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›› 2010, Vol. 27 ›› Issue (3): 350-355.DOI: 10.7523/j.issn.2095-6134.2010.3.007

• Research Articles • Previous Articles     Next Articles

Seismic activity analysis of relocated earthquakes in southwest Tienshan region

YU Xiang-Wei1, LEI Jian-She2, SHI Yao-Lin1, ZHANG Huai1   

  1. 1. Laboratory of Computational Geodynamics, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;
    2. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085,China
  • Received:2010-02-14 Revised:2010-02-22 Online:2010-05-15

Abstract:

We presented the relocated hypocenter parameters for 522 events of 864 earthquakes which occurred in the southwest Tienshan region. The double-difference (DD) relocating method was utilized to produce the pronounced relative event locations through adopting both the absolute and relative P-wave arrival times. The resolution of the relocated earthquake hypocenters was significantly increased. After the relocation, those formerly randomly-distributed earthquakes were clustered and aligned tending to the east-west and north-west directions. The revised hypocenter locations showed some relations with the known major active faults.

Key words: double-difference relocation method, hypocenter relocation, southwest Tienshan, seismic activity, focal depth

CLC Number: