芦山M7．0地震余震分布特征

摘要

使用双差定位方法，对2013年4月20日08时02分芦山 M 7．0地震后近10天的余震进行重新定位，获得精度较高的重定位结果；在此基础上，对余震空间分布特征进行研究，推测芦山主震的发震断层可能为大川-双石主断裂东侧的一条次级隐伏逆冲断层。%The double difference location method is used in this stady to relocate the aftershocks in nearly 10 days after Lushan M 7.0 earthquake at 8 o′clock 2 minutes on April 20,2013.The relocation results with higher accuracy are obtained.And on this basis,the space distribution features of aftershocks are studied,the inferred seismogenic fault may be a secondary con-cealed thrust fault on the east side of the Dachuan-Shuangshi main fault.