquakes, instead of the number of reported

stations, the appropriate reference is given. Earthquakes for which relocations are not attempted (1964-1968). For these earthquakes all parameters, except magnitude, are those given by ISC.

Since 1907 the surface-wave magnitude for all earthquakes in the catalogue are determined using the Swedish network ground amplitude records and the conversion formulae (5-4), (5-7), and (5-9).

The standard dev-

iation of these magnitudes may, in general, be estimated as around ± 0.3 units. The abbreviations used for references are:

UNS: Earthquake catalogue of Shebalin et al, 1974 ATB: Earthquake catalogue of Alsan et al,, 1975, and ", 1969. ROT: Earthquake catalogue of Rothe

Complete details of the method by which this catalogue was produced are given in Chapter V.

MM

DATE 1901 DEC 24 1902 APR 11 1902 JUL 05 1902 NOV 05 1903 MAR 15 1903 MAY 29 1903 JUL 21 1903 AUG 11 1903 NOV 25 1904 APR 04 1904 04 1904 04 1904 13 1904 19 1904 25 1904 AUG 11 1904 18 1904 OCT 10 1905 JAN 20 1905 JUN 01 1905 01 1905 03 1905 JUL 16 1905 AUG 04 1905 06 1905 OCT 08 1905 23 1905 NOV 08 1905 18 1906 MAP. 03 1906 SEP 28 1907 AUG 16 1908 MAY 17 1908 JUN 23 1909 FEB 15 1909 MAY 30 1909 JUN 15 1909 JUL 15 1909 OCT 29 1910 FEB 18 1910 23 1910 AUG 02 1910 21 1911 FEB 18 1911 MAR 11 1911 APR 04 1911 30 1911 OCT 22 1912 JAN 24 1912 25 1912 FEB 13 1912 APR 19 1912 21 1912 MAY 17 1912 AUG 09

ORIG.TINE GMT

TAT N

LON E

DEPTH KM

OBS

MAG MS

23 18 00 18 35 00 14 56 30 23 50 00 19 03 00 09 34 54 13 03 00 04 32 54 23 16 42 10 02 34 10 25 55 11 09 00 09 55 00.0 18 14 00 20 02 00 06 08 00 20 07 00 17 40 00 02 32 30 04 42 15 21 46 48 05 10 43 12 21 04 05 09 00 23 45 55 07 27 30 02 38 36 22 06 00 00 19 00 21 56 00 02 30 00 13 00 00 12 30 42 14 45 00 09 34 00 06 14 00 23 30 00 00 34 42 16 04 42 05 09 18 07 52 00 02 33 09 16 11 30 21 35 15 20 40 18 15 43 53 20 42 30 22 32 00 16 22 53 19 52 48 08 03 54 00 20 00 02 53 48 16 38 00 01 29 00

37.2 38.5 40.8 38.2 37.8 39.8 38.2 36.3 42.1 41.78 41.80 42.0 42.41 42.0 42.0 37.7 38.0 38.4 39.7 42.0 42.3 42.1 42.0 42.1 42.0 41.8 41.4 40.3 41.0 41.0 40.9 41.1 35.5 38.4 42.5 38.25 39.2 37.9 38.0 35.7 41.7 37.0 34.4 40.9 42.0 36.5 36.0 39.5 38.1 38.2 40.9 38.2 37.5 34.5 40.6

22.2 23.5 23.2 20.5 21.2 18.7 21.8 23.0 23.2 22.98 23.10 23.0 22.8 23.1 23.0 26.9 27.0 27.2 22.9 19.5 19.2 19.6 19.6 19.6 19.5 23.1 24.0 24.4 23.0 20.0 20.7 21.2 24.0 27.2 26.5 22.2 22.2 21.5 27.0 24.0 23.4 21.0 27.0 20.75 23.0 26.5 30.0 23.0 20.5 20.6 20.6 20.5 19.5 24.8 27.2

15 24 11 13 18 30 20 120 6 15 18 15 45 8 15 5 30 20 5 18 20 12 12 9 20 19 65 17 16 5 20 13 120 25 6 20 14 3 20 90 12 20 173 15 50 140 140 15 11 30 16 10 15 30 16

UNS

5.8 5.8 6.6 5.5 5.7 6.0 5.6 8.0 6.5 7.1 7.8 5.5 5.5 5.9 5.5 6.2 6.0 5.8 5.6 6.6 5.5 5.5 5.4 5.9 5.5 6.4 5.6 7.4 5.6 5.7 5.7 6.2 6.4 5.1 6.1 6.0 5.6 5.7 5.5 6.2 5.2 5.0 6.0 6.4 5.4 6.5 6.0 5.6 6.3 5.5 5.8 5.1 5.0 5.7 7.3

149

UNS UNS

UNS UNS UNS

UNS UNS

UNS UNS UNS UNS UNS UNS UNS UNS

UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS

DATE 1912 1912 1912 1913 1913 1914 1914 1914 1914 1914 1915 1915 1915 1915 1915 1915 1915 1915 1915 1916 1916 1916 1916 1917 1917 1917 1917 1917 1917 1917 1918 1918 1918 1918 1918 1918 1919 1919 1919 1919 1919 1919 1919 1919 1919 1920 1920 1920 1920 1920 1920 1920 1920 1920 1920

AUG 10 10 SEP 13 JUL 06 SEP 30 SEP 17 OCT 17 17 NOV 23 27 JAN 27 JUN 04 24 AUG 07 10 10 11 11 19 FEB 06 MAY 20 SEP 27 NOV 25 MAR 14 APR 26 MAY 23 AUG 20 NOV 28 DEC 24 27 JAN 27 FEB 09 MAR 17 JUL 04 16 NOV 13 JAN 05 FEB 24 APR OS JUL 18 AUG 22 OCT 25 25 NOV 18 DEC 22 JAN 09 FEB 25 APR 02 MAY 01 JUL 21 SEP 14 28 OCT 13 21 NOV 15

ORIG.TIME GMT

LAT N

09 23 00 18 30 00 23 31 00 07 05 48 07 33 36 13 06 40 06 22 32 10 42 00 09 06 00 14 39 44 01 09 26 17 22 02 05 20 36 15 04 03 00 47 55 02 02 34 09 10 15 09 58 10 06 42 16 14 39 40 22 14 00 15 02 13 02 02 48 18 13 32.8 13 14 30.1 05 46 29.0 23 02 12.4 10 21 12.6 09 13 58.2 07 42 10.1 12 56 35 12 28 47.2 13 44 53.8 11 25 00 20 03 45.7 10 13 27 15 25 30 01 55 58.8 04 1 55 07 01 20 22 35 49.8 17 10 12.0 17 54 00.5 21 54 57.0 23 41 01.8 12 00 00 23 34 30.3 15 34 25.8 06 34 40 14 29 42.5 02 08 45.3 15 17 37.3 23 12 00 18 57 51.7 09 20 51.4

40.6 40.6 40.1 35.9 35.0 37.8 38.2 38.2 38.8 38.8 38.5 39.1 35.0 38.5 38.5 38.5 38.5 38.5 39.0 39.0 38.2 38.8 38.0 39.70 39.56 38.78 40.31 37.07 38.65 35.76 38.5 39.26 34.13 40.2 36.22 37.8 40.0 36.70 37.0 36.0 37.75 36.56 38.28 39.41 39.75 41.8 40.30 36.75 37.0 35.32 40.88 37.89 38.0 39.43 35.11

LON E

DEPTH KM

27.1 15 27.1 15 26.8 15 23.2 15 24.0 60 21.0 40 23.5 8 23.5 24 20.6 8 20.6 6 20.6 15 21.4 4 24.0 36 20.5 12 20.5 7 20.5 16 4 20.5 20.5 6 14 20.0 14 23.5 23.2 28 23.0 6 19.0 15 20.30 15 19.91 18 19.80 20 25.29 62 20.18 10 21.86 15 21.07 18 22.0 24 23.65 50 29.39 35 20.5 15 27.26 113 27.3 35 20.0 16 21.00 5 26.0 15 28.0 15 19.32 12 25.86 59 23.72 44 26.09 20 20.62 10 26.2 20 19.16 45 26.64 10 28.7 30 25.05 123 21.60 15 28.35 10 19.8 15 20.36 10 25.89 87 150

CBS

MAG SHIFT MS DIST KM AZIM DEG

UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS UNS 8 8 14 18 12 17 8 UNS 12 14 UNS 28 UNS UNS 21 UNS UNS 11 25 9 27 22 UNS 11 ATB UNS 14 11 ATB UNS 18 10

6.5 5.3 6.9 5.3 5.7 5.5 6.0 5.3 5.0 6.1 6.3 6.0 5.2 6.5 5.7 6.2 5.8 5.4 6.0 5.5 5.5 5.8 5.1 5.1 5.0 5.7 6.1 5.5 5.8 5.0 5.1 5.7 5.6 5.2 6.2 5.5 5.2 6.1 5.0 5.0 5.3 5.8 5.0 7.0 5.9 5.6 5.3 5.5 5.0 5.6 5.3 5.7 5.0 5.7 5.1

232.40 49.72 118.98 64.09 64.09 410.81 680.79

305.68 189.00 241.32 250.94 138.12 241.32 220.95

445.40 237.46 243.17 148.17 86.88

95.59

13.38

51.63

580.62 233.28 50.59 194.40 246.39 305.91 140.19 261.85 59.88 326.94 362.11

298.56

205.51 16.31

300.34 147.68

70.60 106.00

153.89 50.02

DATE 1920 1920 1920 1920 1921 1921 1921 1921 1921 1921 1921 1921 1922 1922 1922 1922 1922 1922 1922 1922 1922 1922 1922 1922 1922 1922 1922 1922 1923 1923 1923 1923 1923 1923 1923 1923 1924 1924 1924 1924 1925 1925 1925 1925 1925 1925 1925 1925 1925 1926 1926 1926 1926 1926 1926

NOV 26 27 29 DEC 18 JAN 27 MAR 30 MAY 10 22 JUN 26 AUG 10 SEP 13 14 JAN 12 MAR 08 APR 11 JUN 05 09 09 JUL 22 AUG 08 11 13 13 15 NOV 04 11 DEC 07 07 JAN 21 MAR 10 MAY 20 29 JUN 04 AUG 01 OCT 09 DEC 05 JAN 22 FEB 16 NOV 13 DEC 23 FEB 07 MAR 17 APR 05 05 12 15 JUL 06 AUG 16 SEP 01 JAN 13 13 FEB 26 26 MAR 01 18

ORIG.TIME GMT

TAT N

08 51 08.5 16 26 20 15 48 05.8 02 01 32.3 11 30 09 15 06 08.8 04 56 08.7 21 23 16 03 40 57.1 14 10 40.4 08 59 56.6 03 27 36.8 10 41 47.9 17 34 02.9 04 35 20.6 04 31 04.8 15 36 34.4 16 13 31.2 16 26 56.8 03 49 15.0 08 19 46.2 00 09 57.2 12 46 11.2 14 53 26.6 04 20 18.6 22 13 10.5 16 22 28.7 16 37 00.9 04 13 32.5 19 48 51.6 20 51 40.8 11 35 04.9 20 33 34.9 08 16 34.7 23 10 21.0 20 56 51.4 11 05 44.1 09 01 06 09 43 59.0 17 04 50 12 14 45.4 15 32 00 03 04 43.3 03 53 55.4 19 27 00.9 06 14 30 12 15 54.3 20 59 14.6 08 16 30.4 01 46 58.2 08 08 40.7 15 46 34.8 16 08 26.7 20 02 01.8 14 06 14.0

40.26 39.3 40.56 41.18 36.0 41.48 38.93 37.0 39.75 42.39 38.82 37.51 39.28 34.21 40.04 34.66 41.71 41.50 34.58 37.58 34.85 35.31 35.61 37.89 36.64 37.84 42.08 40.01 36.55 34.62 38.28 40.51 37.15 34.67 37.05 39.84 39.51 37.5 39.20 42.1 35.37 37.2 35.06 36.87 38.64 35.5 37.79 37.44 37.56 38.06 38.43 37.17 37.85 37.15 35.99

LON E

DEPTH KM

19.44 08 26.5 14 21.29 12 20.58 10 28.0 15 20.03 18 20.55 12 28.7 32 20.20 54 21.86 71 20.93 11 20.45 28 20.70 8 23.46 50 19.25 15 22.59 18 20.77 45 19.48 40 22.44 46 24.29 67 27.07 53 27.80 45 27.70 34 23.17 97 20.32 35 22.03 32 21.06 15 21.51 25 20.14 10 26.53 12 20.14 20 25.80 160 24.51 118 25.36 91 19.93 15 23.60 20 28.40 80 23.0 15 20.90 85 24.7 22 20.67 5 26.2 15 29.34 150 29.12 3 23.52 24 29.0 15 21.94 70 28.77 10 29.17 130 28.81 52 28.68 12 21.59 8 21.47 6 29.61 68 30.13 42

151

OBS

MAC SHIFT MS DIST KM AZIM DEC

23 UNS 11 11 UNS 25 17 UNS 23 31 26 15 13 18 21 31 13 13 26 29 40 47 26 15 31 16 21 10 20 24 16 ATB 13 34 9 50 ATh 15 17 13 25 13 27 10 14 UNS 53 ATB 23 28 24 35 29 49 81

6.0 5.3 5.2 5.2 5.4 5.7 5.1 5.2 5.4 6.0 5.6 5.1 5.0 5.5 5.5 5.8 5.0 5.1 5.4 5.4 6.5 6.9 5.8 5.1 6.0 5.2 5.8 5.5 5.2 5.5 5.2 5.2 5.1 5.5 5.0 6.6 5.3 5.5 5.3 5.1 5.5 5.0 5.7 5.3 5.0 5.1 5.8 5.0 5.4 5.8 5.7 5.8 5.6 6.1 7.0

56.04

301.35

126.22 140.05

60.04 20.35

254.73 415.47

283.06 237.72

85.17 157.37 98.62 54.82 100.13 145.35 51.54 38.98 144.68 208.70 47.18 114.47 153.07 78.79 51.31 46.04 43.32 93.66 247.71 129.08 59.56 90.16 135.79

306.24 10.87 22.29 184.65 142.85 257.64 175.22 167.66 187.61 217.49 186.74 85.16 213.77 193.37 212.16 19.05 201.96 294.09 20.75 89.02 212.87 278.78 213.69

203.58 334.39 129.79 106.01 266.85 200.91 38.92 242.68 117.89

138.68

152.98

144.80

58.03 147.54 152.50 4.03 598.99 307.19 45.40

120.92

226.34 225.62 61.12 276.49 86.38 303.86 130.31 254.09 140.53 286.52 52.33 318.32 27.31 123.92

DATE 1926 MAR 18 1926 19 1926 24 1926 31 1926 APR 22 1926 JUN 10 1926 26 1926 JUL 05 1926 AUG 18 1926 30 1926 SEP 19 1926 OCT 23 1926 DEC 17 1926 17 1927 MAR 24 1927 JUN 30 1927 JUL 01 1927 28 1927 AUG 07 1928 JAN 22 1928 MAR 31 1928 31 1928 APR 10 1928 14 1928 14 1928 18 1928 18 1928 18 1928 18 1928 22 1928 22 1928 25 1928 28 1928 29 1928 MAY 26 1928 JUL 15 1928 DEC 10 1929 JAN 17 1929 23 1929 MAR 27 1929 27 1929 APR 17 1929 NOV 11 1929 DEC 20 1930 JAN 15 1930 23 1930 FEB 14 1930 23 1930 MAR 06 1930 06 1930 31 1930 APR 17 1930 AUG 05 1930 SEP 13 1930 NOV 21

ORIG.TINE GMT

TAT N

LON E

DEPTH KM

OBS

HAG SHIFT MS DIST KM AZLM DEG

17 52 52.6 00 28 30.0 07 04 42.9 15 06 45 07 11 54.1 19 16 24.4 19 46 42.1 09 21 57.3 17 05 02.3 11 38 04.5 01 04 01.9 01 58 55.1 06 31 11.1 11 39 58.2 14 46 47.5 22 59 49.6 08 19 01.0 06 49 57.2 06 33 50 00 18 26.0 00 29 47.7 05 12 37.7 01 03 18 08 59 58.0 10 23 47.1 19 22 51.2 19 40 56 20 05 45 23 14 53.1 19 59 29.4 20 13 55.9 09 25 54.4 17 59 05.5 09 49 20.7 05 55 30.2 09 33 60.7 07 03 07.5 00 06 40 11 14 28.5 07 41 46.5 21 06 10 11 48 18.5 07 35 02.7 20 19 34 23 58 22.9 10 53 58.6 18 38 18.6 18 19 20.7 08 21 47.0 09 18 34.2 12 33 51.4 20 06 49.2 23 23 08.6 20 06 03.2 02 00 29.5

35.86 36.23 35.90 36.0 35.99 38.84 36.75 36.55 38.08 36.76 36.09 41.00 41.26 41.11 35.45 39.33 36.72 40.33 42.4 38.83 38.01 39.49 37.4 42.34 42.29 42.27 42.2 42.0 42.27 38.40 38.08 42.54 42.00 37.71 39.84 37.91 36.32 40.6 35.20 36.63 35.0 36.55 36.68 40.2 36.93 35.44 35.96 39.86 34.78 35.03 39.70 37.80 34.79 37.85 40.28

30.05 29.93 28.97 29.0 29.23 21.20 26.98 26.56 20.93 23.16 22.08 20.00 20.01 19.79 26.39 20.81 22.85 20.12 19.5 22.60 27.92 27.74 26.1 26.02 26.05 25.35 25.1 26.0 25.52 23.34 23.12 26.23 25.27 23.08 19.80 27.57 24.59 19.6 24.52 26.68 20.0 24.43 26.21 23.8 28.25 27.31 24.71 22.75 26.31 24.73 23.34 23.17 26.71 22.77 19.64

61 25 90 15 140 76 109 175 56 26 71 15 20 15 2 2 45 70 6 12 12 10 15 19 21 7 45 36 12 28 8 12 10 84 42 13 110 15 28 106 15 11 15 6 45 52 91 70 101 87 10 66 38 183 42

36 30 24 UNS ATB 25 96 19 42 75 49 30 39 44 35 46 68 12 UNS 13 68 ATE UNS 88 18 95 UNS UNS 39 22 56 41 27 28 18 49 39 UNS 42 25 UNS 14 15 UNS 11 16 81 65 29 50 66 70 23 14 71

5.2 5.0 5.5 5.0 5.2 5.1 7.3 5.1 5.5 7.0 5.9 5.2 5.7 5.8 5.7 5.7 6.5 5.0 5.0 5.1 7.0 5.2 5.1 7.0 5.5 7.1 5.6 5.5 5.7 5.4 6.5 5.9 5.6 5.5 5.0 5.8 5.5 5.1 5.2 5.1 5.0 5.1 5.0 5.1 5.0 5.0 6.2 6.1 5.5 5.7 6.1 6.1 5.0 5.3 6.1

152

103.25 116.78 44.75

66.90 45.77 356.51

119.38 123.79 134.66 39.10 83.50 66.07 111.19 51.87 27.65 61.47 109.28 87.71 137.06

288.85 312.58 218.71 76.63 170.13 6.28 0.00 55.84 63.29 35.31 289.98 188.80 326.90

37.97 55.04

13.33 187.36

74.95 342.03 68.89 342.54 101.19 309.12 90.65 46.81 34.85 93.64 91.94 34.22 25.08 26.21 180.33

314.66 342.53 285.02 356.47 291.63 198.20 223.97 112.75 228.78

56.47 25.37

322.09 139.50

147.76 29.51

200.22 242.88

224.64 52.01 26.94 98.01 32.55 57.82 65.84 77.89 91.74 91.66 33.65

17.31 340.54 260.45 347.37 345.15 205.31 239.68 358.05 343.16 335.57 20.95

ORIG.TIME GMT

DATE

1930 1931 1931 1931 1931 1931 1931 1931 1931 1931 1931 1931 1931 1931 1932 1932 1932 1932 1932 1932 1932 1932 1932 1932 1932 1932 1932 1932 1932 1932 1933 1933 1933 1933 1933 1933 1933 1933 1933 1933 1933 1933 1933 1933 1934 1934 1934 1934 1934 1935 1935 1935 1935 1935 1935

NOV 21 JAN 04 MAR APR

11 28 07 08 20 26 30 12 18

JUN JUL AUG SEP 11 NOV MAR MAY JUN

AUG SEP

OCT NOV DEC FEB MAR

23 23 09 14 12 29 29 09 15 26 26 28 29 30 09 23 01

07 25 14 22 APR 23 28 MAY 08 11 15 31

JUN 01 JUL 02

09 AUG 17 SEP 24 FEB 04 NOV JAN

FEB MAR

21 21 09 21 04 04 04 18 25 18

19 00 19 05 00 01 20 06 10 22 09 16 13 23 10 03 23 02 18 07 04 19 21 16 03 06 06 13 16 07 23 01 18 05 22 01 19 20 19 02 12 21 06 13 09 00 11 13 22 14 15 16 06 02 08

26 00 19 55 16 50 33 24 24 24 47 23 28 32 16 45 24 30 33 44 34 20 27 52 57 12 24 36 19 55 19 19 14 57 28 13 09 01 55 40 19 42 24 21 35 40 37 41 26 41 18 20 40 51 40

00 52.5 43 13.6 50.3 20.3 40 55 01.4 38.9 10 22.7 16.2 13.0 52.3 06.8 24.3 22.3 45.2 48.2 40.1 43.0 02.1 12.6 24.4 19.3 56.8 44.7 33.5 52.9 53.8 55.1 41.0 41.8 52.4 50.7 48.5 37.9 50.1 41.5 49.8 47.1 42.9 25.7 25.6 26.9 28.3 03.3 30.0 31.3 54.6 08.3 09.8 30.5 47.2

LAT N

LON E

DEPTH KM

OBS

MAG SHIFT MS DIST KM AZIN DEG

40.2 38.22 40.2 40.89 41.50 41.44 35.0 38.5 36.29 39.72 40.8 38.87 39.99 36.99 38.23 35.88 36.43 36.35 35.53 36.71 39.10 40.39 40.75 40.64 40.83 35.94 40.00 35.51 40.55 37.37 34.04 38.84 38.06 36.76 35.09 40.65 40.76 36.35 40.48 40.68 40.43 36.95 37.32 35.65 41.54 34.77 34.60 36.47 33.67 40.76 40.12 40.69 40.33 36.07 36.08

19.6 23.27 19.9 20.60 22.48 22.61 27.0 26.2 22.87 24.83 23.5 23.29 19.94 21.28 20.62 28.65 25.19 26.72 26.70 27.73 22.17 23.81 23.80 23.31 23.46 22.60 23.45 27.24 23.37 27.60 22.15 25.18 20.45 27.17 27.10 23.17 23.67 26.80 23.47 23.83 22.87 20.43 28.90 28.62 19.42 22.73 22.29 25.41 25.89 27.53 27.65 27.54 23.64 24.83 27.30

16 8 8 6 38 6 15 10 103 38 15 77 6 64 11 78 122 85 155 110 51 05 35 16 25 43 81 21 57 83 68 54 59 44 64 74 16 10 98 10 156 83 60 145 10 153 74 132 120 13 12 18 8 67 83

UNS

5.4 5.7 5.0 5.6 6.2 6.8 5.1 5.1 5.4 5.2 5.1 5.0 5.0 5.1 5.4 5.2 5.0 5.3 5.6 5.1 5.7 7.1 5.8 5.8 6.4 5.5 5.2 5.5 5.5 5.0 5.2 5.4 5.1 6.7 5.4 5.0 6.5 5.2 5.0 5.1 5.2 5.1 5.0 5.2 5.6 5.1 5.7 6.3 5.3 6.6 5.5 6.6 5.2 7.1 6.1

153

52 UNS 61 69 118 UNS UNS

34 36 UNS 31 29 21 53 35 14 33 24 18 41 134 58 57 87 50 18 44 53 12 22 53 25 117 37 13 100 ATB

18 25 16 27 16 15 54 24 55 64 25 84 12 81 28 108 60

25.55

14.09

88.29 5.49 55.82 358.28 50.02 10.65 26.49 103.53

206.63 284.03

154.28 226.28 58.03 28.08 14.59 240.71 123.43 81.86 246.15 19.05 65.69 105.63 27.03 49.87 12.05 37.52 33.14 18.14 64.09 29.51 50.11 7.98 30.24 14.42 53.02 40.38

9.40 347.79 340.20 22.36 99.26 333.19 320.16 272.60 4.79 52.91 0.74 0.00 1.82 15.78 233.60 306.69 272.05 19.59 7.97 232.49 347.96 326.73 261.53 317.60 301.89 356.37

17.60 221.76 325.56 8.34 39.96 94.08 19.17 70.32 45.83 79.10 41.33 84.60 57.57 76.83 30.24 17.87 70.01

58.31 7.23 358.06 228.21 26.51 79.50 32.77 25.52 347.19 222.04 358.71 1.72 158.19 2.53 104.95 296.93 22.76

DATE

1935 1935 1935 1935 1935 1936 1936 1936 1936 1936 1936 1936 1936 1937 1937 1937 1938 1938 1938 1938 1938 1938 1938 1938 1938 1938 1938 1938 1938 1939 1939 1939 1939 1939 1939 1939 1939 1939 1940 1940 1940 1940 1941 1941 1941 1941 1941 1941 1941 1941 1941 1941 1941 1941 1941

ORIG.TIME GMT

MAR 31 AUG 20 SEP 03

OCT 22 NOV 07 JAN 14 29 FEB 12 APR 08 15 28 AUG 08 OCT 24 JAN 02 MAY 23 DEC 16 JAN 02 16 FEB 10 MAP. 11

13 MAY 12 JUN 03 JUL 02 AUG

SEP DEC JAN MAY JUN JUL AUG SEP

20 27 15 18 26 02 20 31 02 28 28 09 20 22 06

JAN FEB 01

23 29 JAN 09 MAR 01 MAY 14

16 23 23 23 JUN 23 24 JUL 13 SEP 01

21 NOV 21

03 08 17 07 04 15 15 10 04 16 23 04 14 14 10 17 10 13 20 14 17 22 16 12 00 01 11 03 22 04 09 00 14 10 16 03 00 00 19 06 00 16 18 03 08 01 19 22 23 08 15 15 14 22 12

21 53 35 29 37 11 55 57 17 03 15 12 06 04 57 35 54 36 37 51 45 09 37 26 23 29 02 50 02 36 35 24 11 12 06 30 19 36 04 20 40 07 13 52 36 27 51 34 00 00 15 39 18 40 12

35.4 49.0 39.3 43.3 34.9 25.8 41.0 20.8 09.0 04.0 29.3 57.0 15.0 02.1 28.8 36.9 44 35.0 57.4 06.1 24.2 43.9 56.7 45.3 42.5 18.7 12.3 40.9 30.3 17.9 30.4 05 43.0 53.0 10.6 34.1 33.6 34.2 39.7 06.0 04.3 47.5 35.4 55.2 29.4 58.2 59.5 17.9 47.8 38.5 58 42.7 50.5 31.1 24

TAT N

LON E

DEPTH KM

OBS

41.18 34.81 39.45 40.13 40.82 36.10 42.02 33.94 40.66 37.63 36.15 34.43 36.04 34.04 38.74 36.09 35.4 35.34 34.59 39.23 38.62 35.15 34.49 40.48 38.30 38.32 40.27 38.27 37.53 39.74 40.95 38.0 38.65 35.47 35.06 40.52 38.02 38.78 35.34 41.31 40.59 34.84 38.15 39.73 39.74 39.62 37.15 37.18 37.22 37.95 40.5 38.25 42.17 37.50 39.7

19.88 26.92 20.67 27.18 20.00 22.30 20.10 23.53 23.09 20.38 26.35 26.28 22.54 24.95 27.54 23.75 26.0 27.92 26.15 20.52 20.64 26.24 26.48 27.79 23.66 23.79 20.34 22.47 20.92 27.86 19.69 22.0 22.09 25.21 25.23 19.38 20.86 26.73 25.53 24.43 19.43 25.48 27.29 22.46 22.64 22.41 28.14 28.29 28.35 27.81 21.0 26.46 24.72 28.29 23.8

40 47 106 34 24 74 47 14 15 25 115 103 61 39 8 51 14 131 25 55 14 23 52 6 42 44 52 53 105 100 60 14 148 54 10 8 50 05 55 15 52 43 54 25 35 34 37 47 48 10 15 69 25 70 15

55 22 47 26 43 27 24 29 30 18 25 50 37 43 40 61

154

UNS

21 52 54 59 58 24 12 81 19 32 72 40 UNS

38 UNS

18 22 14 20 61 81 43 14 33 77 26 61 44 35 58 40 12 ATE UNS

49 14 ATE

UNS

MAC SHIFT MS DIST KM AZIM DEC

5.7 5.0 5.4 5.0 5.4 5.2 5.1 5.2 5.2 5.0 5.1 5.5 5.2 5.2 5.6 5.5 5.2 5.2 5.5 5.3 5.8 5.8 5.0 5.0 6.1 5.0 5.0 5.9 5.3 5.7 5.1 5.0 5.2 5.0 5.0 5.1 5.6 7.0 5.5 5.2 5.4 6.1 5.5 6.3 5.3 5.1 6.2 5.7 5.0 5.1 5.0 6.2 5.1 5.3 5.0

44.87 23.89 161.74 15.55 90.64 90.86 54.86 79.43 93.74 42.71 23.58 130.26 15.71 8.11 82.40 66.07

281.67 4.49 5.19 353.26 332.22 232.55 310.73 157.36 175.34 194.47 256.22 15.57 287.16 145.37 2.42 48.77

31.65 24.19 48.49 20.87 39.29 66.07 165.43 13.20 2.39 41.97 116.52 38.42

328.44 191.14 351.77 170.11 5.36 226.48 353.81 270.05 338.60 43.92 268.77 47.88

37.13 116.79 94.51 131.29 87.02 66.39 13.38 28.93 52.38 164.30 81.63 102.89 25.27 26.12 53.29 35.87 15.86 2.39 4.95

359.47 8.35 13.97 29.12 280.28 211.18 220.15 56.25 323.69 201.95 312.16 352.35 22.83 1.38 248.72 201.71 63.34

92.71 66.07

38.61 16.01

DATE

1941 1942 1942 1942 1942 1942 1942 1942 1942 1942 1942 1942 1942 1942 1942 1942 1943 1943 1943 1943 1943 1943 1943 1943 1943 1943 1943 1943 1943 1943 1944 1944 1944 1944 1944 1944 1944 1944 1944 1944 1944 1944 1945 1945 1945 1945 1946 1946 1946 1946 1946 1946 1946 1947 1947

ORIG.TIME GMT

DEC 13 FEB 05 MAY 09

21 JUN 01

01 16 16 21 AUG 12 27 SEP 01

OCT 28 28 28 NOV 15 JAN 07 07 08 11 FEB 14 MAR 25 APR 09 MAY 22 JUN 14 27 JUL 22 OCT 16 NOV 15 20 JAN 05 05 MAY 27 JUN 25 25 JUL 20 30 AUG 09 17 OCT 06 06 07 JAN 08 AUG 27 SEP 02 12 APR 05 12 16 JUL 16 AUG 20 OCT 13 NOV 21 MAP. 21 APR 12

06 01 04 03 09 09 04 05 04 20 06 09 00 02 02 17 11 22 23 11 07 02 19 22 07 10 07 13 11 10 05 07 23 04 06 10 04 17 13 02 07 21 22 16 11 16 20 07 11 05 17 21 01 23 14

16 16 37 42 01 17 47 42 38 38 14 42 31 22 41 01 14 36 56 56 28 51 46 05 47 05 09 08 43 01 05 44 52 16 57 37 00 36 28 34 28 34 42 26 54 29 54 37 43 26 26 24 43 00 05

07.0 01.1 17.3 33.8 18.0 45.0 41.8 35.3 44.2 47.4 16.7 16.1 53.6 52.7 58.0 22.9 46.9 07.6 43.7 20.4 29.3 06.2 49.6 52.7 03.2 42.4 30.2 57.5 08.9 59.4 03 14.1 35.7 29.3 53.2 30.9 45.6 38.2 15.1 48.5 26.2 28.6 23.3 56.7 04.6 34.4 07.0 02.7 56.5 34.5 42.1 42.6 38.9 04.2 13.4

LAT N

37.23 36.87 36.11 W 36.98 38.99 38.98 34.40 40.82 36.05 39.22 41.59 35.19 39.48 39.27 39.48 39.55 37.92 37.52 40.92 36.55 38.22 40.41 34.55 38.36 38.76 35.14 38.84 36.31 36.81 36.55 36.4 36.61 36.22 38.74 38.97 36.06 37.14 35.84 35.67 39.46 39.37 39.40 39.17 36.13 34.43 40.10 35.29 36.72 41.22 34.20 40.77 34.28 38.96 34.92 39.86

LON E

DEPTH KM

OBS

27.99 27.94 26.30 20.18 22.11 22.56 26.29 27.70 26.96 27.79 20.45 26.73 28.11 27.87 27.75 28.58 20.55 21.32 28.10 27.26 20.01 21.89 28.01 20.43 20.42 24.26 20.39 27.89 28.84 28.36 27.4 27.61 27.19 29.00 29.55 27.02 22.27 27.07 26.80 26.43 26.06 26.49 20.47 26.61 28.61 19.81 23.65 26.97 19.86 25.65 19.82 25.81 20.37 23.30 25.01

28 36 137 21 65 68 41 18 88 55 12 22 12 37 43 10 90 81 20 26 16 259 8 76 78 32 15 95 83 35 150 69 91 69 57 53 85 137 98 26 40 16 53 162 62 133 40 78 39 17 48 15 51 21 8

34 23 20 27 24 30 37 41 41 23 45 45 13 26 15

155

ATB

29 26 ATB

16 35 23 23 27 21 31 35 63 14 33 UNS

32 38 51 26 23 35 19 17 76 ATB

27 25 21 68 20 52 34 48 61 32 42 40 40 40

MAG SHIFT MS DIST KM AZIM DEG

6.1 5.1 5.0 5.0 5.3 5.6 5.5 6.0 5.3 5.1 6.0 6.0 5.4 6.0 5.5 6.1 5.3 5.0 5.0 5.3 5.7 5.5 5.0 5.2 5.2 5.1 5.3 5.8 5.5 5.5 5.1 5.6 5.7 6.2 5.5 5.4 5.6 5.6 5.4 7.0 5.1 5.5 5.4 5.0 6.4 5.1 5.6 5.5 5.4 6.0 5.1 5.2 5.5 5.1 5.3

28.08 236.57 58.28 51.73 42.82 38.35 69.46 53.34 55.69 30.72 4.30 147.38 75.08 44.16 57.74

276.99 181.30 38.32 226.55 216.16 158.67 343.82 331.53 225.66 323.43 255.04 204.48 44.47 46.75 21.97

69.11 68.44

356.34 68.82

117.58 114.68 278.47 61.20 64.09 98.52 85.11 19.30 10.99 11.43 55.47

232.43 333.20 15.75 0.86 308.85 329.18 345.09 283.76 185.14 160.33 225.47

30.32 147.27 31.87 22.54 78.11 53.20 64.13 33.43 24.59

38.85 222.70 235.81 261.34 36.96 337.30 53.67 55.16 286.08

18.53 42.88 60.88 27.30 20.28 31.42 141.93 4.12 55.12 48.44 83.18 27.21 22.54 63.18

270.07 344.71 64.93 277.20 304.46 47.13 17.22 303.59 35.99 188.05 310.08 311.74 204.60 233.33

DATE

1947 1947 1947 1947 1947 1947 1947 1947 1947 1947 1947 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1948 1949 1949 1949 1949 1949 1949 1949 1949 1949 1949 1949 1949 1950 1950 1950 1950

ORIG.TIME GMT

APR 19 JUN 01

04 JUL 07

21 AUG 17

30 SEP 13

OCT 06 NOV 29 DEC 09 JAN 17 FEB 09

MAR

APR MAY

JUN JUL

10 11 12 15 06 26 29 29 22 07 22 27 17 30 24 26

AUG 10

SEP OCT NOV JAN FEB JUN JUL

SEP

OCT NOV DEC FEB MAY SEP

27 27 11 20 21 10 18 19 13 14 05 05 17 26 07 23 30 17 04 23 07 12 03 30 23

20 29 11 18 00 29 22 35 09 36 15 04 22 21 15 11 19 55 10 14 23 19 02 26 12 58 15 59 22 31 22 27 17 55 20 12 03 02 02 33 10 22 10 42 14 57 05 07 07 32 06 52 12 21 06 03 11 26 13 27 10 44 11 24 08 52 18 00 17 54 17 43 09 00 03 04 04 44 15 53 00 28 15 24 04 21 05 42 12 21 15 03 17 47 11 30 17 33 16 51 16 13 09 43 07 13 09 52 06 23

44.4 45.3 57.6 44.1 36.3 20.9 41.9 21.9 36.3 04.8 04.6 30.6 17.9 00.2 24 19.6 02.0 59.1 09.5 04.5 48.3 49.7 20.8 56.8 43.9 35.9 21.3 10.9 33.3 10.2 16.8 27.0 44.0 00.5 01.1 10.5 02.0 39.1 58.1 58.7 22.5 22.5 06.1 34.4 15.8 35.2 14.3 15.8 33.9 02.6 39.8 52.0 50.8 42.6 48.5

TAT N

39.33 36.74 40.09 37.37 37.55 37.55 35.50 37.54 36.71 39.23 42.20 38.25 35.32 35.38 35.5 35.91 35.37 35.26 40.60 35.69 35.28 38.73 39.05 34.65 36.53 37.66 38.96 34.49 35.70 38.47 42.06 41.89 37.38 34.60 36.45 35.43 35.73 35.62 41.08 38.76 39.98 38.03 34.42 39.80 35.95 38.71 38.72 37.07 38.63 38.58 34.72 34.40 38.96 35.69 34.90

LON E

DEPTH KM

23.55 30 21.78 62 23.96 45 21.05 18 22.99 60 19.98 13 23.37 34 20.05 15 21.79 2 23.67 15 19.75 50 20.94 68 27.15 25 27.40 57 27.1 15 27.35 70 27.34 58 25.93 48 21.47 39 27.23 89 23.32 47 20.38 12 18.90 10 24.31 38 23.31 162 21.81 53 20.53 36 24.49 20 27.43 45 28.88 79 19.38 41 19.54 20 23.28 88 26.58 74 21.60 59 23.54 43 27.21 43 27.88 86 28.19 28 25.23 12 29.47 35 21.69 57 77 28.32 20.47 52 27.14 67 26.27 17 26.37 48 22.67 42 22.08 111 26.22 25 24.18 19 24.26 29 27.35 60 27.50 50 49 25.81 156

OBS

MAG SHIFT MS DIST KM AZIM DEC

35 52 65 49 29 31 88 36 118 30 22 14 124 28

5.3 5.6 6.0 5.2 5.0 5.1 6.2 5.3 6.7 5.1 5.0 5.0 7.2 5.2 5.0 5.4 5.4 5.2 5.0 5.4 5.3 6.7 5.1 5.5 5.1 5.1 6.7 6.4 5.0 5.1 5.4 5.0 6.2 5.2 5.6 5.6 5.6 5.0 5.6 5.7 5.0 5.0 5.8 5.1 5.2 7.0 5.2 5.0 5.0 5.6 5.2 5.0 5.0 5.0 5.3

UNS

45 46 41 34 50 63 100 35 31 16 34 96 135 21 33 55 UNS 75 42 37 62 58 13 48 40 42 27 65 47 51 124 33 43 31 52 51 17 25 21 87

66.43 29.84 58.94 29.51 103.99 17.60 44.75 16.75 28.60 104.02 127.93 49.53 21.21 23.07

27.13 58.09 22.16 49.52 24.63 353.94 356.49 15.87 221.70 353.80 16.91 276.63 192.83 126.19

47.74 19.92 59.43 87.38 21.88 21.88 21.21 105.95 167.46 112.98 30.24 19.42 10.99 30.87 174.48 41.50

16.57 138.57 30.45 152.87 7.34 339.98 247.96 184.69 26.33 289.28 238.80 341.15 354.74 43.14 2.29 346.05

21.89 51.07 19.42 39.04 26.12 63.29 185.89 7.52 23.38 60.84 17.46 111.71 50.54 13.56 15.39 62.76 28.76 7.30 7.64 36.67 50.50 34.85 22.65

19.53 229.25 151.69 19.14 2.03 77.62 320.37 233.77 330.95 86.64 277.70 354.27 353.81 347.94 24.56 72.25 59.32 252.26 73.09 156.14 37.16 52.13 59.93

DATE

1950 1950 1950 1951 1951 1951 1951 1951 1951 1951 1951 1951 1951 1951 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1952 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953

OCT NOV DEC JAN APR AUG

SEP OCT NOV DEC FEB MAR

APR JUN

JUL AUG SEP OCT

DEC

JAN

FEB

MAR

APR

MAY

ORIG.TIME GMT 22 28 28 09 05 20 24 31 31 15 01 05 13 20 03 09 13 19 25 03 09 12 13 27 08 21 24 23 05 05 07 10 13 22 17 22 31 31 07 07 10 05 07 14 22 18 18 19 19 26 31 01 02 05 01

05 17 22 00 03 22 10 12 20 22 01 13 20 19 20 04 06 01 03 03 14 11 01 13 20 04 20 20 10 10 16 11 16 04 23 23 14 17 00 01 23 22 22 08 18 19 21 12 21 15 00 01 08 03 20

52 53 31 28 15 51 27 29 18 52 26 43 46 12 45 45 30 27 35 20 48 00 07 09 58 18 44 30 21 54 08 51 42 15 04 51 48 18 01 18 29 42 31 43 26 06 18 53 13 10 55 47 21 21 06

11.0 23.0 37.6 02.5 29.4 54.7 34.1 45.4 38.9 12.3 41.4 55 20.5 05.6 01.1 29.9 01.8 27.7 21.4 11.6 43.3 15.6 30.2 23.8 44.1 29.0 29.3 52.0 19.1 57.9 34.7 58.6 32.7 12.1 02.0 47.5 52.8 52.9 28 57 11.9 05 13.2 21.8 23 16.8 11.1 45.2 59.5 30.5 52.3 40.3 46.1 56.1 47.0

TAT N

LON E

DEPTH KM

OBS

MAC SHIFT MS DIST KM AZIM DEC

34.94 39.53 35.63 38.04 37.46 35.06 37.22 35.89 35.51 40.23 34.60 36.0 40.38 38.07 40.47 37.48 41.02 39.61 34.87 38.21 36.94 34.67 37.31 40.68 36.00 35.32 35.35 36.90 37.07 37.41 37.02 37.23 39.18 36.86 34.47 35.28 35.75 35.66 41.3 41.3 38.28 35.7 34.83 36.07 37.7 40.20 40.04 40.00 40.05 39.94 40.51 40.13 38.88 40.61 38.74

26.28 28.19 27.47 20.26 20.30 24.07 21.43 22.45 22.73 27.69 26.62 29.0 26.82 20.05 25.85 20.49 28.14 28.60 23.32 20.49 27.62 26.56 21.98 23.32 21.94 25.45 27.29 29.90 20.92 20.61 20.72 20.61 23.40 27.09 24.22 25.16 25.95 25.97 20.6 20.6 25.23 22.7 24.11 27.04 21.2 27.52 27.52 28.04 27.28 27.48 19.86 27.48 25.32 19.96 26.66

47 49 97 61 41 62 51 30 23 7 49

27 33 16 50 78 74 67 100 68 40 70 ATB, 24 39 25 26 27 116 37 18 19 36 64 41 15 28 41 30 43 106 19 46 55 35 232 24 102 100 UNS UNS ATB UNS 138 129 UNS 259 57 18 50 ATB 48 42 ATB 25 33

4.9 5.1 5.2 5.3 5.3 5.1 5.1 5.6 5.1 5.6 5.1 5.2 5.1 5.3 5.0 5.2 5.4 5.8 4.9 4.9 4.9 5.6 5.3 4.8 4.6 4.6 4.9 5.0 5.0 5.7 4.7 5.2 5.2 5.2 6.6 5.2 5.5 5.7 5.2 5.4 5.0 4.9 5.7 5.3 5.3 7.4 5.7 4.9 5.0 5.1 5.0 5.3 5.0 4.5 4.9

215 27 77 47 11 33 38 54 42 56 55 16 50 62 80 35 24 9 28 9 15 107 17 74 80 54 35 19 20 15 33 96 80 8 28 50 4 10 17 23 10 8 48

157

17.87 48.29 28.85 85.33 34.15 40.32 15.24 53.84 6.43 32.77 16.61

25.20 148.72 59.41 201.72 78.69 356.08 127.55 323.90 279.96 234.48 44.76

105.79 70.66 37.13 73.32 4.02 23.38 26.94 50.64 63.22 36.34 11.85 16.01 22.86 44.59 19.30 35.13 49.09 20.04 53.88 34.64 45.88 74.59 27.30 48.44 36.21 30.72

78.70 249.00 35.24 218.07 56.49 202.16 196.00 297.68 18.10 113.52 276.01 261.75 170.77 162.07 153.82 50.25 167.39 239.34 187.61 209.38 22.27 284.04 286.87 195.29 39.16 53.97

15.24 80.07

3.63 37.51

29.51 20.04 63.45 5.81

40.12 76.62 89.76 342.98

24.59 21.77

209.37 46.72

11.43 35.40

198.72 63.50

DATE 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1953 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954

MAY 02 02 02 14 JUN 03 07 09 13 18 21 23 JUL 22 AUG 09 11 11 11 11 12 12 12 12 12 12 12 12 13 13 17 SEP 05 05 14 OCT 10 16 21 21 21 NOV 03 08 20 28 30 DEC 20 28 JAN 02 18 24 MAR 08 23 APR 17 30 30 MAY 01 01 03 03

ORIG.TIME GMT 05 41 10 06 18 37 13 00 16 05 13 52 16 28 18 38 05 44 08 11 01 53 15 09 07 41 03 32 04 32 12 43 13 11 06 08 09 23 10 07 11 33 12 05 13 39 14 08 16 08 03 22 10 16 02 12 01 08 14 18 14 56 21 29 21 44 11 31 18 39 23 44 22 29 14 45 19 13 20 17 13 21 17 56 02 38 01 13 14 16 13 32 08 17 12 58 20 52 13 02 19 33 15 24 20 53 05 24 08 51

59.3 51.1 45.5 29.8 28.0 57.8 27.8 58 11.6 25 20.8 39.8 12.6 26.7 25 32.1 09.7 11.5 55.4 38 52.3 25.6 28.1 44.1 38.2 10.5 50 28.8 12.9 46.0 17.8 18.2 49.6 10.7 57.2 01 25 54.4 57 36.1 03.9 20.1 49.6 41.3 14.8 54.2 21.9 53.3 51.5 39.5 30 59.3 34.6 55 17

LAT N 38.87 38.61 38.80 38.17 40.19 35.95 39.43 38.1 41.84 37.6 36.06 39.35 38.24 38.35 38.1 38.50 38.25 38.39 38.13 38.1 38.06 37.88 38.09 38.12 38.06 38.29 38.1 38.12 36.96 37.88 38.38 38.08 38.14 38.38 38.30 38.3 37.9 38.98 38.4 37.49 38.32 35.99 38.30 36.98 37.62 37.38 38.06 40.58 37.99 39.23 39.3 37.79 37.81 36.0 36.0

LON E

DEPTH KM

27.04 55 27.16 100 26.72 57 26.61 100 28 28.72 27.11 80 28.14 22 4 22.6 26.54 17 24 20.6 24.69 100 28.24 12 21 20.80 20.74 11 20.8 10 20.53 36 17 20.87 20.59 43 20.74 11 20.8 10 40 20.81 20.76 18 20.81 28 20.84 20 20.84 36 20.88 10 20.8 10 20.99 37 29.35 80 23.17 18 20.78 07 20.98 22 20.70 41 20.70 14 20.59 9 20.8 15 21.2 4 23.99 22 12 20.8 37 20.70 21.60 33 27.77 40 20.56 17 27.12 140 37 21.60 20.46 13 20.61 9 27.12 10 22.98 19 22.28 16 22.2 26 27.07 42 26.95 54 21.5 15 15 21.5

In

OBS

MAC SHIFT MS DI ST KM AZ IM DEC

34 ATE 47 ATB 52 ATE 37 UNS 110 27 70 85 171 244 UNS 53 47 61 257 UNS 69 160 72 95 68 65 UNS 41 ATB 95 73 73 38 79 172 UNS UNS 33 UNS 60 45 ATB 75 ATB 41 25 64 ATE 71 211 UNS 35 60 UNS UNS

5.2 4.8 5.4 5.0 5.7 4.8 4.9 5.1 5.4 4.9 5.8 5.6 6.1 6.8 5.0 5.4 5.1 4.8 7.3 5.5 5.4 6.3 5.8 6.0 5.5 5.5 5.3 5.0 5.1 5.7 5.2 5.3 5.0 5.4 6.4 5.0 4.9 5.0 5.0 5.3 4.8 4.9 5.3 5.2 5.1 4.6 5.2 4.9 5.1 6.7 4.7 5.0 5.5 4.8 5.0

71.18

64.79

43.05

58.58

13.01

325.72

15.24

122.78

17.04

342.23

68.23 306.13 36.08 321.11 6.67 180.00 7.63 316.74 32.85 313.35 8.26 132.28 21.44 298.62 20.16 195.58 27.03 178.11 25.36 237.81 20.04 300.98 20.98 170.04 16.31 295.42 99.04 7.07 14.25

356.23

20.51 10.08 29.51 20.39 13.38 19.05

131.66 348.87 147.09 206.28 315.48 270.07

23.07

233.84

62.64 27.03

205.13 138.77

21.66

270.08

67.76 33.29 6.73

128.42 246.23 7.47

13.20 11.43

35.12 138.35

12.83 13.91

31.67 340.17

DATE

1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1954 1955 1955 1955 1955 1955 1955 1955 1955 1955 1955 1955 1955 1955 1955 1955 1955 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956

MAY 03 04 04 04 12 15 25 JUL 18 AUG 03 05 05 06 06 SEP 02 04 OCT 24 26 NOV 23 DEC 23 30 30 JAN 03 08 28 FEB 21 22 MAR 28 APR 13 19 21 22 JUN 02 JUL 09 16 18 AUG 28 NOV 11 JAN 06 27 MAY 05 15 15 18 JUN 11 JUL 09 09 09 09 09 09 09 09 09 09 10

ORIG. TIME GMT 13 29 16 43 16 45 23 44 02 16 12 24 22 03 14 42 18 18 04 12 20 39 11 33 16 01 01 54 04 19 23 37 10 34 23 22 16 27 02 07 11 05 01 07 07 53 07 42 1946 09 43 14 45 20 45 16 47 07 18 10 02 23 34 23 53 07 07 03 06 13 39 18 27 12 15 01 13 20 42 18 34 22 56 22 08 01 11 03 11 03 24 06 19 06 22 07 36 09 45 11 30 20 13 20 48 21 28 03 01

45.0 26.0 32.7 54 33 34 37.1 37.2 11.8 51 17.2 51 00 38.7 23.4 19.1 28.6 54.3 25.1 26.5 59.8 10.9 09.0 06.2 44 00 52.5 51.3 23.8 18 33.0 39.4 48.5 17.2 11.1 28.8 40.5 46.1 32.1 00.3 16.6 57.3 36.7 31.5 43.7 16.5 16.9 59.0 30.0 10.0 55.7 58.9 08.3 51.6 35.2

LAT N

LON E

DEPTH KM

OBS

MAC SHIFT MS DI ST KM AZ IM DEG

35.28 39.26 39.24 39.3 37.7 36.2 39.26 37.68 40.28 40.2 35.89 36.8 39.8 41.96 36.63 40.46 40.56 35.89 37.87 40.59 36.15 39.19 39.27 33.91 39.4 39.4 37.60 37.29 39.31 39.3 34.75 40.37 40.82 37.68 37.75 37.36 37.54 40.51 36.40 36.99 37.25 37.28 39.03 34.26 36.64 36.45 36.66 36.71 36.27 36.60 36.54 36.62 36.45 36.52 36.82

27.23 22.14 22.35 22.2 21.8 21.7 22.30 21.18 24.28 25.0 27.42 23.2 25.0 19.68 27.10 27.53 27.52 27.60 21.19 22.84 21.79 22.27 22.17 23.54 23.1 23.1 21.24 22.50 23.06 23.0 23.77 25.59 22.42 27.20 27.72 27.02 26.97 26.33 23.75 28.63 20.89 20.95 22.63 26.02 25.91 25.51 25.70 25.60 25.89 25.93 26.32 25.84 26.09 25.81 26.15

12 27 28 20 5 15 22 30 35 26 42 20 28 15 160 10 10 40 38 14 9 41 52 17 4 7 9 19 15 5 46 10 32 31 40 48 10 10 56 40 15 20 52 36 15 95 70 78 30 10 40 14 60 61 55

52 80 71 UNS UNS UNS 91 54 118 UNS 50 UNS UNS 48 ATB ATB ATB ATB 69 39 63 100 56 40 UNS UNS 78 99 139 UNS 46 72 72 232 ATB 41 ATB 134 40 ATB 61 63 69 49 270 57 ATB 50 ATB ATB ATE 61 ATB 46 78

4.9 5.5 5.4 4.8 4.9 5.0 5.3 5.1 5.8 5.0 4.7 5.0 4.8 4.9 4.7 5.0 4.6 5.0 5.4 4.9 5.2 5.6 5.0 4.7 4.7 4.8 5.1 5.2 6.2 5.8 4.7 5.7 5.0 7.0 4.9 5.3 4.7 5.7 4.6 4.7 5.0 5.2 5.1 4.8 7.4 7.2 5.0 5.3 4.8 4.8 4.9 5.3 4.8 4.7 5.5

159

25.08 6.81 15.24

264.92 229.27 117.18

10.54 10.55 38.56

117.20 348.76 53.61

13.38

324.14

19.05

212.62

8.57 17.60 10.99 26.12 17.32 5.64

112.89 306.45 55.57 34.83 62.05 281.35

12.44 10.31 11.64

162.35 262.91 199.05

22.54 18 79 23.38 10.31

284.82 259.49 54.27 360.00

29.59

238.00

13.56 23.07

11.76 270.08

5.62 10.25 15.71 18.40 14.91 26.76

189.04 185.41 282.80 291.92 135.41 220.48

27.12

255.67

16.75

231.45

16.61 16.01

236.58 323.85

DATE

1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1956 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1957 1958 1958 1958 1958

JUL 22 28 30 30 30 30 30 AUG 09 16 SEP 06 06 16 OCT 29 29 NOV 02 20 DEC 02 27 JAN 03 23 FEB 05 09 19 23 MAR 08 08 08 08 11 11 28 APR 24 25 25 26 26 MAY 21 29 AUG 14 SEP 20 OCT 05 08 11 18 30 30 NOV 09 26 26 27 DEC 05 JAN 02 16 MAR 04 15

ORIG.TIME GMT 03 15 05 05 09 09 10 03 00 11 12 18 06 07 16 23 19 10 07 17 17 01 07 22 12 12 20 23 09 13 22 19 02 07 06 16 13 18 02 02 11 07 07 01 01 07 23 08 11 03 13 02 04 11 06

29 19 41 47 15 21 40 37 38 46 58 07 59 35 04 21 41 08 36 26 20 39 44 13 14 21 38 35 31 39 26 10 25 52 33 09 24 39 45 19 36 00 33 50 43 30 55 15 50 08 55 08 18 32 27

06.7 06.0 06.9 22.3 02.0 18.4 05.0 16.1 39.0 43.4 42.8 44.4 00 01.8 36.1 00.5 22.3 10.7 27 58.7 35.3 38.3 00.1 28 18.7 18.7 01.6 17.3 14 36.0 07.4 17.3 45.6 08.3 42.4 07.7 25.2 27.2 00 10 55.0 55.8 04.6 53.3 10.4 27.2 58.5 33.3 12.0 12.1 31.7 22.4 18.7 18.4 11.7

LAT N

LON E

DEPTH KM

OBS

NAG SHIFT MS DIST KM AZIM DEC

36.89 35.06 35.83 35.81 35.85 35.81 35.89 35.62 36.25 35.72 36.03 35.97 35.5 35.80 39.35 39.31 36.58 35.55 38.2 36.89 36.45 36.75 36.27 40.0 39.34 39.34 39.34 39.41 39.5 39.5 39.34 36.44 36.48 36.12 36.37 36.41 39.42 37.62 35.50 38.5 34.57 38.88 39.32 38.34 35.30 35.43 38.57 39.44 39.37 39.37 35.47 36.29 39.48 36.34 40.86

26.32 25.87 26.06 25.98 25.86 25.91 25.91 26.30 21.90 25.90 25.88 25.87 26.0 26.59 23.11 26.15 25.92 28.03 21.3 21.58 28.84 26.44 21.74 20.0 22.68 22.66 22.85 22.76 22.8 22.8 22.68 28.58 28.58 28.60 28.81 28.80 22.81 23.42 28.0 23.0 26.47 20.61 28.19 21.98 27.11 27.68 22.54 22.71 22.64 22.65 27.74 22.37 25.50 27.85 21.28

40 60 20 120 10 10 41 120 15 37 10 29 15 30 5 41 60 10 17 34 70 40 28 12 18 30 23 41 28 21 30 69 66 10 56 10 37 120 15 20 61 84 10 24 66 47 23 57 47 42 40 42 15 120 19

57 ATB 57 ATB 100 ATE 64 ATE 56 76 ATE 55 UNS ATE 83 53 ATB ATB UNS 58 51 ATB 113 UNS 165 155 58 119 UNS UNS 75 255 274 ATB 131 ATB 83 77 UNS UNS 84 39 ATE 55 98 108 42 62 52 111 ATE 94 100 ATB 93

4.8 4.7 5.5 5.1 6.1 5.3 5.3 4.9 5.4 5.7 4.9 5.0 5.0 5.0 5.2 5.4 4.9 4.9 5.2 5.0 5.2 5.0 6.0 4.8 6.5 6.8 5.0 6.0 5.1 4.7 5.1 6.8 7.1 5.0 5.9 4.7 5.4 5.3 4.7 4.8 5.2 5.1 4.9 4.7 5.5 5.5 4.8 5.0 5.0 5.3 5.1 5.1 5.5 5.1 5.1

5.83

17.74

15.71

342.61

10.08

263.03

14.42

11.50

4.62 10.99

76.06 10.27

19.67

263.38

3.75 12.82

27.26 298.25

22.43 23.89

345.76 357.80

16.46

68.86

5.62 2.81 14.76 19.42

322.29 66.67 283.62 357.39

4.78 7.83 2.10

338.86 353.44 58.09

19.18

343.13

2.05 60.48

302.95 332.08

21.77 6.20

312.78 135.79

4.83 19.30 20.40 30.32 15.40 14.08 16.75

133.71 333.81 357.40 22.20 349.85 328.18 12.51

16.16 5.43

20.48 127.86

20.04

59.30

DATE 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1958 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959 1959

APR 03 03 04 24 MAY 03 09 27 JUN 05 10 30 JUL 15 17 AUG 27 30 SEP 02 04 04 NOV 15 JAN 03 06 07 09 11 26 FEB 07 MAR 08 13 29 APR 08 19 25 25 30 MAY 14 14 14 14 20 JUN 09 10 JUL 12 26 AUG 11 16 17 17 18 SEP 01 03 16 OCT 05 07 NOV 06 15 19

ORIG.TIME GMT 02 07 09 08 20 02 18 13 08 08 07 05 15 07 01 00 02 05 07 14 22 01 04 11 20 11 19 23 19 17 00 01 22 00 06 06 19 16 11 04 16 17 23 18 01 04 22 11 04 05 20 08 07 17 14

23 18 18 00 18 40 27 29 28 42 59 37 16 35 13 03 51 42 59 28 22 55 27 38 08 17 08 07 02 39 26 05 44 55 27 36 22 37 21 16 52 07 28 42 33 29 04 37 02 13 34 30 37 08 00

48.4 41.8 56.5 39.5 20.8 56.8 48.0 48.6 57.5 47.1 25.1 11.4 34.6 44.9 25.5 00.5 06.2 40.5 23.9 40.9 03.2 08.2 35.1 43.9 25.7 18.5 11.2 24.5 37.3 04.4 46.5 47.7 39.4 58.0 11.6 59.3 32.6 01.6 19.6 09.0 31.5 06.5 11.6 09.5 18.2 08.4 05.6 46.3 07.4 58.0 10.3 46.7 23.4 47.6 32.0

LAT N 41.19 34.90 41.24 36.76 36.19 36.61 36.86 37.20 41.15 36.44 35.54 40.72 37.45 37.35 37.44 36.54 36.40 37.45 35.26 36.66 36.79 36.15 36.77 36.78 37.56 40.21 34.43 37.39 36.57 37.37 37.03 37.00 36.22 39.95 35.28 35.11 40.17 36.81 36.81 35.67 36.03 40.94 41.31 37.23 40.97 40.92 41.00 40.95 40.78 35.03 40.90 40.97 41.94 37.78 38.98

LON E

DEPTH KM

19.76 29 27.29 40 19.74 37 26.55 10 21.73 16 27.60 67 26.67 163 20.73 29 19.81 41 27.28 112 23.58 38 19 23.39 20.67 9 20.60 11 20.62 13 26.70 35 27.01 140 21.73 31 29.04 80 29.11 30 29.14 26 21.67 16 29.07 61 47 29.02 20.90 50 19.89 47 26.48 29 23.81 61 26.80 160 20.94 87 28.57 35 28.59 35 26.68 100 22.89 9 24.54 73 24.65 23 23.44 97 26.53 62 29.08 20 23.57 37 26.28 80 27.60 9 23.02 43 22.38 63 19.73 15 46 19.69 19.73 7 19.63 26 19.67 22 25.76 55 19.67 27 19.77 28 20.21 17 20.46 20 8 26.55

OBS

MAG SHIFT MS DIST KM AZIM DEG

116 91 36 ATB 107 133 124 72 45 148 88 134 183 56 86 86 ATB 123 ATB ATB 48 70 52 42 59 39 59 49 ATB 66 149 94 ATB 40 50 200 48 42 ATB 130 ATB 77 35 72 147 74 63 175 58 85 101 161 48 269 93

5.4 5.2 4.4 4.8 5.0 5.5 5.1 4.8 4.6 5.3 4.8 5.5 6.5 4.6 5.4 5.0 4.9 5.5 4.8 4.7 4.7 4.9 4.7 5.0 4.6 4.5 4.5 4.6 4.7 5.0 5.9 5.3 4.8 4.6 4.6 6.1 4.9 4.8 4.7 5.1 5.1 5.4 4.2 5.1 5.8 4.8 4.6 6.1 4.5 5.5 5.2 5.7 4.6 6.9 5.3

10.54 15.86 27.65

306.34 282.86 80.49

4.53 21.09 7.45 24.59 37.07 10.77 21.77 13.38 4.41 15.71 5.53 6.67

348.60 336.89 287.34 14.93 62.93 338.01 2.46 11.73 270.00 41.27 232.93 180.02

37.00 220.77 8.39 13.38 14.25 12.24 26.48 3.40 15.71 11.64

301.98 290.81 356.17 299.50 340.11 90.00 14.30 19.52

2.39 10.31 5.63

21.66 43.06 9.08

35.06 290.72 14.25 348.42 7.19 117.66 36.41 349.14 12.05 292.55 13.01

0.00

10.08 11.64 18.14 13.56 38.66 7.36 12.44 4.74 29.51 16.01 10.77 59.67 5.62 8.51

50.49 121.05 17.73 313.83 10.12 232.87 286.97 314.73 237.83 274.24 297.84 312.39 188.98 336.05

DATE 1959 1959 1959 1959 1959 1959 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1960 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961 1961

NOV 27 27 29 DEC 01 08 27 JAN 09 26 FEB 01 22 23 23 23 MAR 12 APR 10 12 25 28 30 MAY 21 26 JUN 09 18 JUL 09 13 AUG 08 27 29 SEP 10 OCT 01 NOV 05 11 18 DEC 29 JAN 07 07 28 FEB 16 21 23 23 27 27 MAR 13 13 MAY 23 25 JUN 21 JUL 12 19 27 AUG 27 SEP 18 OCT 02 NOV 28

ORIG. TIME GMT 00 00 23 12 09 05 03 13 11 21 00 07 07 11 22 04 16 16 10 06 05 09 02 22 13 20 10 18 00 05 20 05 06 18 10 15 07 03 03 21 21 21 21 15 19 02 13 16 02 23 18 22 05 07 08

22 26 49 38 35 22 58 05 59 04 31 34 47 54 05 22 28 33 12 41 10 24 04 42 01 36 17 00 19 30 20 31 03 19 30 52 18 44 02 45 56 40 54 32 17 45 11 04 48 00 35 08 08 21 58

26.9 15.3 48.3 50.9 18.7 51.3 55.2 45.5 47.2 25.7 08.3 38.1 58.1 05.9 33.5 44.9 40.6 28.2 48.7 19.4 16.6 08.5 18.7 57.4 07.1 25.4 23.2 39.6 14.7 46.1 53.8 33.5 57.8 40.5 57.6 59.9 17 46.9 01.3 55.4 53.3 08.2 38.9 01.8 19.3 24.1 47.9 52.5 34.7 58.9 44.8 51.9 35.4 45.1 47.9

TAT N

LON E

DEPTH KM

OBS

MAG SHIFT MS DIST KM AZIM DEG

37.74 37.80 36.05 37.83 36.95 35.16 37.07 37.00 35.27 39.13 39.13 39.09 38.94 41.91 37.79 37.80 38.60 34.51 35.98 37.72 40.56 40.44 34.42 40.74 40.61 35.42 34.58 34.39 34.58 35.38 39.12 38.84 35.17 34.86 35.53 37.70 39.4 40.22 36.50 36.75 36.83 36.68 36.66 36.21 34.57 36.82 36.72 37.93 39.26 37.71 34.83 35.67 34.48 36.66 40.21

20.14 20.16 23.54 20.13 29.00 25.95 28.90 28.93 22.90 20.62 20.57 20.66 20.86 21.00 27.67 27.60 25.34 26.45 26.34 20.21 20.63 20.00 26.21 20.71 23.45 27.20 26.19 26.23 26.23 25.97 20.63 20.81 27.83 22.17 26.09 21.14 22.0 19.87 22.91 27.02 27.07 26.95 26.95 26.43 26.58 28.40 26.66 28.82 23.79 20.18 25.16 23.41 25.82 21.86 26.30

15 10 16 18 53 83 49 72 35 57 51 38 42 24 27 13 12 46 100 26 20 26 52 32 24 63 50 92 17 77 22 31 199 27 84 44 33 37 60 42 32 64 48 10 25 74 60 64 38 22 17 60 36 19 76

92 41 35 130 31 61 80 69 97 41 47 100 68 146 68 50 58 52 ATB 66 194 60 40 50 128 62 84 44 88 77 156 103 53 59 88 76 UNS 57 73 59 38 55 46 ATB 97 212 ATB 60 45 96 54 99 47 138 53

5.4 5.6 4.5 5.4 5.0 5.0 4.9 5.2 5.4 4.6 4.7 5.4 5.0 5.8 4.8 4.6 4.9 5.4 4.7 4.8 6.4 4.8 4.6 4.7 5.4 4.8 5.1 4.6 5.2 5.1 5.8 5.2 4.7 4.9 5.5 4.7 4.9 4.5 4.7 5.1 4.8 5.0 5.1 4.7 5.0 6.4 4.8 5.3 4.6 5.2 4.5 5.0 4.4 5.4 5.2

162

3.77 4.15 27.03 53.16 5.55 39.35 21.21 18.92 8.24 23.48 11.84 14.42 23.98 11.43 14.59 18.66 14.25 29.26

332.21 122.33 282.07 350.42 233.10 322.70 345.05 336.84 262.24 15.25 355.55 35.04 67.65 29.26 324.48 303.75 7.45 354.54

8.93 8.11 11.43 18.27 15.24 8.74 15.55 16.46 48.49 16.31 16.46 4.22 7.83 27.91 33.58 12.44 10.77

354.35 46.76 18.76 28.04 23.92 50.54 334.49 290.73 323.74 328.20 336.20 37.81 6.35 263.14 254.59 320.75 158.33

20.75 187.28 21.10 336.86 6.23 270.00 36.54 297.48 32.55 358.41 20.63 279.67 15.55 14.25

325.91 336.32

29.02 32.70 5.28 22.75 10.08 17.04 4.79 71.65

300.44 58.84 90.01 4.71 360.00 307.85 338.14 11.69

DATE 1961 1961 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1962 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1963 1964 1964 1964

DEC 10 11 JAN 10 19 19 26 MAR 18 26 APR 04 04 10 10 11 16 16 17 17 19 28 28 MAY 01 08 JUN 28 JUL 06 06 10 AUG 28 SEP 10 OCT 04 26 DEC 13 JAN 31 FEB 15 22 MAP. 04 11 17 29 APR 28 MAY 06 15 JUN 04 JUL 08 10 26 26 SEP 18 24 29 OCT 02 NOV 12 DEC 16 JAN 10 30 31

ORIG.TINE GMT 08 16 12 19 22 08 15 09 20 20 21 22 10 00 07 11 11 02 11 12 11 23 06 09 15 10 10 09 19 11 22 15 10 14 15 07 14 03 00 19 11 22 16 07 04 19 16 02 13 21 07 13 03 17 09

39 53 36 38 18 17 30 22 51 59 37 10 47 15 19 15 33 05 19 43 53 53 51 16 54 06 59 36 46 26 45 07 18 12 10 27 17 09 41 30 15 11 02 19 17 46 58 10 35 05 06 47 34 45 23

11.6 13.7 35.7 02.7 28.0 39.8 33.0 12.6 05 41.5 10.3 50.0 29.3 16.9 06.0 30 55.2 57.2 02.9 52.0 59 59.0 07.7 17.1 25.9 02.4 57.4 28.7 12.1 11.8 34.7 06.3 25.7 54.8 20.8 24.3 24.0 14.6 52.2 32.6 42.3 35.0 35.4 41.3 16.1 39.1 13.5 45.8 49.2 16.5 35.8 57.4 24.0 57.0 15.5

LAT N 34.56 36.42 35.82 38.35 38.38 35.32 40.69 38.44 34.6 34.41 37.76 37.79 37.65 37.70 36.15 37.60 37.78 37.74 36.20 36.13 38.20 35.23 40.76 37.79 37.79 38.42 37.80 34.74 37.93 33.52 35.22 35.94 40.15 40.34 34.96 37.96 39.35 40.54 39.32 39.32 41.56 38.92 36.63 39.80 42.04 36.84 40.71 40.91 36.44 35.02 35.48 36.97 38.70 37.41 37.68

LON E

DEPTH KM

25.60 51 23.44 75 22.48 77 22.25 35 40 22.15 22.78 11 19.59 15 20.86 67 25.5 20 25.16 47 20.09 5 20.13 11 20.16 6 46 20.12 27.23 140 20.10 25 20.09 33 42 20.26 26.84 56 26.87 51 20.50 90 24.12 79 20.69 40 20.12 37 20.31 6 25.92 10 22.88 95 45 26.62 22.36 53 27.55 11 27.97 65 22.02 52 19.89 31 20.11 30 25.18 39 29.14 40 41 20.89 26.46 2 27.82 30 20.34 53 49 20.13 46 20.54 27.82 78 23.90 127 21.43 14 28.76 80 29.02 48 28.90 11 29.00 60 23.49 58 29.61 83 20.96 15 40 21.00 59 29.89 13 22.51

OBS

NAG SHIFT MS DIST KM AZIM DEG

57 80 48 90 63 198 187 93 UNS 87 196 60 146 81 ATB UNS 85 65 173 151 UNS 79 95 168 56 ATB 226 156 123 102 59 64 64 104 134 74 94 69 ATB 60 73 90 80 ROT 192 ATE 184 71 ATB 67 97 162 19 123 17

4.7 4.9 5.0 5.3 4.9 5.8 6.0 5.1 4.7 4.9 6.3 5.1 5.4 4.8 5.2 4.8 5.2 4.5 6.0 5.5 4.9 4.8 5.0 5.8 4.4 4.8 6.6 5.4 5.0 5.5 4.7 4.8 4.6 5.1 5.3 5.5 5.1 5.1 4.6 4.5 4.5 5.0 4.7 4.6 6.1 5.0 6.3 4.8 4.8 4.5 5.1 5.8 4.6 5.5 4.0

40.32 1.32 6.65 70.45 5.61 233.50 22.51 210.50 34.21 10.41 11.21 27.12 5.18 257.59 49.62 22.87 17.73 3.77 12.24 4.93 46.56

15.44 207.78 218.45 116.81 256.29

14.92 16.16 16.89 2.11

61.59 30.77 16.14 58.26

6.35 314.41 7.13 200.74 3.68 287.55 6.25 79.76 2.39 201.57 13.01 337.57 6.72 7.49 7.29 242.80 7.54 35.06 13.01 79.25 27.91 143.89 12.24 125.46 18.15 5.85 3.76 152.27 8.19 132.73 31.41 41.05 48.04 263.50 19.30 161.81 2.82 113.18 27.03 315.16 4.12

90.00

14.42 6.88

222.94 14.14

21.88 12.44 10.99

7.40 346.21 214.52

DATE 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1964 1965 1965 1965 1965 1965 1965 1965

FEB 18 23 24 24 MAR 30 31 APR 08 11 15 17 20 25 29 29 MAY 13 14 18 JUN 08 12 JUL 04 17 18 AUG 17 24 25 25 25 25 25 27 28 29 31 SEP 13 18 30 OCT 06 06 07 13 17 20 NOV 05 DEC 01 09 09 15 31 JAN 02 07 09 10 17 29 FEB 06

ORIG. TIME GMT 08 22 23 23 03 09 14 16 20 18 18 12 04 17 17 17 20 16 07 11 02 03 00 21 11 07 08 11 14 19 12 19 19 22 00 04 14 14 23 10 09 08 20 10 18 19 21 16 13 10 04 08 03 23 03

35 41 21 30 27 33 12 00 54 11 37 44 21 00 06 00 03 49 46 11 34 40 17 42 11 08 05 42 37 31 06 37 35 53 08 39 29 31 07 30 50 47 55 21 28 06 03 18 47 22 11 02 39 39 47

15.0 03.9 13.0 28.0 13.3 12.3 28.5 43.0 27.4 39.6 32.6 15.0 05.1 01.3 14.8 27.8 14.2 03.5 21.0 17.9 26.7 19.4 48.5 46.2 52.0 14.9 01.8 55.8 33.6 59.7 18.4 55.2 39.0 22.9 47.6 45.4 57.9 23.0 53.9 09.2 28.0 56.0 45.8 03.3 46.0 21.4 15.7 02.2 43.4 17.2 51.0 51.7 32.5 02.5 57.8

TAT N 37.80 39.21 38.10 39.09 34.94 36.43 35.04 40.30 39.04 38.20 35.09 35.46 39.25 39.14 36.28 38.52 36.95 36.26 37.34 41.96 38.05 36.13 35.28 40.51 35.75 35.50 35.28 35.35 35.55 35.56 37.80 35.29 36.10 41.71 35.69 34.51 40.24 40.30 40.19 36.94 35.02 40.00 35.11 38.53 41.57 41.20 40.02 35.76 36.46 36.50 36.00 38.70 34.58 34.91 35.41

LON E

DEPTH KM

23.70 52 23.73 10 24.00 16 23.80 41 24.02 65 28.78 57 24.29 64 24.83 33 44 23.71 17 20.30 24.46 68 27.70 61 23.72 20 23.55 15 82 28.21 20.44 36 24.29 109 28.26 62 29.93 5 23.43 2 23.63 155 99 26.01 25.90 64 41 19.20 28.84 51 28.76 28 28.67 55 28.58 12 28.82 35 28.84 38 19.95 61 28.72 35 20.20 21 20.60 00 40 29.07 23.26 49 23 28.16 34 28.23 31 28.36 28.29 76 25.43 18 28.60 00 24.13 27 22.45 48 20.92 78 20.92 55 28.79 26 25.51 89 26.10 59 26.85 35 27.40 63 46 22.00 27.83 29 27.60 25 27.04 71 164

OBS

MAC MS

11 131 14 59 54 34 119 136 52 25 30 67 137 99 27 17 13 28 27 66 241 139 95 23 125 31 38 47 70 113 55 42 21 21 95 92 151 210 45 10 117 10 40 15 66 41 43 110 12 79 17 18 33 48 59

4.4 5.4 4.6 4.7 4.6 4.5 5.1 5.6 4.4 4.4 4.4 4.7 5.5 5.0 4.4 5.0 4.3 4.4 4.6 4.8 6.0 5.2 4.6 5.0 5.3 4.5 4.4 4.6 5.6 5.4 4.6 4.7 4.9 4.9 5.3 4.9 5.1 7.0 4.4 4.3 5.0 4.8 4.7 4.7 4.4 4.7 4.5 5.2 4.9 4.7 4.3 4.3 4.6 4.7 4.7

DATE

1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1965

FEB 09

ORIG.TINE GMT

09 20 MAR 02 03 08 09 09 09 09 09 09 10 10 13 13 13 14 15 19 19 22 31 31 31 APR 03 03 05 07 09 10 19 27 29

20 23 22 22 01 23 17 19 21 18 22 22 01 21 04 04 15 06 23 04 23 03 09 12 20 05 14 03 04 23 00 06 14 09

MAY 01

01

02 07 13 16 29 29 JUN 03 10 29 JUL 06 06 10 13 AUG 04 14 23 24 24 25

22 14 21 01 01 04 18 15 15 03 13 08 14 19 04 14 01 23 04 04

SEP 11

38 32 47 00 37 02 57 46 20 37 19 35 36 50 08 09 42 04 08 35 37 22 47 01 08 19 30 12 16 57 19 46 09 46 59 33 42 09 35 47 14 31 24 40 18 34 09 19 15 47 08 11 57 57 49

41.7 56.4 08.6 07.2 18.3 55.9 54.5 58.7 04.5 54.6 06.4 15.3 05.8 19.8 40.6 37.9 16.5 49.3 30.9 45.4 31.9 22.2 26.3 11.7 25.5 18.0 48.2 54.6 39.6 02.0 59.7 33.7 05.6 56.8 43.9 25.4 21.7 16.7 56.0 48.0 56.1 51.0 17.1 31.5 42.1 14.8 46.1 01.0 04.6 51.7 58.6 07.2 35.4 45.7 12.8

LAT N

37.92 37.79 38.40 38.47 38.27 37.85 39.34 39.12 39.19 39.28 39.17 39.26 39.08 39.35 39.11 39.03 39.14 39.90 39.16 41.50 41.39 39.13 38.38 38.47 39.20 37.70 38.24 37.75 37.10 35.06 34.90 34.56 35.63 37.14 37.18 35.61 36.74 39.22 35.26 35.13 35.19 39.72 36.44 34.20 38.37 34.73 34.73 37.50 35.30 38.45 40.51 35.67 40.39 34.72 39.07

LON E

DEPTH KM

20.25 08 20.85 23 22.10 06 28.33 42 28.47 42 21.00 55 23.82 18 23.86 19 23.87 07 23.93 33 23.96 13 23.84 18 23.77 18 23.94 37 23.97 11 23.68 33 23.90 18 20.20 05 24.00 33 23.10 12 22.88 33 23.84 01 45 22.26 22.23 78 24.10 33 23.80 15 20.50 25 22.00 34 22.30 36 24.31 39 24.37 55 28.36 33 23.53 37 08 26.89 26.91 15 23.52 56 26.86 162 20.73 58 41 27.85 22.64 56 22.57 43 23.21 33 26.64 142 26.23 33 22.40 18 25.64 61 07 23.30 27.80 35 26.50 52 21.60 30 26.17 33 54 23.50 26.20 18 25.08 10 22.09 42 165

OBS

MAG MS

54 28 21 115 18 24 215 66 50 85 30 60 101 34 62 78 23 9 24 23 17 38 279 27 32 9 66 218 25 210 47 24 182 56 48 41 30 20 80 33 69 107 50 67 244 37 30 22 35 24 170 56 48 95 31

4.8 4.9 4.3 5.6 4.5 4.6 6.3 5.0 4.8 5.0 4.6 4.9 5.1 4.4 4.9 5.3 4.6 4.5 4.7 4.4 4.4 4.6 6.6 4.9 4.7 4.3 4.6 6.0 4.3 6.1 4.7 4.4 5.5 4.8 4.7 4.6 4.4 4.4 4.6 4.6 4.7 4.8 4.5 4.6 6.4 4.7 4.3 4.4 4.6 4.3 6.1 4.7 4.7 4.8 4.3

DATE

1965 OCT 11 18 1965 1965 28 1965 28 1965 NOV 02 1965 28 1965 DEC 04 1965 07 1965 07 08 1965 1965 13 1965 20 1965 20 1965 22 1965 25 1965 25 1966 JAN 02 1966 14 1966 15 1966 16 1966 17 1966 17 1966 18 1966 20 1966 26 1966 30 1966 31 1966 FEB 04 1966 05 1966 05 1966 05 1966 08 1966 08 1966 09 1966 10 1966 11 1966 12 1966 14 1966 14 1966 17 1966 19 1966 MAR 08 1966 11 1966 14 1966 29 1966 APR 01 1966 03 1966 07 1966 11 1966 13 1966 14 1966 21 1966 MAY 04 1966 04 1966 07

ORIG. TIME GMT

06 14 04 14 03 05 16 01 08 11 17 00 00 08 12 15 23 18 18 20 08 20 21 00 13 06 04 08 02 02 02 20 13 05 13 06 13 17 20 10 10 18 20 14 00 13 11 03 06 20 18 06 06 21 13

37 32 27 39 27 26 39 00 25 22 44 08 30 43 15 10 12 39 07 15 39 04 20 39 30 47 30 38 01 11 58 08 16 36 21 49 36 57 16 41 22 51 01 08 08 15 36 25 43 44 51 45 36 49 08

03.0 48.3 12.9 28.5 07.4 05.3 57.5 57.0 03.2 05.0 08.4 16.0 57.6 44.5 33.1 30.0 18.0 31.0 46.5 30.0 42.6 58.6 02.6 00.6 28.0 03.0 57.0 03.0 45.3 08.0 01.2 04.0 22.2 23.1 45.9 37.0 22.2 50.1 58.0 25.8 27.0 47.5 45.0 41.2 42.8 05.2 26.1 45.0 46.4 08.7 44.0 26.9 59.0 01.8 16.9

LAT N

LON E

DEPTH KM

42.00 38.83 38.41 41.67 39.48 36.12 34.26 36.30 35.60 37.30 40.25 40.21 40.01 37.10 39.84 37.31 37.67 34.72 36.72 35.61 40.09 38.12 35.12 39.20 38.94 38.87 39.05 34.37 39.10 39.17 39.11 41.08 36.23 41.11 38.95 39.15 38.83 34.94 38.82 38.89 39.04 38.87 34.40 39.07 37.00 38.72 38.94 37.83 35.61 36.80 34.55 34.49 38.94 37.74 37.75

21.50 27.83 22.37 19.30 25.32 27.43 26.25 27.00 27.50 28.50 19.82 24.82 24.80 28.10 25.00 21.06 23.18 27.00 23.09 25.80 20.57 22.00 23.49 24.44 21.47 21.65 21.90 23.94 21.74 21.89 21.91 24.97 28.11 24.92 21.70 21.45 21.43 27.11 21.42 21.88 21.65 21.42 24.23 21.36 26.80 21.49 21.53 21.14 27.08 28.50 23.86 25.69 21.47 27.71 27.79

05 36 29 28 05 73 12

07 33 42 41 04 12 22 37 47 46 62 60 12 46 48 51 33 16 21 50 21 79 48 39 24 46 43 39 38 08 44 30 45 33 45 34 25 00 00 14 51 27 37 09

OBS

36 31 24 94 209 68 4 4 7 45 175 31 9 31 28 92 54 60 73 29 47 47 49 36 43 24 94 261 39 130 105 62 14 31 29 55 115 52 18 16 65 126 62 15 91 134 106 12 3 83 99 141 126 146

MAC MS

4.6 4.6 4.3 4.3 5.0 5.6 4.5 4.5 4.8 4.7 4.6 6.0 4.7 4.7 4.7 4.3 4.7 4.4 4,7 4.5 4.7 4.4 4.4 4.4 4.6 4.6 4.4 4.7 6.2 4.9 5.0 4.7 4.4 4.3 4.3 4.3 4.9 4.8 4.3 5.3 4.4 4.7 5.0 4.6 4.5 4.7 5.2 4.8 4.6 4.8 4.8 5.1 5.2 5.2 5.3

DATE

1966 MAY 09 1966 09 1966 10 11 1966 1966 11 1966 12 1966 13 14 1966 1966 15 1966 16 22 1966 24 1966 24 1966 24 1966 1966 25 1966 JUN 02 1966 04 1966 05 1966 11 1966 11 1966 13 1966 19 1966 24 25 1966 1966 28 1966 29 1966 30 1966 JUL 12 1966 15 1966 19 1966 20 24 1966 1966 31 1966 31 1966 AUG 06 1966 07 1966 09 1966 10 11 1966 1966 11 1966 16 1966 21 1966 SEP 01 1966 01 1966 06 1966 10 1966 22 1966 23 1966 27 1966 OCT 21 1966 22 1966 29 1966 29 1966 30 1966 NOV 09

ORIG.TIME GMT

00 06 18 10 15 20 13 23 10 17 07 09 11 17 09 22 06 20 10 12 04 17 22 06 17 00 19 02 23 02 10 01 04 11 18 14 03 15 00 04 03 01 14 12 12 10 20 23 10 16 05 02 12 02 15

42 53.0 08 29.6 44 38.0 21 41.8 06 02.5 31 02.5 11 50.9 00 44.7 11 08.0 30 56.1 37 29.0 39 26.5 09 25.4 43 32.3 06 57.0 51 28.0 16 57.5 52 02.5 21 55.4 05 02.7 59 24.0 55 30.0 34 26.1 20 46.9 01 04.0 49 35.0 21 29.0 56 22.0 50 12.1 52 33.0 16 06.0 27 39.0 22 17.0 03 21.0 32 32.0 30 46.0 34 15.1 22 40.2 23 40.8 34 13.0 53 41.7 30 43.5 22 56.9 35 34.0 31 57.3 55 16.7 14 39.4 4758.1 54 53.0 17 04.0 38 24.0 39 24.8 13 06.8 10 14.0 12 28.0

LAT N

34.43 34.31 36.5034.30 34.37 38.56 34.47 37.00 35.17 34.48 38.70 37.33 37.37 34.87 40.32 38.50 36.63 37.24 38.84 37.37 38.30 38.55 38.73 38.54 39.00 41.29 41.18 35.50 38.90 38.30 38.83 38.98 35.70 41.20 37.90 36.34 40.22 36.40 37.65 38.74 40.16 40.33 37.46 38.03 36.66 36.53 39.83 38.60 36.98 39.53 41.96 38.90 34.74 38.75 39.18

LON E

DEPTH KM

26.44 13 43 26.44 27.40 94 26.40 06 26.42 39 25.82 33 26.47 37 40 22.02 27.16 34 26.46 41 27.92 23 34 21.89 22.02 43 24.62 43 19.82 21 27.23 30 20.97 82 21.94 35 21.50 43 21.08 47 28.50 00 27.35 09 21.53 34 26.90 00 27.00 49 20.47 16 20.85 19 22.49 07 21.65 34 27.10 00 21.39 22 21.94 15 71 22.30 21.20 31 22.20 25 49 22.31 19.86 38 22.22 39 20.99 48 21.76 06 19.75 20 27.40 12 22.16 15 22.81 39 26.63 158 26.90 146 23.92 35 47 21.73 24.16 42 22.11 57 23.09 13 01 21.10 64 27.54 21.58 26 20.54 35 167

OBS

NAG MS

206 88 9 22 92 54 86 71 61 91 57 128 99 63 82 43 125 47 109 91 10 82 99 8 10 43 42 144 40 9 64 17 17 10 43 50 92 80 73 84 113 154 198 47 28 33 19 31 26 64 28 266 42 72 57

5.9 4.7 4.3 4.7 4.7 4.5 4.6 4.5 4.4 4.6 4.8 4.9 4.9 4.7 4.7 4.5 4.9 4.3 4.8 4.7 4.7 4.8 4.8 4.4 4.5 4.2 4.3 5.4 4.2 4.5 4.3 4.3 4.6 4.6 4.3 4.6 4.9 4.6 4.6 4.6 4.9 5.5 5.4 4.6 4.5 4.5 4.6 4.5 4.9 4.6 4.7 5.8 4.6 4.7 4.5

DATE

1966 1966 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967

NOV 19 DEC 18

JAN 01 04 04 FEB 09 14 20 28 MAR 04 04 28 APR 04 04 MAY 01 01 01 01 01 02 02 03 04 05 09 14 15 30 JUN 01 07 11 12 12 12 12 18 20 JUL 05 06 13 19 19 20 25 25 31 AUG 09 15 28 SEP 03 05 06 07 08 08

ORIG.TIME GMT

07 07 22 05 07 14 07 09 14 17 18 00 16 03 07 09 08 09 14 01 08 18 13 06 08 04 08 23 10 15 05 02 01 11 18 05 16 00 08 14 09 16 19 11 12 07 00 04 17 07 08 04 00 02 09

12 42 17 58 10 08 22 11 21 58 38 04 59 47 09 50 15 47 38 27 11 41 31 26 00 15 12 53 39 54 35 51 29 00 12 28 37 53 21 38 06 18 03 03 39 12 33 35 36 46 31 59 32 04 51

38.0 20.0 52.0 52.5 14.0 18.2 24.0 38.0 51.3 09.0 01.0 28.0 06.2 17.0 03.0 08.2 46.9 40.0 02.0 20.4 55.9 47.2 07.8 37.9 47.3 59.9 57.9 31.6 23.5 36.0 05.0 05.8 09.5 16.0 46.6 53.9 23.4 16.8 51.3 58.4 22.2 32.0 30.4 54.0 28.0 05.0 15.0 52.9 41.0 21.8 02.2 23.0 22.0 45.0 42.8

LAT N

35.03 35.10 37.80 38.37 38.29 39.92 38.80 34.68 37.53 39.25 38.99 38.44 35.59 40.32 39.60 39.51 39.75 39.46 39.36 39.56 39.45 39.53 39.63 39.56 39.72 37.70 34.53 34.17 36.81 34.78 38.14 38.15 38.08 38.04 39.06 36.78 38.23 36.73 36.67 40.66 38.10 38.03 40.72 37.80 37.90 40.60 36.98 36.54 36.73 38.23 36.72 35.06 40.75 40.60 39.08

LON E

DEPTH KM

23.46 17 26.92 33 20.00 5 22.04 1 22.13 24 20.26 1 27.70 0 24.74 48 21.18 46 24.60 60 24.80 15 25.42 29 23.56 73 26.20 32 21.29 34 21.30 33 21.42 38 21.23 10 21.31 21 21.20 35 21.29 39 21.34 37 21.26 39 21.29 57 21.39 53 21.17 48 26.64 35 28.67 35 29.26 43 26.68 52 22.91 40 22.77 35 22.90 47 22.75 05 21.27 46 29.32 35 20.77 39 21.50 50 21.43 43 19.67 73 28.87 41 20.95 06 19.88 58 28.60 75 28.70 101 27.62 4 28.40 64 19.28 33 26.74 169 22.00 45 29.33 24 23.09 20 19.58 13 20.08 01 21.40 40

OBS

NAG MS

176 88 18 172 34 207 36 24 85 329 55 76 93 24 301 110 46 35 49 47 40 117 72 80 55 132 178 59 148 51 71 160 78 21 72 50 32 140 64 62 105 29 58 13 12 36 19 51 67 29 22 104 35 110 65

5.2 4.7 4.8 5.5 4.3 5.6 4.7 4.4 5.0 6.8 4.7 4.6 4.7 4.0 6.2 4.9 4.7 4.4 4.4 4.3 4.4 5.3 4.7 4.9 4.7 4.9 5.2 4.4 5.0 4.7 4.4 5.0 4.4 4.3 4.6 4.2 4.4 4.9 4.6 4.7 4.9 4.3 4.4 4.5 4.5 4.4 4.2 4.8 4.7 4.4 4.6 4.8 4.3 5.3 4.4

DATE

1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968

SEP 12 24 26 27 OCT 05 11 22 24 26 NOV 05 06 13 18 26 30 30 30 DEC 01

01 02 02 02 02 03 04 05 06 07 14 14 19 29 30 JAN 09 FEB 07 19 19 19 19 20 20 20 20 20 20 20 20 20 21 21 21 22 22 24 26

ORIG.TIME GMT

14 22 05 07 12 07 05 06 04 00 10 06 02 03 07 07 08 18 20 12 00 09 14 17 00 05 00 18 02 08 08 19 21 23 22 22 23 23 23 00 01 02 02 06 09 09 16 21 00 07 12 02 04 12 05

46 11 05 24 00 48 38 14 55 26 32 50 31 24 23 42 13 30 07 44 24 27 18 59 48 20 01 03 54 35 32 49 27 15 22 45 09 12 53 39 28 21 29 15 35 41 50 05 17 18 35 16 57 55 43

42.0 20.4 37.4 34.0 53.7 45.0 04.7 44.7 39.3 13.8 58.0 34.9 36.0 57.4 50.4 52.0 17.5 57.1 51.0 42.0 13.0 08.0 04.0 25.0 51.0 03.1 56.0 35.0 54.0 23.7 32.3 24.1 20.3 42.8 19.0 42.4 46.4 32.0 51.0 15.7 29.0 52.0 28.0 46.0 51.6 09.0 44.8 23.6 28.0 50.0 55.3 39.0 47.0 03.0 30.4

LAT N

39.23 40.86 41.53 34.42 37.74 36.07 36.90 38.91 37.22 38.12 39.05 37.78 35.25 39.40 41.41 41.43 41.40 41.37 41.28 41.32 41.31 41.20 41.29 41.25 41.17 36.53 41.30 41.27 34.49 34.74 41.49 41.41 40.66 35.52 36.65 39.40 39.36 39.62 39.55 39.73 39.40 39.56 39.30 39.30 39.41 39.35 36.15 39.25 39.56 39.30 39.61 39.66 39.39 41.44 39.39

LON E

DEPTH KM

21.46 25 19.70 35 20.94 39 26.60 49 20.80 37 27.12 34 21.10 05 37 21.96 29.05 46 20.34 33 20.61 01 28.83 34 23.05 34 20.49 37 20.44 21 20.49 21 20.50 30 20.27 16 20.28 28 20.29 16 20.34 08 20.08 19 20.29 42 20.20 25 20.66 10 26.85 137 20.40 42 20.24 32 26.27 57 24.61 45 20.43 29 20.27 46 21.47 34 22.54 46 26.74 153 24.94 7 24.70 15 25.50 15 25.30 33 25.37 37 46 25.60 25.45 8 24.90 33 25.50 32 24.88 33 24.95 33 27.39 64 25.05 33 24.97 2 25.00 6 25.30 5 25.72 6 25.02 19 20.18 24 24.79 5

OBS

MAG MS

56 74 49 80 145 46 24 41 150 31 44 36 97 51 312 62 18 24 39 172 54 33 28 24 19 83 30 33 85 36 110 101 32 69 146 333 25 34 36 88 18 90 8 30 98 116 121 23 22 18 27 43 78 25 12

4.7 4.6 4.3 4.6 5.1 4.5 4.9 4.4 5.1 4.7 4.6 4.5 4.7 5.1 6.5 4.7 4.4 4.6 4.7 5.4 5.5 4.6 4.4 4.3 4.4 5.9 4.4 4.7 4.5 4.6 4.9 4.9 4.6 5.0 5.8 7.2 4.6 4.5 4.6 5.1 4.2 5.5 4.6 4.2 4.8 5.0 5.0 4.8 4.6 4.3 4.6 4.6 4.5 4.4 4.3

DATE

1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968 1968

ORIG.TIME GMT

FEB 27

MAR

APR

MAY JUN

JUL

AUG SEP

OCT

NOV

27 29 29 06 10 10 11 16 21 21 23 23 28 28 05 08 18 24 28 30 12 24 04 08 08 09 13 25 27 31 31 04 15 05 15 16 18 28 03 06 10 11 17 19 21 28 31 03 03 04 10 10 11 11

13 13 11 12 05 06 07 17 18 09 16 17 17 07 16 15 08 03 08 21 17 09 10 21 17 18 15 19 22 02 09 19 23 02 18 04 02 04 00 18 15 05 03 23 15 18 12 03 04 18 20 12 14 23 23

20 37 46 47 14 48 10 32 11 42 09 16 25 39 37 54 59 08 18 31 40 05 17 47 41 18 00 34 05 45 21 29 24 29 42 55 55 01 53 18 06 16 02 56 34 16 54 22 49 44 05 50 29 34 53

15.7 45.4 42.0 33.5 49.0 17.1 59.0 46.9 05.8 51.0 23.8 35.8 55.0 59.5 47.3 32.7 09.0 03.4 03.3 41.3 26.0 04.0 31.0 53.6 06.4 11.4 47.4 07.0 29.0 51.0 56.0 29.7 22.2 43.1 32.0 58.4 52.0 59.0 28.0 34.8 43.0 26.0 36.0 04.0 54.0 41.0 30.0 14.0 33.7 08.0 59.0 37.0 33.0 21.5 07.0

LAT N

LON E

DEPTH KM

OBS

MAC MS

39.59 39.61 39.50 39.12 39.34 39.10 39.13 39.50 39.38 38.80 39.76 39.78 39.76 37.84 39.49 39.76 39.68 41.25 39.33 38.78 35.45 35.30 38.00 37.76 34.47 34.29 34.39 35.56 40.95 35.43 37.84 35.54 37.81 35.18 36.30 34.70 38.05 34.74 40.49 40.13 36.96 36.50 36.54 38.21 35.24 35.25 38.89 36.62 42.10 38.60 36.44 34.44 34.55 36.61 36.61

25.51 25.51 26.00 24.32 25.04 24.36 24.23 25.56 24.94 27.60 25.49 25.64 25.48 20.89 20.38 25.55 25.50 20.22 24.88 23.57 27.88 27.89 20.80 23.23 25.08 25.20 25.10 28.05 20.09 27.92 21.14 28.00 21.02 26.70 26.70 25.05 20.66 25.01 26.38 19.85 26.38 29.20 25.87 20.17 23.40 23.35 25.82 27.01 19.35 28.70 26.98 23.77 23.86 27.15 27.10

36 35 5 18 10 33 9 5 43 52 19 5 33 23 18 18 9 36 20 10 27 16 42 20 38 57 49 0 23 29 34 49 62 48 1 17 11 30 28 58 17 0 33 17 6 1 4 2 28 56 35 1 5 23 33

19 67 19 34 29 72 167 36 86 13 53 31 127 255 129 50 15 54 227 33 222 77 31 226 194 44 80 7 79 213 58 126 53 159 24 144 23 96 65 22 99 15 26 81 133 106 67 159 214 15 55 39 30 22 50

4.3 4.7 4.0 4.3 4.4 4.4 5.4 4.3 4.5 4.4 4.8 4.3 5.3 5.9 5.3 4.1 4.2 4.3 5.5 4.2 5.9 4.6 4.3 5.5 5.5 4.4 4.6 4.5 4.5 5.2 4.3 4.7 4.6 5.1 4.5 4.9 4.4 4.6 4.7 4.7 4.7 4.7 4.4 4.5 4.9 4.9 4.7 5.4 5.4 4.3 4.5 5.1 4.3 5.0 4.1

170

DATE

1968 1968 1968 1968 1968 1968 1968 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969

ORIG.TIME GMT

NOV 12

12 DEC 04 04 05 21 25 JAN 10

13 13 14 31 31 FEB 13 17 21 26 MAR 03 05 22 23 24 24 24 24 24 25 25 25 25 25 26 27 28 28 APR 02 03 06 08 09 14 16 16 16 17 21 24 27 30 MAY 01

01 02 03 03 13

03 06 18 19 07 00 12 04 05 07 23 14 15 15 09 18 12 00 14 18 21 01 02 08 11 12 13 13 13 14 16 03 18 01 10 04 22 03 15 16 05 04 22 23 00 20 14 10 20 18 20 18 03 20 17

37 08 43 37 52 36 17 32 46 57 12 40 34 09 11 39 35 59 41 00 08 59 58 13 34 13 21 21 28 18 13 31 07 48 02 57 12 49 48 27 11 54 55 21 54 36 45 58 20 02 06 38 25 31 48

39.0 55.6 28.0 22.0 11.1 40.0 19.1 03.4 40.4 07.6 06.2 04.0 28.0 32.0 46.0 57.0 49.1 10.5 16.4 55.0 42.1 34.0 49.0 05.4 34.0 17.0 12.0 34.2 50.1 52.1 30.4 26.5 03.0 29.5 17.4 30.0 21.9 33.9 50.4 49.0 45.5 12.8 40.5 06.2 38.2 40.0 48.8 26.0 32.0 16.4 45.4 15.0 36.3 14.4 02.1

LAT N

LON E

DEPTH KM

OBS

MAG MS

36.74 36.64 36.34 36.50 36.60 36.60 34.99 39.23 38.31 34.57 36.11 34.29 39.10 34.70 34.11 39.14 36.66 40.09 40.06 39.10 39.14 39.11 39.15 39.02 39.17 39.08 39.06 39.25 38.78 39.17 39.08 39.03 39.12 38.55 39.13 38.13 40.66 38.47 40.67 38.16 38.90 35.30 35.32 35.23 35.19 39.42 36.35 36.54 39.12 35.41 35.39 34.25 35.21 35.17 39.03

27.11 27.16 26.98 27.02 26.92 27.07 24.31 19.97 22.52 24.93 29.19 26.14 20.43 22.30 25.31 21.87 27.18 27.50 27.56 28.67 28.48 28.51 28.60 28.41 28.70 28.65 28.41 28.44 28.51 28.49 28.44 28.27 28.20 28.46 28.45 20.12 19.98 26.41 19.77 19.99 21.79 27.90 27.77 27.72 27.83 25.09 28.73 28.21 28.52 27.68 27.73 26.21 28.03 27.76 28.57

26 24 43 32 31 30 58 37 46 60 22 31 04 25 26 33 33 6 33 28 9 30 4 43 37 20 28 37 40 34 42 37 51 4 37 20 21 16 17 11 36 55 52 58 55 1 53 33 8 51 67 38 81 53 35

104 92 52 87 206 88 156 44 75 56 263 78 37 28 33 51 38 225 92 37 256 156 19 55 72 34 104 197 25 120 65 56 25 296 124 38 197 229 128 28 82 143 173 181 132 83 79 72 141 180 145 68 48 52 42

5.0 5.0 4.4 4.7 5.6 4.9 5.1 4.4 4.9 4.4 5.9 4.9 4.6 4.6 4.7 4.6 4.3 5.9 4.7 4.7 5.9 5.1 4.4 4.7 4.6 4.7 5.0 5.8 4.9 4.9 4.7 4.6 4.4 6.4 5.0 4.4 5.6 5.9 4.9 4.4 4.5 4.9 5.3 5.3 4.9 4.7 4.7 4.7 5.1 5.3 4.7 4.4 4.6 4.7 4.6

171

DATE

1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1969 1970 1970 1970 1970 1970 1970 1970 1970 1970 1970 1970 1970

ORIG.TIME GMT

MAY 14

JUN

JUL

AUG

SEP

OCT

14 15 16 16 07 12 12 13 14 14 15 16 17 19 25 03 04 08 11 20 24 13 14 26 04 06 22 28 02 07 07 12 13

DEC 01

19 20 21 23 27 28 31 31 JAN 24 FEB 11

17 17 20 22 22 MAR 03 04 17 23 29

10 23 12 05 07 15 15 18 01 13 14 05 16 05 06 06 09 10 08 01 15 23 04 21 02 19 20 08 22 23 05 18 13 01 20 23 17 22 02 07 22 05 05 15 19 00 04 20 15 15 16 01 17 20 14

05 57 05 09 27 31 13 00 23 47 32 58 06 18 52 11 42 13 09 45 51 21 06 51 15 25 30 17 54 13 09 49 34 02 18 54 40 01 13 31 02 08 37 43 01 16 51 19 48 52 35 51 00 56 37

17.1 35.5 56.8 34.4 01.1 09.0 30.9 30.8 14.6 26.4 57.4 43.2 25.6 43.0 36.7 51.8 02.0 52.0 13.0 26.0 56.5 19.3 03.0 05.3 37.1 26.6 40.3 43.4 08.0 40.6 12.0 02.6 19.9 30.8 03.8 40.5 36.3 06.8 49.0 54.5 35.6 10.1 05.6 54.0 18.9 28.3 10.3 32.0 31.0 17.1 46.2 30.7 56.8 01.0 19.6

LAT N

35.33 39.15 35.28 35.00 39.13 37.85 34.43 34.23 34.35 34.34 34.34 34.30 38.11 38.23 34.29 35.98 38.41 35.32 37.50 35.32 37.94 34.93 38.37 39.52 41.73 35.11 36.73 36.57 34.30 38.47 39.20 39.16 39.76 39.78 34.85 38.92 36.59 36.66 39.37 39.22 40.67 34.26 34.44 37.21 37.59 39.34 38.83 36.55 35.21 35.38 38.28 34.47 41.40 39.04 38.74

LON E

DEPTH KM

27.72 43 28.49 36 27.73 46 24.51 51 21.82 39 20.19 9 25.04 22 25.22 63 25.14 41 25.05 21 25.26 50 25.13 35 20.58 40 20.21 11 25.23 49 27.60 48 22.05 28 27.89 30 20.31 30 28.10 40 20.41 38 26.00 60 21.75 24 27.87 21 20.03 28 27.17 43 28.35 72 28.01 86 25.15 29 22.29 45 28.40 13 28.54 49 20.55 46 20.59 27 24.22 35 22.00 65 23.46 90 28.42 69 23.80 6 42 23.82 19.62 51 26.37 51 54 26.11 23.45 105 22.67 79 20.62 53 21.68 22 27.26 20 25.24 43 25.27 34 20.74 49 26.48 44 21.07 43 20.49 7 27.83 56 172

OBS

MAG MS

181 28 143 70 153 104 288 53 89 154 43 67 82 57 45 54 71 33 212 20 64 81 66 56 118 83 137 42 203 50 148 32 163 236 136 65 65 47 19 44 44 22 108 42 125 89 68 39 58 75 44 60 43 119 94

5.3 4.6 4.9 4.6 5.1 4.6 6.2 4.9 4.7 5.1 4.4 4.6 4.6 4.4 4.6 4.7 4.5 4.7 5.8 4.4 4.5 4.5 4.5 4.7 5.0 4.9 5.1 4.7 5.5 4.7 5.0 4.5 5.1 5.7 5.3 4.3 5.1 4.6 4.9 4.6 4.6 4.5 5.1 4.7 5.0 4.6 4.6 4.9 5.3 4.9 4.3 4.7 4.6 5.0 4.4

DATE

1970 MAR 29 30 1970 1970 APR 05 1970 07 1970 08 11 1970 16 1970 1970 20 1970 23 1970 23 24 1970 1970 MAY 08 1970 12 1970 24 1970 JUN 08 1970 09 1970 19 1970 27 1970 30 1970 JUL 02 1970 02 1970 03 1970 11 1970 13 1970 AUG 08 1970 18 1970 19 1970 29 1970 SEP 01 1970 03 1970 18 1970 24 1970 27 1970 28 1970 OCT 01 1970 01 1970 08 1970 10 1970 11 1970 31 26 1970 1970 NOV 30 1970 DEC 28 1970 28 1970 29 1970 29 1970 29 1970 30 1971 JAN 02 1971 02 1971 03 1971 17 1971 18 1971 19 1971 FEB 03

ORIG.TIME GMT

14 06 04 09 13 01 22 15 04 09 14 18 22 11 06 20 22 18 18 07 14 00 23 00 12 17 02 10 01

05 16 21 15 19 22 22 22 13 02 16 01 09 03 17 00 12 21 18 00 03 23 05 10 23 18

40 46 55 18 50 03 39 39 29 01 37 30 49 03 51 43 27 57 21 50 12 41 29 46 13 40 01 42 06 32 53 25 56 54 21 38 14 48 35 07 57 49 42 00 49 47 03 54 46 25 18 18 35 33 28

26.6 24.9 39.5 44.0 28.3 11.3 31.3 31.6 48.2 26.6 20.0 42.7 03.2 01.0 03.0 30.2 01.3 15.0 22.0 14.0 55.9 00.0 19.6 45.0 19.8 17.9 51.6 17.2 40.0 10.2 38.0 15.0 35.5 09.0 56.9 37.2 22.4 26.0 29.0 39.4 39.7 02.3 15.0 46.0 04.0 10.0 38.0 44.0 15.9 36.0 43.1 47.0 50.0 56.7 12.8

LAT N

LON E

DEPTH KM

OBS

MAG MS

38.73 39.09 34.68 34.57 38.34 38.17 40.67 38.27 37.51 39.13 36.75 38.67 38.21 36.05 41.44 36.16 39.48 41.49 38.80 38.72 38.65 38.77 38.86 38.73 37.79 39.16 41.08 41.49 38.94 39.60 34.33 34.17 39.18 37.09 38.04 38.02 38.10 38.07 38.04 42.10 34.50 39.06 37.06 35.92 35.05 35.05 36.03 36.97 35.12 37.07 34.63 38.08 37.51 34.30 38.53

28.00 29.03 25.07 26.14 22.56 22.77 23.45 22.66 22.73 28.65 28.66 22.30 22.55 25.49 20.40 25.56 20.56 19.39 20.57 20.59 20.21 20.42 20.57 20.56 21.80 21.78 19.77 19.45 20.21 28.78 26.26 26.18 20.40 28.59 22.85 22.77 20.29 20.19 20.25 19.35 24.05 21.94 29.02 28.21 23.32 23.36 28.34 28.94 23.17 29.04 26.32 20.51 20.40 24.06 21.67

47 23 35 20 23 55 20 38 74 28 34 58 39 37 29 63 58 48 22 27 17 24 36 19 77 38 21 33 7 22 12 42 53 24 35 43 46 35 15 39 47 38 7 28 36 49 26 23 42 07 47 29 40 34 39

46 57 68 111 281 82 159 193 133 208 61 70 146 26 31 44 77 79 89 109 20 82 76 84 51 60 207 45 132 167 62 21 53 36 115 131 86 73 71 75 87 46 27 65 52 37 39 51 95 52 220 19 43 143 37

4.4 4.4 4.5 5.0 6.2 4.4 5.0 5.3 4.9 5.4 4.6 4.4 4.9 5.0 4.4 4.4 4.5 4.5 4.6 5.9 4.7 4.9 4.5 4.5 4.4 4.5 5.3 4.4 4.8 5.1 4.7 4.3 4.8 4.4 4.9 5.3 4.6 4.4 4.4 4.6 4.7 4.4 4.4 4.6 4.5 4.7 4.6 4.7 4.6 4.3 5.4 4.4 4.4 5.0 4.3

173

ORIG.TIME GMT

DATE

1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972

FEB 09

11 23 MAR 03 09 15 18 24 25 30 30 APR 09 19 22 MAY 01

JUN JUL AUG SEP

OCT

NOV

DEC

JAN

FEB

MAR

APR

05 26 05 07 03 16 08 11 03 09 11 26 29 03 04 13 16 04 12 22 27 02 17 18 12 20 20 02 13 13 16 20 28 04 16 25 31 31 23 26

21 16 19 19 04 15 16 05 15 00 19 22 02 09 13 01 07 19 13 04 05 19 05 13 06 02 05 21 23 16 03 09 14 12 19 03 09 02 02 13 00 02 21 11 13 00 21 10 01 03 06 02 20 05 06

20 57 41 01 58 23 08 11 26 30 40 09 43 28 45 15 09 55 34 05 50 39 37 17 51 03 44 02 19 35 26 45 25 30 26 54 40 06 33 51 52 15 19 27 07 42 38 52 09 35 16 58 32 13 30

35.3 09.0 23.0 01.3 41.3 19.8 02.1 10.0 34.1 13.6 13.3 21.5 50.5 27.8 27.4 35.0 26.0 52.0 19.1 55.4 23.9 28.7 27.3 00.7 09.1 11.5 31.7 34.3 41.2 09.5 26.1 35.8 49.2 50.9 45.7 28.4 58.4 04.6 29.7 20.0 19.4 06.9 51.7 39.8 12.0 24.9 38.8 47.5 37.3 35.9 08.8 08.0 01.2 33.2 23.2

LAT N

38.13 39.82 39.62 36.45 38.74 37.29 36.32 37.89 34.43 38.73 38.98 34.76 38.81 41.89 40.95 41.87 37.10 38.40 34.32 35.15 35.11 38.44 36.81 36.81 38.21 38.87 37.83 37.02 34.10 34.16 34.24 36.63 35.26 36.61 35.34 39.75 39.23 34.94 36.76 35.01 36.64 36.64 38.78 36.07 36.97 37.03 36.84 37.06 36.78 37.89 36.67 36.43 36.62 38.20 39.43

LON E

DEPTH KM

22.77 40 20.92 32 27.32 10 67 22.29 20.44 36 41 24.14 26.98 141 20.37 6 24.14 44 20.50 38 20.79 46 24.23 42 20.54 08 20.38 40 27.99 13 20.28 11 21.70 33 21.86 02 42 22.80 40 27.89 23.07 39 21.69 36 23.96 109 28.79 0 20.16 03 22.31 5 21.99 48 23.28 60 26.08 35 26.18 17 26.06 17 28.54 61 22.88 41 27.09 23 27.81 34 25.66 24 26.45 35 23.96 25 23.02 41 23.61 46 27.15 16 27.23 34 21.32 62 23.98 77 24.08 27 24.17 24 21.75 63 24.09 31 23.11 53 23.43 142 27.51 55 21.26 19 27.09 18 20.78 46 26.36 18 174

OBS

NAG MS

67 29 214 52 108 78 81 112 70 32 72 81 156 97 133 68 20 29 67 116 83 50 131 22 28 58 45 44 111 103 183 55 66 55 100 61 32 104 76 149 79 83 72 42 51 49 25 19 23 63 32 132 86 82 144

4.4 4.4 5.3 4.3 4.7 4.7 4.3 4.6 4.6 4.4 4.7 4.6 5.2 4.7 4.6 4.4 4.9 4.3 4.7 4.5 4.6 4.3 5.1 4.6 4.3 4.4 4.3 4.4 4.7 5.0 5.1 4.9 4.5 5.3 4.9 4.6 4.4 4.9 4.6 5.1 4.6 4.9 4.5 4.3 4.4 4.3 4.3 4.7 4.3 4.3 4.3 4.7 4.3 4.6 5.1

ORIG.TIME GMT

DATE

1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1972 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973

APR 26 MAY

JUN

JUL

AUG SEP

OCT

NOV

DEC

JAN

FEB MAR APR

MAY JUN

29 04 08 23 05 09 15 05 08 25 12 29 03 06 13 16 16 17 17 18 23 26 10 10 15 16 23 30 05 15 17 20 24 28 02 05 14 17 19 05 10 16 23 26 20 26 12 06 07 16 19 22 22 12

15 18 21 09 03 10 07 00 18 05 01 23 02 08 18 04 03 14 14 14 08 01 12 04 19 22 23 09 14 19 12 02 03 03 13 13 12 17 12 19 05 03 22 11 07 05 22 20 14 19 00 22 13 15 11

59 29 39 20 14 44 42 33 04 46 56 47 48 38 12 13 53 06 07 44 20 53 16 31 23 02 39 56 32 25 21 42 30 48 26 28 00 50 44 34 49 24 45 46 50 55 23 30 13 30 05 13 39 26 01

44.9 38.3 57.2 55.5 29.9 59.6 20.5 24.9 57.9 15.3 08.5 57.9 36.9 46.3 27.4 19.7 26.4 26.7 15.3 10.4 24.9 16.5 59.4 40.3 38.7 54.3 37.4 27.5 10.7 42.6 47.4 35.8 27.2 34.2 11.8 22.8 15.0 21.7 30.7 30.0 17.6 12.0 17.1 43.0 11.0 15.0 11.8 43.9 57.3 09.0 42.2 55.0 44.4 07.0 52.3

LAT N

LON E

DEPTH KM

39.45 34.80 35.15 41.69 41.50 37.83 34.73 38.34 36.96 41.56 38.73 41.09 37.00 39.16 35.54 37.96 40.28 41.35 38.35 38.39 38.26 42.25 34.25 35.24 35.18 37.99 38.24 37.78 38.28 35.03 34.10 37.39 39.42 39.39 33.80 35.28 39.14 37.99 34.27 35.29 35.80 37.69 35.11 34.28 35.74 34.38 39.84 35.86 34.41 41.47 34.64 38.29 35.07 36.70 34.18

26.33 24.66 23.56 23.64 23.64 21.38 26.55 22.20 21.88 23.68 21.47 22.69 29.14 27.98 25.60 22.38 19.73 20.68 20.27 20.36 20.20 25.31 26.15 25.42 25.51 21.03 20.39 26.32 20.35 24.77 26.30 20.33 21.68 20.43 27.77 27.06 23.64 20.39 26.22 27.74 21.91 21.42 22.68 24.98 22.08 23.88 20.30 21.81 25.18 19.90 25.01 26.94 23.45 22.10 26.15

25 48 13 12 4 57 40 33 51 38 49 12 0 30 86 75 15 6 33 39 14 24 23 33 41 66 34 28 13 31 0 41 26 09 02 36 39 10 38 40 34 45 35 37 41 19 44 45 37 20 44 17 46 0 47

175

OBS

MAG MS

146 178 332 168 45 2 177 5 37 39 108 108 27 118 46 344 165 86 284 62 75 89 151 92 37 103 48 35 198 198 11 90 99 209 81 168 56 66 82 120 256 148 125 101 123 101 67 114 199 88 131 68 118 38 63

4.9 5.3 6.4 5.1 4.3 4.3 5.0 5.1 4.6 4.7 4.7 4.6 4.3 4.6 4.4 6.2 5.1 4.4 5.9 4.6 4.3 4.6 5.1 4.6 4.4 4.4 4.3 4.3 5.4 5.3 4.3 4.3 4.9 5.4 4.7 5.3 4.4 4.3 4.6 4.7 5.5 4.9 4.6 4.7 4.9 4.5 4.4 4.7 5.3 4.5 4.5 4.3 4.5 4.3 4.3

ORIG.TINE GMT

DATE

1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1973 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974 1974

SEP 12 OCT 06 10 13 14 19 NOV 04 04 12 12 14 17 19 20 29 DEC 05 24 JAN 24 27 29

19 12 12 08 09 21 11 06 18 00 15 16 00 00 09 15 07 13 10 03 13 09 21 15

FEB 01

00 01

05 23 MAR 08 09 12 13 22

15 01 02 04 18 17 17

APR 01

00

07 09 19 18 22 09 14 20 05 11 13 17 18 28 20 25 09 14 14 14 23 23

14 17 22 08 23 02 16 23 11 05 18 05 09 01 11 11 06 13 14 15 07 18

JUN 26 JUL 14

21 AUG 08

MAY JUN JUL AUG

SEP

OCT NOV

05 38 51 23 36 19 05 00 07 16 52 11 07 11 33 37 28 02 57 50 53 40 06 12 05 28 33 12 21 20 02 22 22 02 01 26 30 32 05 52 34 12 24 10 07 34 25 43 00 22 26 29 52 46

23.4 19.2 55.0 48.7 50.5 59.0 34.8 35.0 06.4 06.5 12.6 38.7 11.3 49.4 57.4 20.8 59.9 34.2 44.3 50.4 54.8 17.5 17.4 44.8 02.2 25.0 47.0 52.8 07.5 34.7 45.2 20.0 39.3 48.7 24.0 09.7 11.4 12.1 15.4 20.1 40.7 37.4 57.0 57.4 31.8 02.0 59.1 50.3 35.5 45.0 34.7 46.6 46.8 28.2 36.0

LAT N

34.36 37.93 34.94 41.69 40.72 34.80 34.34 34.70 34.68 37.01 38.87 38.85 35.35 35.40 35.29 35.88 35.34 39.31 35.18 35.36 35.08 38.23 35.04 38.29 38.55 36.74 38.02 34.66 34.59 36.76 34.60 40.65 35.61 34.75 36.62 35.47 38.45 41.25 36.57 35.44 38.23 35.71 40.03 40.48 40.29 40.21 34.87 39.57 34.67 38.92 38.50 38.48 38.50 39.77 39.74

LON E

DEPTH KM

50 26.13 21.21 42 24.72 33 19.43 39 21.01 91 26.34 39 28.45 63 52 26.39 51 26.31 53 21.71 20.54 13 20.49 35 27.74 47 27.65 21 42 27.74 45 21.99 27.71 60 0 23.80 37 23.81 26.42 70 27.69 53 20.13 56 25.38 35 21.85 34 24 27.22 26.86 156 40 22.00 24.74 47 42 24.80 26.40 45 24.75 46 20.55 27 22.44 58 24.70 38 27.22 26 26.31 84 20.43 24 23.05 08 28.48 49 64 23.04 20.65 44 24.75 53 19.64 28 23.39 8 20.63 17 20.78 3 23.86 38 18.83 33 23.37 41 20.32 24 23.08 27 23.01 6 23.15 35 18.81 38 18.94 49 176

OBS

MAC MS

158 138 73 89 75 112 78 99 152 39 277 118 160 193 102 53 118 134 309 204 68 84 119 66 176 145 82 119 96 113 144 100 112 204 44 238 138 159 195 53 37 118 59 91 187 56 57 163 107 83 185 182 174 36 83

4.9 4.6 4.4 4.5 4.4 4.7 4.6 4.6 4.8 4.3 5.9 4.9 4.7 5.3 4.5 4.4 4.7 4.6 5.9 5.2 4.3 4.5 4.7 4.3 5.4 5.3 4.4 4.7 4.4 4.9 4.6 4.4 4.5 4.7 4.3 4.9 4.7 5.1 5.0 4.3 4.4 4.4 4.5 4.4 5.0 4.3 4.3 5.0 5.0 4.9 5.0 5.1 5.0 4.3 4.7

DATE 1974 1974 1974 1974 1974 1974 1974 1974 1974 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975

NOV 29 DEC 01 02 14 14 18 20 20 26 JAN 03 08 08 09 11 24 25 26 26 FEB 02 09 15 20 28 MAR 17 17 17 17 25 27 27 27 30 APR 01 04 05 23 24 MAY 03 11 13 19 19 JUN 02 07 08 30 30 JUL 25 29 AUG 21 SEP 12 13 16 16 17

ORIG.TIME GMT 06 12 23 02 21 21 15 16 14 01 19 19 18 18 16 14 05 06 21 12 10 13 19 02 05 05 05 02 05 06 19 13 08 05 03 01 22 03 23 00 03 23 03 17 17 13 18 19 15 15 13 14 05 18 23

35 09 02 36 29 30 09 02 01 59 32 58 53 06 33 14 30 24 12 36 23 55 51 06 11 17 35 52 15 15 42 03 20 16 30 08 58 16 11 22 26 25 19 36 22 26 40 17 07 29 10 30 06 45 04

33.4 29.5 19.0 37.7 22.0 54.8 32.6 06.2 51.1 44.4 34.1 16.0 44.3 55.0 04.4 05.0 52.0 42.7 20.2 05.0 21.0 35.9 09.0 39.1 16.5 47.1 17.6 52.6 07.9 46.0 42.5 17.6 02.0 16.5 24.0 08.0 16.6 02.1 47.9 53.0 20.4 40.9 08.0 36.9 28.3 54.6 32.0 11.9 12.8 18.5 19.6 37.6 19.1 48.2 07.2

LAT N 35.40 39.48 38.42 38.19 38.40 39.95 39.64 39.71 35.10 35.62 38.24 38.10 34.78 34.76 41.14 37.84 36.72 38.75 40.48 38.71 35.77 38.54 40.66 40.48 40.48 40.40 40.48 34.66 40.45 40.41 40.48 40.57 38.53 38.11 36.27 40.40 37.48 37.70 37.36 38.19 38.34 39.61 36.47 34.32 34.60 38.49 38.45 38.41 34.84 40.14 36.27 38.47 41.54 41.52 36.37

LON DEPTH OBS E KM 27.89 26.35 22.31 20.75 20.40 23.86 20.53 20.74 22.75 27.34 22.65 22.75 24.03 23.98 19.77 20.01 24.44 20.13 21.39 26.16 26.95 20.39 22.52 26.03 25.95 26.24 26.08 23.69 26.12 26.23 26.08 26.36 23.25 21.98 21.68 26.04 22.60 21.18 23.84 22.72 22.34 19.74 26.52 26.22 23.45 21.62 21.61 21.87 24.95 19.80 21.90 22.02 19.33 19.28 23.06

49 36 34 32 37 33 47 47 40 42 26 33 41 42 46 1 32 0 40 27 46 4 29 2 22 5 18 0 15 22 5 0 8 56 58 20 68 0 43 45 26 47 31 51 47 3 41 38 47 46 43 40 25 46 35 177

107 95 128 243 122 46 159 46 57 156 246 110 140 41 111 62 152 22 69 79 132 59 87 114 219 138 252 44 337 100 80 64 44 290 38 69 164 48 81 105 153 33 92 61 67 230 84 176 169 43 212 150 217 79 201

MAG MS 4.6 4.5 4.9 5.4 4.5 4.4 4.8 4.3 4.3 4.9 5.7 4.5 4.6 4.3 4.5 4.6 4.9 4.3 4.4 4.5 4.7 4.4 4.5 4.6 5.0 4.9 5.8 4.4 6.7 4.7 4.6 4.4 4.4 5.7 4.3 4.4 4.9 4.3 4.7 4.6 4.7 4.5 4.7 4.5 4.5 5.1 4.6 4.9 4.8 4.4 5.0 4.9 5.1 4.6 5.1

DATE 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1975 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976

SEP 17 20 22 23 OCT 02 06 12 16 25 28 NOV 12 13 13 17 22 30 DEC 06 08 10 16 17 21 21 21 24 31 31 31 31 31 31 JAN 01 02 03 03 03 03 10 14 18 21 FEB 01 01 02 10 18 22 22 22 22 23 23 26 MAP. 02 APR 04

ORIG.TIME GMT 23 05 00 21 15 21 08 17 07 02 09 03 23 14 10 04 08 23 18 08 02 15 16 21 17 06 09 14 13 15 22 00 22 05 13 13 15 07 10 15 22 14 23 12 09 11 12 22 22 22 16 17 19 19 22

44 22 44 34 59 27 23 45 25 43 03 07 30 36 06 20 19 03 12 08 52 37 07 05 04 34 45 53 51 14 54 04 44 54 16 50 03 11 31 10 18 46 33 13 52 41 02 01 54 56 18 12 32 41 26

19.0 18.2 56.4 14.1 45.1 54.0 12.6 49.3 22.3 23.8 48.8 20.5 36.0 41.0 08.4 46.8 10.0 38.0 28.3 29.4 17.2 16.6 51.1 15.0 51.8 04.0 47.3 42.0 21.0 36.2 50.0 06.0 42.0 35.1 27.4 08.0 53.8 20.0 02.3 28.4 00.2 07.0 08.6 01.0 09.2 37.9 53.0 48.8 34.8 34.2 28.0 18.8 38.1 34.1 27.4

LAT N 38.16 34.60 35.20 36.60 40.16 34.13 37.91 38.28 37.61 35.34 36.28 33.42 37.51 34.29 39.92 37.02 38.50 36.43 34.14 39.44 34.09 35.62 38.47 38.38 36.80 38.42 38.52 38.45 38.48 38.38 38.56 38.42 38.42 38.37 38.41 38.36 38.39 36.80 38.39 38.81 37.76 36.12 36.60 39.78 36.82 38.70 39.38 39.39 39.39 39.33 38.27 34.90 38.24 40.66 34.83

LON DEPTH OBS E KM 20.42 15 26.41 60 26.26 55 26.76 158 20.49 45 25.22 24 23.12 35 40 21.95 22.11 36 23.19 67 28.15 64 22.84 0 21.09 50 23.34 2 20.11 34 21.25 52 25.69 23 27.90 5 44 25.72 20.45 50 26.20 42 26.78 98 2 21.67 21.85 0 21.77 65 21.70 28 21.67 19 21.70 26 21.65 23 21.76 0 21.69 29 21.72 18 21.78 0 21.54 27 21.81 14 21.77 2 21.79 37 27.92 31 21.95 10 5 20.51 21.02 33 22.28 60 67 22.20 20.60 36 27.93 39 48 20.44 22.08 19 22.13 34 22.14 23 21.91 69 4 25.58 70 26.90 26.38 10 19.59 11 26.42 36 178

113 89 312 86 30 80 159 40 53 31 263 203 47 64 223 47 43 18 56 26 44 62 242 41 67 53 295 80 117 54 46 122 90 33 81 35 78 70 70 254 42 50 42 43 76 87 234 143 146 31 177 33 57 191 44

MAG MS 4.5 4.9 5.7 4.6 4.1 4.3 5.0 4.0 4.3 4.0 5.5 5.3 4.0 4.1 5.3 4.3 4.0 4.1 4.3 4.4 4.4 4.4 5.5 4.2 4.3 4.1 5.5 4.5 4.6 4.2 4.2 4.7 4.6 4.2 4.5 4.0 4.5 4.5 4.6 5.7 4.2 4.3 4.2 4.4 4.7 4.5 5.1 4.8 4.8 4.3 4.8 4.1 4.4 4.7 4.2

DATE

1976 APR 19 1976 30 1976 MAY 01 1976 06 11 1976 11 1976 13 1976 13 1976 1976 13 1976 15 1976 15 1976 18 1976 30 1976 JUN 05 05 1976 10 1976 1976 11 1976 12 1976 12 1976 12 1976 13 1976 15 1976 15 1976 20 1976 21 1976 25 1976 JUL 02 1976 08 1976 13 18 1976 1976 18 1976 23 1976 02 17 1976 1976 18 1976 18 1976 19 1976 19 1976 22 1976 22 1976 23 1976 SEP 12 1976 15 1976 30 1976 30 1976 OCT 02 1976 17 1976 21 1976 23 1976 27 1976 27 1976 28 1976 31 1976 NOV 09 1976 11

ORIG.TIME GMT

00 16 07 17 16 17 00 20 22 02 03 08 16 20 22 05 18 00 02 04 00 00 12 04 10 07 05 15 20 02 13 20 05 17 00 17 01 22 13 17 03 00 03 00 17 12 21 12 12 00 09 01 08 16 17

27 09 26 59 59 10 44 44 18 47 03 30 26 30 21 55 26 59 41 54 20 07 46 51 59 01 16 20 37 17 30 51 15 37 58 06 12 36 28 18 15 42 36 33 09 45 26 48 08 38 28 04 59 02 08

50.5 30.2 27.0 02.6 48.2 10.6 15.0 52.5 05.3 31.6 08.3 21.4 42.3 11.5 55.1 22.4 14.7 16.9 43.5 48.2 00.5 54.4 52.5 17.0 14.0 08.0 42.4 39.7 25.8 11.9 47.4 02.9 35.0 56.6 06.2 35.5 36.7 26.6 49.0 46.9 15.5 19.3 40.3 02.0 58.6 29.4 36.9 11.8 26.9 45.9 48.0 46.7 35.6 19.6 00.8

TAT N

LON E

35.52 35.97 37.12 34.69 37.56 37.33 39.72 36.84 37.37 35.46 36.33 35.03 37.44 38.58 37.82 35.50 39.40 37.54 37.39 37.39 37.48 34.22 37.42 38.53 34.67 35.09 39.23 37.61 37.39 36.71 38.64 37.99 35.55 36.88 36.59 36.78 37.70 39.23 39.33 37.41 38.34 36.67 40.49 37.53 38.48 37.12 35.11 35.91 34.25 38.42 34.25 34.85 38.11 35.67 35.05

24.66 24.66 27.72 23.86 20.35 20.46 20.32 21.39 20.54 27.06 23.30 25.39 20.63 22.21 21.93 23.74 20.39 20.55 20.56 20.44 20.61 24.77 20.59 22.12 24.12 23.31 21.72 20.71 20.49 23.35 20.42 21.53 25.98 27.05 26.94 27.42 28.89 22.27 29.08 20.56 20.67 26.98 27.48 20.37 21.62 21.22 25.51 26.98 25.44 22.57 25.93 26.27 22.48 24.00 22.99

DEPTH KM

64 98 33 46 33 20 59 51 52 45 52 73 33 51 79 92 53 8 38 43 48 33 41 51 22 33 36 49 49 66 31 33 125 167 154 163 3 58 14 63 52 168 10 43 16 68 33 99 81 33 58 42 29 69 33 179

OBS

165 98 24 42 202 81 32 41 24 11 33 102 14 16 17 18 26 160 19 32 21 21 19 17 19 94 31 22 19 20 21 14 49 96 26 35 94 26 111 35 52 22 9 122 18 36 10 68 14 21 22 21 14 29 10

MAG MS

5.0 4.8 4.2 4.7 6.3 5.4 4.6 4.7 4.1 4.0 4.4 4.9 4.0 4.0 4.3 4.3 4.6 5.3 4.2 4.6 4.3 4.0 4.4 4.7 4.2 5.4 4.9 4.4 4.3 4.1 4.4 4.3 4.7 5.2 4.2 4.7 5.1 4.2 4.9 4.3 4.4 4.2 4.4 5.0 4.3 4.3 4.4 4.9 4.2 4.2 4.2 4.3 4.2 4.5 4.2

DATE

1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1976 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977

NOV 12 12 13 13 18 21 22 22 24 26 27 27 28 29 DEC 15 24 26 27 30 31 JAN 03 16 18 24 25 FEB 17 21 23 MAR 08 22 23 26 28 APR 05 05 13 22 MAY 05 13 16 21 27 JUN 02 10 17 21 27 28 JUL 01

09 12 14 18 25 27

ORIG.TIME GMT

TAT N

LON E

09 51 10.8 09 55 33.4 06 09 46.5 11 54 48.1 12 09 22.8 23 10 33.3 03 31 15.7 11 53 06.1 20 57 05.5 21 30 43.4 15 36 41.4 18 44 45.4 19 25 17.3 17 16 07.3 16 06 24.7 21 48 39.7 08 41 27.3 07 54 13.3 15 12 37.9 00 39 57.0 00 44 07.8 09 16 49.1 20 46 51.9 06 38 04.3 23 54 18.1 03 17 09.6 17 44 15.3 20 21 18.0 03 01 36.7 20 02 13.0 11 55 53.4 05 48 44.0 10 50 18.0 17 15 08.1 19 50 48.2 09 30 55.2 23 57 07.2 23 13 07.3 16 14 34.7 08 16 00.6 23 22 49.0 22 31 49.1 17 20 19.5 23 02 32.3 15 41 45.4 19 13 26.1 22 53 44.4 21 03 41.4 12 40 38.5 10 24 26.5 13 32 56.6 00 39 01.9 10 09 15.6 22 28 54.9 23 49 31.7

38.62 38.57 34.97 38.61 36.86 38.38 38.80 37.23 37.21 36.28 37.50 37.21 37.30 34.86 35.48 36.24 38.93 39.13 37.91 37.91 38.21 37.89 35.78 34.85 39.36 35.50 37.48 36.99 36.54 38.41 39.66 37.81 36.80 39.28 35.03 37.49 38.93 34.63 39.14 35.38 36.49 35.23 35.20 35.12 38.44 35.57 35.72 37.74 40.69 35.22 36.63 36.21 41.56 35.09 34.16

26.73 26.71 23.32 26.72 24.56 26.86 22.01 20.14 20.33 27.27 20.08 20.10 20.34 25.69 23.33 26.76 20.17 20.56 22.82 22.91 23.11 22.93 29.41 25.85 28.13 22.20 20.51 21.96 28.43 20.80 28.55 23.24 27.51 23.29 26.32 19.88 21.16 24.79 23.65 26.52 27.09 26.50 27.68 22.76 20.35 29.60 27.30 21.18 20.79 23.54 26.96 27.71 20.07 23.78 26.08

DEPTH KM

24 6 29 33 65 33 33 33 33 42 33 33 24 46 49 160 33 32 34 54 23 52

57 106 23 33 53 80 63 84 23 37 24 37 54 33 70 16 33 47 104 68 33 33 59 46 33 33 33 73 157 33 42 46 33 180

CBS

34 54 88 15 22 13 20 10 25 10 10 12 106 17 50 14 9 78 52 9 8 49

39 13 25 8 25 46 34 14 43 32 66 18 37 5 43 54 22 46 6 100 39 52 17 39 34 13 17 43 37 25 21 48 18

MAC MS

4.3 4.7 5.3 4.4 4.2 4.1 4.4 4.1 4.2 4.2 4.4 4.2 4.9 4.8 4.4 4.3 4.4 4.9 4.7 4.4 4.4 4.6 4.3 4.0 4.6 4.0 4.9 4.2 4.0 4.2 4.6 4.7 4.9 4.7 4.1 4.1 4.2 4.1 4.7 4.2 4.0 4.8 4.2 4.1 4.2 4.7 4.1 4.7 4.2 4.2 4.2 4.0 4.9 4.2 4.7

DATE

1977 JUL 30 1977 AUG 05 18 1977 18 1977 1977 18 25 1977 1977 30 1977 30 1977 30 1977 31 1977 SEP 10 1977 10 1977 11 1977 12 12 1977 1977 12 1977 13 1977 14 1977 15 18 1977 1977 23 24 1977 1977 25 1977 OCT 07 1977 08 1977 10 1977 12 1977 12 1977 19 1977 22 1977 24 1977 27 1977 NOV 06 1977 17 1977 26 1977 28 1977 DEC 03 1977 09 1977 09 1977 08 1977 15 1977 16 1977 29 1978 JAN 29 1978 MAR 07 1978 APR 27 1978 MAY 23 1978 JUN 19 1978 19 1978 20 1978 20 1978 21 1978 21 1978 24 1978 26

ORIG.TIME GMT

19 13 06 09 10 03 14 20 21 08 00

06 23 02 10 23 13 18 15 05 02 20 03 12 10 08 10 20 21 10 05 22 02 06 13 02 05 15 20 00 08 07 16 10 22 08 23 10 10 20 21 03 06 00 00

51 19 38 27 04 03 45 51 01 22 56 31 19 57 52 10 04 49 53 57 58 43 12 42 25 49 14 37 29 02 38 43 48 28 19 59 39 53 36 40 06 37 52 23 33 33 34 31 48 03 51 20 00 14 03

37.5 54.8 36.3 40.0 43.4 09.3 03.6 50.2 58.4 15.3 09.7 41.8 23.7 55.0 31.6 32.3 09.9 07.6 38.9 19.3 01.2 08.9 23.5 51.3 30.8 42.5 27.8 34.3 21.1 09.1 18.5 32.5 44.9 09.1 47.2 10.8 29.5 36.7 44.0 43.6 10.8 30.1 56.7 44.3 46.1 29.2 15.3 05.5 10.7 29.5 03.4 25.6 05.7 28.0 48.8

TAT N

36.84 34.27 39.67 35.22 35.07 35.00 36.64 36.38 36.42 37.74 34.62 34.93 35.05 34.99 35.03 35.65 34.95 34.99 34.91 34.92 41.50 35.06 34.89 38.76 35.06 35.40 39.38 34.98 34.83 34.95 34.65 37.96 42.08 42.02 38.49 36.05 40.25 38.35 39.37 35.21 34.92 38.43 38.44 35.18 34.66 38.99 40.78 40.77 40.68 40.75 40.64 40.67 40.67 41.78 42.37

LON E

DEPTH KM

21.65 51 24 25.80 4 25.53 42 23.39 23.31 33 28.28 10 21.60 36 21.56 33 21.29 33 21.24 73 26.24 64 23.01 33 23.03 33 23.17 36 23.12 59 24.17 165 23.07 33 23.06 33 23.01 33 23.31 33 20.07 23 23.21 64 23.15 64 20.63 33 23.27 60 23.38 81 48 21.70 23.99 33 24.94 56 23.16 33 26.83 33 27.88 24 24.06 23 24.08 12 20.28 66 27.76 85 19.91 27 27.19 19 28.55 33 23.38 62 23.08 47 27.22 34 22.30 18 25.94 33 25.50 33 22.03 33 23.41 33 23.10 10 23.06 10 23.41 15 23.02 10 23.10 10 23.19 10 20.50 10 20.40 10 ME

0BS

79 56 19 125 26 14 53 13 8 43 44 74 198 106 32 14 39 80 27 17 95 54 34 17 12 17 14 8 9 107 27 90 24 22 41 229 55 94 8 42 17 72 71

MAG MS

4.9 4.2 4.7 5.3 4.0 4.1 4.6 4.6 4.6 4.7 4.0 5.1 6.2 4.5 4.0 4.1 4.2 4.5 4.4 4.2 4.7 4.2 4.1 4.3 4.1 4.3 4.7 4.1 4.2 5.1 4.3 4.7 4.8 4.7 4.6 5.9 5.0 4.6 4.2 4.4 4.2 4.8 4.8 5.7 5.7 5.2 5.3 5.2 4.8 6.4 4.1 4.2 4.2 4.8 4.6

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Kandilli Obs., Turkey and Seis. Inst. Uppsala, Sweden. Alvarez, W., 1973. The application of plate tectonics to the Mediterranean region. In: Implications of Continental Drift to the Earth Sciences, 2. Academie Press, London, 893-908. Bath, M., 1958. The energies of seismic body waves and surface waves, In: H. Benioff, M. Ewing, B.F. Howell Jr. and Press (Editors), Contributions in Geophysics, Pergamon, London, 1: 1-16. Bath, M., 1969. Handbook on earthquake magnitude determinations . Seism. Inst., Uppsala, 158pp. Bath, N,, 1973. Introduction to seismology, Birkhauser Verlag Basel, 395pp. Bath, M., 1975. Seismicity of the Tanzania region, Tectonophysics, 27, 353-379. Bath, N. and Duda, S.J., 1963. Strain release in relation to focal depth, Geofis. pura e appl. 56, 93-100. Benjamin, J.R. and Cornell, C.A., 1970. Probability, statistics and decision for Civil Engineers, McGraw-Hill, New York, 684pp. Bevington, P.R., 1969. Data reduction and error analysis for the physical sciences, McGraw-Hill, New York, 336pp.

IM

Burton, P.W., 1978a. Perceptible earthquakes in the United Kingdom, Geophys. J.R.astr.Soc., 54: 475-479. Burton, P.W., 1978b. The application of extreme value statistics to seismic hazard assessment in the European area, Proc. Symp, Anal. Seismicity and on Seismic Risk, Liblice, 17-22 October 1977. Academia, Prague 1978, 323-334. Burton, P.W., 1978c. The IGS file of seismic activity and its use for hazard assessment, Inst. of Geol. Sciences, Seism. Bul. No. 6, 13pp. Comninakis, P.E., 1975. A contribution to the investigation of the seismicity of the area of Greece. PhD. Thesis, Athens University, lIOpp. Comninakis, P.E.,and Papazachos, B.C., 1972. Seismicity of the Eastern Mediterranean and some tectonic features of the Miditerranean Ridge, Geol. Soc. Am. Bul., 83, 1093-1102. Comninakis, P.E., and Papazachos, B.C., 1976. Note on the crustal structure of the eastern Mediterranean, Ann. di Geofis., 24, 59-63. Constantinescu, L., Ruprechtova, L., and Enescu, D., 1966. MediterraneanAlpine earthquake mechanisms and their seismotectonic implications, Geophys. J.R.astr.Soc., 10, 347-368. Cornell, C.A., and Kallberg, T.K., 1969. Seismic risk in Southern California. M.I.T., Dept. of Civil Eng., Research Report, R69-31. Cornell, C.A., and Vanmarcke, E.H., 1969. The major influences on seismic risk, 4th World Conf. on Earth. Engineering, Chile. Crampin, S., and Uer, S.B., 1975. The seismicity of the Marmara Sea region of Turkey. Geophys. J.R.astr.Soc., 40, 269-288. Curtis. J.W., 1973. A magnitude domain study of the seismicity of Papua, New Guinea, and the Solomon Islands, Bul. Seism. Soc. Am., 63, 787-806. Davis, H.A., 1970. Order Statistics, John Wiley and Sons, Inc., New York, 272pp.

Dewey, J.F., Pitman III, W.C., Ryan, W.B.F., and Bonnin, J., 1973.

Plate

tectonics and the evolution of the Alpine system. Geol. Soc. Am. Bull. 84, 3137-3180. Dewey, J.F., and Sengor, A.M.C., 1978. Aegean and surrounding regions: complex multi-plate and continum tectonics in a convergent zone, Geol. Soc. Am. Bull. (in press). Dick, I.D., 1965. Extreme Value theory and earthquakes, Proc. 3rd World Conf. on Earth. Eng., 1, 45-53. Donovan, N.C., 1973. A statistical evaluation of strong motion data including the February 9, 1971 San Fernando earthquake, Proc. 5th World Conf. on Earth. Engineering, Rome. Douglas, D., 1976. Joint epicentre determination, Nature, 215, 47-48. Douglas, A., Young, J.B., and Lilwall, R.C., 1974. Computer programs for epicentre determination, AWRE Report No. 0 28/74. Drakopoulos, J., 1976a. On the completeness of macroseismic data a) in the major area of Greece; b) in the Balkan area, Proc. of the seminar on seismic zoning maps, UNESCO - Skopje, 1, 132-155. Drakopoulos, J., 1976b. On the seismic zoning problems in Greece, Proc. of the seminar on seismic zoning maps, UNESCO - Skopje, 1, 300-335. Duda, S.J., 1965. Secular seismic energy release in the Circum-Pacific Belt, Tectonophysics, 2, 409-452. Epstein, B., and Lomnitz, C., 1966. A model for the occurrence of large earthquakes, Nature, 211, 954-956. Esteva, L., 1974. Geology and probability in the assessment of seismic risk, Proc. 2nd mt. Congr. Int-Assoc. Eng. Geol., Sau Paulo. Esteva, L., 1976. Seismicity. In: Seismic Risk and Engineering Decisions, Lomnitz, C., and Rosenblueth, E., editors, Elsevier Scient. Pubi. Comp., Amsterdam, 425pp.

184

Esteva, L., and Rosenblueth, E., 1964. Espectos de temblores a distancias moderadas y grandes, Bol. Soc. Mex. In. Sisutica, 2, 1-18. Finetti, I., 1976. Mediterranean Ridge: A young submerged chain associated with the Hellenic Arc, Bollet.Geof. Teor. ed Applic., 19, 31-65. Flinn, E.A., 1965. Confidence region and error determinations for seismic event location, Revs, of Geophysics, 3, 157-185. Galanopoulos, A.G., 1953. Katalog der Erdbeben in Griechenland fur die Zeit von 1879 bis 1892, Ann. Gol.d. Pays Hellen, 5, 114-229. Galanopoulos, A.G., 1960. A catalogue of shocks with lo >_ VI or M

5 for

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