九江—瑞昌地区显著地震动态库仑破裂应力变化分析

为了探究九江—瑞昌地区内的地震活动是否存在动态应力触发关系，本文选用多层黏弹性介质模型，计算了2005年九江—瑞昌M_S5.7地震和2011年瑞昌—阳新M_S4.6地震产生的动态库仑破裂应力变化。结果显示:九江—瑞昌M_S5.7地震产生的动态库仑破裂应力变化，能触发其北东方向的53次地震；瑞昌—阳新M_S4.6地震发生后15天内，小震活动增强区及九江—瑞昌M_S5.7地震震源区的多次地震活动，可能与其动态应力触发作用有关。 

Dynamic Coulomb failure stress changes caused by significant earthquakes in Jiujiang-Ruichang region

In order to explore whether there was a dynamic stress trigger relationship between seismic activities in Jiujiang-Ruichang region, this paper calculated the dynamic Coulomb failure stress （CFS） changes caused by the 2005 M_S5.7 Jiujiang-Ruichang earthquake and 2011 M_S4.6 Ruichang-Yangxin earthquake based on the multi-layer viscoelastic medium model. The results show that the dynamic CFS changes caused by the Jiujiang-Ruichang M_S5.7 earthquake had a triggering effect on the occurrence of 53 earthquakes in the northeast direction. Within 15 days after the occurrence of the Ruichang-Yangxin M_S4.6 earthquake, the multiple events in the triggered region and the source region of the Jiujiang-Ruichang M_S5.7 earthquake were all subjected to the triggering effect of dynamic CFS change caused by the M_S4.6 earthquake.