苍山地震库仑破裂应力变化与地震活动相关性探讨

Abstract

Abstract: In order to investigate Coulomb stress changes from the 1995 Cangshan M5.2 earthquake and the effects on surrounding faults, geometry parameters and kinematic parameters of faults have been collected and different received faults are used. The results show that the positive Coulomb stress promotes aftershock activities and most aftershocks distributed in Coulomb stress increasing region, the value of which is about 0.003~0.005 MPa. Comparing the seismic references of 16 years before and after the Cangshan earthquake, we found that positive Coulomb stress increases the stress around Cangshan fault, but the effects of the Coulomb stress changes on other faults can be ignored due to the farther distance.

Key words: Coulomb stress, Triggering effect, Cangshan earthquake

CLC Number:

P315.7

QU Jun-Hao, LI Jin, SHI Yu-Yan, SONG Jin, CUI Xin WANG Dong-lei, LU Zi-lin, ZHANG Zhi-hui. Effects of Coulomb Stress Changes from the 1995 Cangshan M5.2 Earthquake[J]. EARTHQUAKE, 2012, 32(4): 148-156.

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Effects of Coulomb Stress Changes from the 1995 Cangshan M5.2 Earthquake

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