2013年4月20日,四川雅安市芦山县发生M_s 7.0级强烈地震,造成重大的人员伤亡和经济损失。地震造成的区域库仑应力变化、对周围断层的影响及后续地震带发展趋势是应该关注的问题。利用USGS震源机制解,根据地震静态触发原理,基于弹性位错理论和分层地壳模型,计算得出芦山地震引起同震库仑应力变化从断层的1.0MPa量级减小到200km外的0.1kPa,研究认为在地震之后大部分区域的应力得到释放,鲜水河断裂道孚—康定段和玉龙希断裂南段危险性增加。

On April 20, 2013, a M_s 7.0 earthquake happened in Lushan, Sichuan Province, which killed and hurted hundreds of people, also resulted in huge financial loss. People usually cared about the changes of coulomb failure stress caused by the earthquake, and the effect on the adjacent faults, and subsequent progress after this earthquake. Based on seismic static triggering principle, the elastic dislocation theory, layered crustal model, we used the USGS focal mechanism solution, the coseismic coulomb failure stress is 1.0MPa to 0.1kPa from fault poane to 200km, stress was released in most of the area, however, the Daofu and Yulongxi segment of Xianshuihe fault became more dangerous.