苍山地震库仑破裂应力变化与地震活动相关性探讨

地震 ›› 2012, Vol. 32 ›› Issue (4): 148-156.

苍山地震库仑破裂应力变化与地震活动相关性探讨

曲均浩^1,2, 李金³, 石玉燕¹, 宋金⁴崔鑫¹, 王冬雷¹, 鹿子林¹, 张志慧¹

1. 山东省地震局, 山东济南 250014;
2. 中国地震局地质研究所, 北京 100029;
3. 中国地震局地震预测研究所, 北京 100036;
4. 中国地震台网中心, 北京 100045

收稿日期:2012-04-24 修回日期:2012-07-23 发布日期:2021-08-19
作者简介:曲均浩(1981-), 男, 山东平度人, 在读博士研究生, 主要从事数字地震及地震序列等研究。
基金资助:
山东省地震局重点科研基金(JJ1105Y)和山东省自然科学基金(ZR2012DQ009)资助

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

QU Jun-Hao^1,2, LI Jin³, SHI Yu-Yan¹, SONG Jin⁴, CUI Xin¹ WANG Dong-lei¹, LU Zi-lin¹, ZHANG Zhi-hui¹

1. Earthquake Administration of Shandong Province, Jinan 250014, China;
2. Insitute of Geology, CEA, Beijing 100029, China;
3. Instituite of Earthquake Science, CEA, Beijing 100036, China;
4. China Earthquake Networks Center, Beijing 100045, China

Received:2012-04-24 Revised:2012-07-23 Published:2021-08-19

摘要/Abstract

摘要： 本文收集了苍山地震周围断层的几何参数和运动学参数, 选择不同的接受断层, 研究了苍山地震库仑应力变化对余震及周边断层活动的影响。结果表明, 苍山地震正的库仑应力变化对余震活动有促进作用, 大部分苍山余震分布于库仑应力变化增加区域, 应力增加量值为0.003~0.005 MPa。通过对比该地区苍山地震前后16年的地震资料, 发现苍山地震正的库仑应力变化对苍山断裂附近地震活动增强亦有一定的促进作用, 而对于周边其他断层, 由于距离较远, 库仑应力变化量较小, 苍山地震库仑应力变化的影响可以忽略。

关键词: 库仑应力, 苍山地震, 触发作用, 地震活动

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

中图分类号:

P315.7

曲均浩, 李金, 石玉燕, 宋金崔鑫, 王冬雷, 鹿子林, 张志慧. 苍山地震库仑破裂应力变化与地震活动相关性探讨[J]. 地震, 2012, 32(4): 148-156.

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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