摘要
2013年10月31日在吉林省松原市前郭县发生MS5.5、MS5.0级地震，11月22日和11月23日又分别发生MS5.3、MS5.8和MS5.0级地震，构成2013年吉林前郭5级震群，其中最大的地震为11月23日的MS5.8级地震，发震断层位于扶余-肇东断裂附近。本研究计算前郭MS5.8级地震的静态库伦应力，明确前郭MS5.8级地震对周围的同震库仑应力影响；进一步计算前郭地震对周围主要断裂带的静态库仑应力影响，结果显示，前郭MS5.8级地震对其附近的长春-四平断裂、密山-敦化断裂带的影响是卸载的，对依兰-伊通断裂的影响是加载的，应力加载量在＋0.002-0.004bar。
MS 5.5, MS 5.0 earthquakes occurred in Qianguo county, Songyuan city, Jilin province. A few days later MS 5.3, MS 5.8 and Ms 5.0, earthquakes occurred in the Qianguo region on Fuyu-Zhaodong fault on November 22, 23, 2013, respectively, which has formed the earthquake swarm of M 6.0. In this study, we calculated the Coulomb stress change induced by the Qianguo MS 5.8, earthquake at first. Then we calculated the Coulomb stress change generated by the Qianguo earthquake. It is found that the influence of the Qianguo earthquake on the surround faults is mainly Coulomb stress decrease, such as the Changchun-Siping fault and the Mishan-Dunhua fault. However, the Coulomb stress change on the yilan-yitong fault is increase, between ＋0.002 to ＋0.004bar.
出处
《防灾减灾学报》
2014年第3期16-19,共4页
Journal of Disaster Prevention And Reduction
关键词
前郭地震
静态库仑应力
对断层影响
Qianguo earthquake
Static Coulomb Stress
fault interactions
