全球大陆7级浅源大地震强余震震级和空间分布特征

Abstract

Abstract: We collect data for 29 earthquake sequences with M_S7.0~7.9 from 1966 to 2007 in the continents of world (except China continent), and then devide them into strike-slip or no-strike- slip earthquake sequences. Seventeen earthquake sequences are strike-slip type and twelve earthquake sequences are no-strike-slip type. We study the characteristics of the magnitude difference distribution between main shocks and their strong aftershocks; and then study the spatial distribution characteristics of strong aftershocks away from their main shocks of the 29 earthquake sequences. The result shows that the magnitude difference distribution obeys intercepted exponential distribution, the B value is 0.58 for the strike-slip type earthquake sequences and 1.07 for the no-strike-slip type earthquake sequences. While the spatial distribution of strong aftershocks obeys normal distribution, the dominated distribution area of strong shocks of the strike-slip type earthquake sequences is 10~45 km and no-strike-slip type earthquake sequences is 20~59 km.

Key words: Continents of the world, Earthquake sequences, Strong shock, Spatial distribution Magnitude distribution

CLC Number:

P315.7

LU Xiao-jian, GAO Meng-tan, CHEN Dan. Magnitude and Distance Distribution Characteristics of Strong Aftershocks in Continents of the World[J]. EARTHQUAKE, 2010, 30(3): 108-122.

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Magnitude and Distance Distribution Characteristics of Strong Aftershocks in Continents of the World

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