视应力方法在震群性质判定中的应用研究

Abstract

Abstract: The swarm characteristics of Xiuyan, Haicheng and Yingkou earthquakes occurred from 1999 to 2004 are studied through apparent stress method in this paper, and the result indicates that the change of apparent stress curves of foreshock sequence is largely different from that of other earthquake swarms. The size of apparent stress can perfectly reflect the size of the stress field in the hypocenter region. Compared to the method of seismicity coefficient judgment, the change of apparent stress of earthquake swarms in the region can best reflect the course of stress change. When the former method is disable to judge the swarm characteristics well and truly, we can still make further study to judge the characteristics through the course of stress change. The relation between apparent stress and magnitude is discussed in the paper.

Key words: Digital seismology, Apparent stress, Swarm characteristics

CLC Number:

P315.5

LI Fang, LI Yu-tong, LIU You-fu. Research on the apparent stress method applying to judge the characteristics of earthquake swarm[J]. EARTHQUAKE, 2006, 26(4): 45-51.

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Research on the apparent stress method applying to judge the characteristics of earthquake swarm

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