印尼MS8.7地震对中国大陆3次后续中强地震的动应力触发研究

地震 ›› 2006, Vol. 26 ›› Issue (3): 26-36.

印尼M_S8.7地震对中国大陆3次后续中强地震的动应力触发研究

郝平¹, 刘杰², 韩竹军³, 傅征祥¹

1.中国地震局地震预测研究所, 北京 100036;
2.中国地震台网中心, 北京 100036;
3.中国地震局地质研究所, 北京 100029

收稿日期:2006-03-13 修回日期:2006-04-18 发布日期:2021-11-01
作者简介:郝平(1967-), 男, 甘肃天水人, 副研究员, 1993年获硕士学位, 主要从事地震应力触发方面的研究。
基金资助:
地震科学联合基金项目(103073); 中国数字地震观测网络工程城市活断层实验探测项目

Dynamic stress triggering of three subsequent moderately strong earthquakes in China's mainland following the Indonesia M_S8.7 Earthquake

HAO Ping¹, LIU Jie², HAN Zhu-jun³, FU Zheng-xiang¹

1. Institute of Earthquake Science, CEA, Beijing 100036;
2. China Earthquake Networks Center, CEA, Beijing 100036;
3. Institute of Geology, CEA, Beijing 100029, China

Received:2006-03-13 Revised:2006-04-18 Published:2021-11-01

摘要/Abstract

摘要： 印尼8.7级地震发生后, 在不到2个月时间内, 在中国大陆相继发生了3次后续中强地震(2004年12月26日云南双柏M_S5.1地震、 2005年1月26日云南思茅M_S5.1地震、 2005年2月15日新疆乌什M_S6.2地震), 印尼地震和这3次后续地震是否存在触发关系? 计算了印尼地震在3次后续地震破裂面上的动库仑应力变化和静库仑应力变化。静应力变化量小, 低于一般认为的触发阈值(0.01 MPa); 动应力变化峰值为10^-1 MPa, 可能是这3次后续地震的触发因素。

关键词: 动应力触发, 库仑破裂应力, 印尼M_S8.7地震

Abstract: In two months after Indonesia M_S8.7 earthquake, three moderately strong earthquakes (December 26, 2004 M_S5.1 Shuangbai earthquake, January 26, 2005 M_S5.1 Simao earthquake and February 15, 2005 M_S6.2 Wushi earthquake) occurred in China' mainland. Is there triggering relation between Indonesia M_S8.7 Earthquake and the three subsequent earthquakes? In this article we calculate the static and dynamic Coulomb stress changes in failure planes of the three subsequent earthquakes for Indonesia M_S8.7 Earthquake. The value of static stress change is smaller than the threshold one of triggering value (0.01 MPa);The peak change of dynamic stress is about 10^-1 MPa. So the change of dynamic stress is probably the triggering factor of the three subsequent earthquakes.

Key words: Dynamic stress triggering, Coulomb failure stress, Indonesia M_S8.7 Earthquake

中图分类号:

P315.7

郝平, 刘杰, 韩竹军, 傅征祥. 印尼M_S8.7地震对中国大陆3次后续中强地震的动应力触发研究[J]. 地震, 2006, 26(3): 26-36.

HAO Ping, LIU Jie, HAN Zhu-jun, FU Zheng-xiang. Dynamic stress triggering of three subsequent moderately strong earthquakes in China's mainland following the Indonesia M_S8.7 Earthquake[J]. EARTHQUAKE, 2006, 26(3): 26-36.

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