2011年盈江M_S5.8地震前震及余震序列双差定位研究  

Relocation of foreshocks and aftershocks sequence of the 2011Yingjiang M_S5.8 earthquake using double-difference location algorithm

作　　者：陈佳[1] 杨军[1] 叶泵[1] 王军[1] 李孝宾[1] 高琼[1] 

机构地区：[1]云南省地震局滇西地震预报实验场办公室,大理671000

出　　处：《国际地震动态》2014年第4期6-10,共5页Recent Developments in World Seismology

基　　金：中国地震局地震监测;预报;科研三结合课题(20122004)资助

摘　　要：采用双差定位方法对云南省盈江MS5.8地震的前震及余震序列进行精定位,得到1 769个地震的精定位结果。结果显示,前震序列分布在大盈江断裂第一分支两侧,呈椭圆形分布,长轴约14km;余震序列呈共轭型分布特征;从震源深度上看,所有地震都分布在深度20km以内,其中90%以上的地震分布在深度10km以内,这也是造成盈江地震主震区烈度达Ⅷ度的主要原因。The high-resolution hypocenter locations of foreshocks and aftershocks se-quence of the Yingjiang MS 5.8 earthquake are determined in Yunnan by using double-differ-ence earthquake location algorithm,and 1 769 earthquakes with fine locating results are ob-tained.The results show that foreshocks distribute along the two sides of the first branch of the DaYingjiang fault,and the space shows an elliptic distribution with a long axis of 14 km;The aftershocks distribution has conjugated characteristic.The depths of all the earthquakes are distributed within 20 km,and more than 90% of them are distributed within 10 km,this is the main reason why the intensity of the earthquake is Ⅷ.

关 键 词：双差定位 盈江地震 大盈江断裂 前震及余震序列 

分 类 号：P315.3[天文地球—地震学]