- A - Physics of the Earth's Interior
- B - Seismology
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C - Geomagnetism
C-117, C-116, C-115, C-114, C-113, C-112, C-111, C-110, C-109, C-108, C-107, C-106, C-105, C-104, C-103, C-102, C-101, C-100, C-99, C-98, C-97, C-96, C-95, C-94, C-93, C-92, C-91, C-90, C-89, C-88, C-87, C-86, C-85, C-84, C-83, C-82, C-81, C-80, C-79, C-78, C-77, C-76, C-75, C-74, C-73, C-72, C-71, C-70, C-69, C-68, C-67, C-66, C-65, C-64, C-63, C-62, C-61, C-60, C-59, C-58, C-57, C-56, C-55, C-54, C-53, C-52, C-51, C-50, C-49, C-48, C-47, C-46, C-45, C-44, C-43, C-42, C-41, C-40, C-39, C-38, C-37, C-36, C-35, C-33, C-32, C-31, C-30, C-29, C-28, C-27, C-26, C-25, C-24, C-23, C-22, C-21, C-20, C-19, C-18, C-17, C-16, C-15, C-14, C-13, C-12, C-11, C-10, C-9, C-8, C-7, C-6, C-5, C-4, C-3, C-2, C-1
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D - Physics of the Atmosphere
D-78, D-77, D-76, D-75, D-74, D-73, D-72, D-71, D-70, D-69, D-68, D-67, D-66, D-65, D-64, D-63, D-62, D-61, D-60, D-59, D-58, D-57, D-56, D-55, D-54, D-53, D-52, D-51, D-50, D-49, D-48, D-47, D-46, D-44, D-45, D-43, D-42, D-41, D-40, D-39, D-38, D-37, D-35, D-34, D-33, D-32, D-31, D-30, D-28, D-27, D-26, D-25, D-24, D-23, D-22, D-21, D-20, D-19, D-18, D-17, D-16, D-15, D-14, D-13, D-12, D-11, D-10, D-9, D-8, D-7, D-6, D-5, D-4, D-3, D-2, D-1
- E - Hydrology
- P - Polar Research
- M - Miscellanea
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Online First
Methods for Determining Positions of Very Near Earthquakes
Volume: 84
Series:
The basic task undertaken in this volume is the location problem for very near earthquakes. An earthquake is considered to be very near when the distance between the epicenter and a station does not exceed 50 km.
CONTENTS
Introduction, ...3
SOME METHODS AND ALGORITHMS FOR LOCATING VERY NEAR EARTHQUAKES WITH A DIGITAL COMPUTER, ...7
1. THE ALGORITHM AND THE PROGRAM. AN APPLICATION TO EARTHQUAKE LOCATION IN UPPER SILESIA, ...8
1.1. Previous attempts to locate Silesian earthquakes with a digital computer, ...8
1.2. Formulation of the problem. Assumptions for the program "OGNISKA-2", ...11
1.3. The algorithm, ...15
1.3.1. Preliminary minimization of the functional F(x), ...16
1.3.2. The principle of OPTIMALIZATION, ...22
1.3.3. A method for considering the approximative character of velocity arrays, ...28
1.4. Results obtained, ...30
2. AN ALGORITHM AND A PROGRAM FOR LOCATING VERY NEAR EARTHQUAKES BY THE METHOD OF AZIMUTHAL SEISMOGRAPHS, ...34
2.1. PREVIOUS RESEARCH, ...34
2.2. The algorithm, ...34
APPENDIX I. Characteristics and features of the program "OGNISKA-2". Data arrangement. Form of the outprint, ...39
APPENDIX II. The program "OGNISKA-2", ...44
APPENDIX III. An example of an outprint, ...68
APPENDIX IV. Characteristics and features of the program "AZYMUT". Data arrangement. Form of the outprint, ...71
APPENDIX V. The program "AZYMUT", ...73
APPENDIX VI. An example of an outprint, ...84
REFERENCES, ...85
ABSTRACT, ...89
Streszczenie, ...90
ON OPTIMAL RECORDING OF VERY NEAR EARTHQUAKES, ...91
1. SOME ELEMENTS OF THE THEORY OF OPTIMAL EXPERIMENTS AND NOTATION USED, ...91
2. ON AN OPTIMAL NET OF REGIONAL SEISMIC STATIONS, ...93
2.1. On the number of seismographs which minimizes the normalized loss function, ...93
2.2. On an optimal configuration of a net of seismic stations, ...94
3. ON AN OPTIMAL DISPOSITION OF AZIMUTHAL SEISMOGRAPHS, ...100
3.1. On an optimal disposition of observation points for a case of trigonometric regression, ...100
3.2. Analysis of the information on arrival directions of seismic waves and on rotational waves obtained from stations of azimuthal seismographs situated in Upper Silesia, ...104
4. ON AN OPTIMAL DISPOSITION OF AZIMUTHAL STATIONS, ...107
4.1. Formulation of the problem, ...107
4.2. The variance of earthquake epicenter, ...109
4.3. Properties of the function D(E), ...111
4.4. The results, ...112
REFERENCES, ...117
ABSTRACT, ...118
Streszczenie, ...119