Discussion on moment tensor solution and seismogenic structure of Ruichang-Yangxin earthquake on 10 September 2011

作     者：Lifen Zhang1,2, Guichun Wei and Wulin Liao1 1 Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China 2 Institute of Geophysics, China Earthquake Administration, Beijing 100081, China 

作者机构：Key Laboratory of Earthquake Geodesy Institute of Seismology China Earthquake Administration Wuhan China Institute of Geophysics China Earthquake Administration Beijing China 

出 版 物：《Earthquake Science》 (地震学报（英文版）)

年 卷 期：2012年第25卷第3期

页      面：229-234页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 070801[理学-固体地球物理学] 0707[理学-海洋科学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0814[工学-土木工程] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 

基　　金：supported by the Director Foundation of Institute of Seismology, China Earthquake Adminstration(IS201102643) National Nature Science Foundation of China (No. 41004020) 

主　　题：moment tensor inversion Ruichang-Yangxin earthquake seismogenic structure 

摘      要：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.