2008年攀枝花-会理6.1级地震强余震触发

The largest aftershock triggering by Coulomb failure stress following theM,6.1 Panzhihua-Huili earthquake of 2008

摘要: 运用Okada方法，计算2008年8月30日攀枝花-会理M,6.1地震在其强余震M,5.6破裂面上产生的静态库仑破裂应力变化.结果显示，攀枝花-会理6.1级地震引起的静态库仑破裂应力变化量为0.37MPa，超过触发阈值，该应力增量可能触发了5.6级地震的发生.

Abstract: We apply Okadas method to calculate changes of static Coulomb failure stress on the largest aftershock (Ms=5.6) failure plane caused by the 2008 M,6.1 Panzhihua-Huili earthquake,and find that the stress change on the largest aftershock failure plane caused by the main shock is 0.37MPa，which is larger than the typical 0.01MPa stress change necessary for triggering earthquakes.Therefore,the largest aftershock was probably triggered by the Coulomb failure stress change caused by the main shock.