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1979: A GENERAL METHOD FOR DETERMINATION OF EARTHQUAKE PARAMETERS BY COMPUTER. Acta Seismologica Sinica, 1(2): 186-196.
Citation: 1979: A GENERAL METHOD FOR DETERMINATION OF EARTHQUAKE PARAMETERS BY COMPUTER. Acta Seismologica Sinica, 1(2): 186-196.
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A GENERAL METHOD FOR DETERMINATION OF EARTHQUAKE PARAMETERS BY COMPUTER

  • Fudan University, Shanghai

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  • Published Date: August 31, 2011
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    • Abstract
  • In this paper, a general method has been developed for determining earthquake parameters on basis of one or several phases of recorded waves when the travel time tables are given. The problem is reduced to minimizing some criterion function. On the computer an efficient and direct searching technique, the Powell method is proposed. This technique allows the requirements to the starting value to be less critical. Generally, the location of a station with the least arrival is selected as a start. From the arrival data of a single phase, two phases and the first motion of unknown phases, the determinations of parameters of earthquakes are illustrated and some numerical examples given. Computations for more than 100 local and near earthquakes recorded by certain seismic station networks are described.
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    • References (1)
  • [1] W. H. K. Lee and J. C. Lahr, A computer program for determining hypoconter, magnitude and first motion pattern of local earthquakes (HYPO71), U. S. G. S., Open report 1972.

    [2] E. A. Flin, Local earthquake with an electronic computer, Bull. Seism. Soc, Am., 50, 3, 467—470, 1960.

    [3] V. I. Keilis—Borok. et, al., Computer determination of earthquake epicenters, Computational Seismology, 13—15 (Translated from Russian), 1972.

    [4] 国家地震局地球物理研究所, 近震分析, 地震出版社, 1978.

    [5] M. J. Powell, An efficient method for finding the minimum of a function of several variables without calculating derivatives, Computer J. 7, 2, 155—162, 1964.

    [6] A. Ralston, H. S. Wilf, Mathematical methods for digital computers, 95—111, 1960.

    [7] 吴方, 关于Powell方法的一个注, 数学学报, 20, 1, 14—15, 1977.
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