汶川8．0级地震序列活动的分段性研究  

Study on the Sectional Features of the Aftershock Sequence of the Wenchuan M_S8.0 Earthquake

作　　者：李志雄[1] 邵志刚[1] 赵翠萍[1] 李圣强[1] 王慧敏[2] 吕梅梅[2] 和平[1] 刘桂平[1] 崔子键[1] 

机构地区：[1]中国地震局地震预测研究所,北京100036 [2]中国地震台网中心,北京100045

出　　处：《地震》2009年第1期26-32,共7页Earthquake

基　　金：科技部国际合作项目(2005CB724808);地震联合科学基金项目(A07007);中国地震局地震预测研究所基本业务专项(0207690210)共同资助

摘　　要：在汶川8.0级地震序列的跟踪研究中,发现汶川地震序列具有明显的空间分段活动特点。根据对汶川地震余震序列的部分测震学指标计算,结果表明,汶川地震序列可能是由以绵竹为界,其西南段的汶川主-余震序列和绵竹北东段的北川-青川6级震群地震序列组成,汶川地震可能具有龙门山活动构造的继承性运动特点。In the process of investigating the aftershock sequence of Wenchuan Ms8. 0 earthquake, we found that there is an obvious sectional feature in the spatial distribution of its aftershocks. According to the calculation results of some seismometry index of the aftershock sequences, the whole aftershock sequence could be divided into two sub-sequences, or the main event-aftershock sequence distributed in the Wenchuan area at the south-west part of the fault and the seismic swarm sequence with several large events of magnitude Ms6.0 or greater located between Beichuan County and Qingchuan County with the boundary of Mianzhu County at the north-east part of the fault. The Wenchuan earthquake is likely to possess the characteristic of inheritance movement of active tectonics in the Longmanshan fault system.

关 键 词：汶川 8.0级地震 地震序列 活动分段性 地震类型 

分 类 号：P315.7[天文地球—地震学]