An efficient method for joint hypocenter determination for large groups of earthquakes

Abstract The number of seismic events that can be located simultaneously by the Joint Hypocenter Determination method is limited generally by the amount of computer time and computer memory available. To find directly the hypocenters of M earthquatkes and the station corrections to N stations requires solving a system of 4M + N equations in 4M + N unknowns. This paper presents a method of solving this system of equations which is considerably more efficient than Guassian elimination.

[1]  S. T. Algermissen,et al.  Seismicity of the Middle America arc-trench system near Managua, Nicaragua , 1974, Bulletin of the Seismological Society of America.

[2]  P. G. Gibbs,et al.  The Epicentres and Origin Times of Some Large Explosions , 1968 .

[3]  K. E. Bullen,et al.  An Introduction to the Theory of Seismology , 1964 .

[4]  J. Dewey.  Seismicity of Northern Anatolia , 1976, Bulletin of the Seismological Society of America.

[5]  R. C. Lilwall,et al.  Methods of Estimating Travel Times and Epicentres , 1972 .

[6]  S. Billington,et al.  Identification of fault planes associated with deep earthquakes , 1975 .

[7]  A. Qamar.  Seismicity of the Baffin Bay region , 1974, Bulletin of the Seismological Society of America.

[8]  James W. Dewey,et al.  Seismicity and tectonics of western Venezuela , 1972, Bulletin of the Seismological Society of America.

[9]  J. Dewey,et al.  The Ghir earthquake of April 10, 1972 in the Zagros Mountains of southern Iran: seismotectonic aspects and some results of a field reconnaissance , 1973, Bulletin of the Seismological Society of America.

[10]  Bruce A. Bolt,et al.  The Revision of Earthquake Epicentres, Focal Depths and Origin-Times using a High-Speed Computer , 1960 .

[11]  B. Isacks,et al.  Investigation of the 1966 earthquake series in northern China using the method of joint epicenter determination , 1976, Bulletin of the Seismological Society of America.

[12]  Helen W. Freedman.  A statistical discussion of P residuals from explosions Part II , 1967 .

[13]  A. DOUGLAS,et al.  Joint Epicentre Determination , 1967, Nature.