Ruichang-Yangxin earthquake is another moderate earthquake in Yangxin-Jiujiang area since 2005 Jiujiang-Ruichang M5.7 earthquake.In order to more understand the seismic activities in this area,we study the moment tens...Ruichang-Yangxin earthquake is another moderate earthquake in Yangxin-Jiujiang area since 2005 Jiujiang-Ruichang M5.7 earthquake.In order to more understand the seismic activities in this area,we study the moment tensor solution and the seismogenic structure of the Ruichang-Yangxin earthquake.Precise earthquake relocation shows that the mainshock occurred on the southwestern part of the NE-trending fault and aftershocks are distributed not only along the NE-trending fault but also along its conjugated NW-trending fault.By comprehensive analysis on the earthquake distribution,characteristics of isoseismal curve,focal mechanism,and regional structure characteristics,it is inferred that this earthquake is caused by the NE-trending Tanlu fault.In addition,it has close relationship with the conjugated NW-trending fault as well.Many researches have shown that the junction area is the earthquake-prone area,and should be paid more attention to.And our study also proves this viewpoint.展开更多
基金supported by the Director Foundation of Institute of Seismology,China Earthquake Adminstration(IS201102643)National Nature Science Foundation of China(No.41004020)
文摘Ruichang-Yangxin earthquake is another moderate earthquake in Yangxin-Jiujiang area since 2005 Jiujiang-Ruichang M5.7 earthquake.In order to more understand the seismic activities in this area,we study the moment tensor solution and the seismogenic structure of the Ruichang-Yangxin earthquake.Precise earthquake relocation shows that the mainshock occurred on the southwestern part of the NE-trending fault and aftershocks are distributed not only along the NE-trending fault but also along its conjugated NW-trending fault.By comprehensive analysis on the earthquake distribution,characteristics of isoseismal curve,focal mechanism,and regional structure characteristics,it is inferred that this earthquake is caused by the NE-trending Tanlu fault.In addition,it has close relationship with the conjugated NW-trending fault as well.Many researches have shown that the junction area is the earthquake-prone area,and should be paid more attention to.And our study also proves this viewpoint.
