Analysis on the Impact of Seismogenic Fault on the Micro and Macro-epicenter Deviation: Taking Xinjiang Area as an Example

Abstract

Abstract:

How to estimate the micro and macro-epicenter deviation is a key problem to earthquake emergency and rescue response. Taking Xinjiang area as an example, this study investigated the relationship between micro and macro-epicenter deviation and seismogenics structures, and provided a new method for the fast determination of possible macro-epicenter based on the micro-epicenter and seismogenics structures for the earthquakes Ms≥6.5. There are 3 types of faults in Xinjiang, including the thrust fault, the thrust-slip fault and the strike-slip fault. The deviation of the ideal micro-epicenter direction depends on the nature of rupture (such as unilateral rupture, bilateral rupture), so it is difficult to determine the exact location of the ideal micro-epicenter in the seismogenic fault, and it is a certain randomness, but the deviation of the micro and macro-epicenter is consistent with the overall direction of tectonic stress direction. The macro-epicenter location is located in or near the seismogenic fault in actual application.

Key words: fast determination, macro-epicenter, micro-epicenter, deviation, fault, seismogenics structure, Xinjiang area

CLC Number:

P315

LAN Xiao-Wen, TIAN Jia-Yong, XIE Zhou-Min, JIANG Wen-Liang, LU Ming, SHI Zhen-Liang. Analysis on the Impact of Seismogenic Fault on the Micro and Macro-epicenter Deviation: Taking Xinjiang Area as an Example[J]. Geoscience, 2011, 25(1): 114-121.

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