中国大陆7级大地震强余震震级和空间分布特征

Abstract

Abstract: Using the earthquake sequence data of M_S7.0~7.9 earthquakes since 1966 in mainland China, we study the characteristics of magnitude difference distribution between main shocks and their strong aftershocks and the spatial distribution characteristics of strong aftershocks away from their main shocks. The results show that the magnitude difference distribution obeys intercepted exponential distribution and obtain the B value of 0.72 for the whole earthquake sequences and the B value of 0.73 for the strike-slip earthquake sequences, while the spatial distribution of strong aftershocks obeys normal distribution and the dominated distribution area of strong shocks of strike-slip earthquakes is 5~59 km and 10~29 km for the no-strike-slip earthquakes.

Key words: Mainland China, Earthquake sequences, Strong aftershock, Magnitude difference distribution, Spatial distribution

CLC Number:

P315.7

LU Xiao-jian, GAO Meng-tan, HAO Ping, CHEN Dan. Magnitude and Spatial Distribution of Strong Aftershocks of M7 Earthquakes in Mainland China[J]. EARTHQUAKE, 2010, 30(2): 61-70.

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Magnitude and Spatial Distribution of Strong Aftershocks of M7 Earthquakes in Mainland China

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