2024年1月23日乌什M_(S)7.1地震序列重定位研究  

WUSHI M_(S)7.1 EARTHQUAKE SEQUENCE RELOCATION RESEARCH ON JANUARY 23,2024

作　　者：祖力卡尔·艾则孜 南芳芳[1] 徐衍刚[1] Zulikaer Aizezi;NAN Fang-fang;XU Yan-gang(Aksu Seismic Station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Akesu,843000,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局阿克苏地震监测中心站,新疆阿克苏843000

出　　处：《内陆地震》2024年第2期194-200,共7页Inland Earthquake

摘　　要：为深入研究乌什M_(S)7.1地震,采用双差地震定位法对地震序列进行重定位,定位结果显示:①重定位后主震空间位置变化不大,和重定位前的位置相距2 km,深度为25.6 km,比重定位前深度更深。②重定位后,地震序列沿迈丹断裂分布的收敛特征更加明显,同时存在余震向南移动的趋势,与地震烈度图和灾情分布特征一致。③迈丹断裂在受到山前挤压作用时,在主震震中附近受阻,形成明显的地震稀疏带。迈丹断裂乌什段发震构造比阿合奇段发震构造深,活动性比较弱,因此在主震震中SW向余震多而浅,NE向余震少而深。In order to further study Wushi M_(S)7.1 earthquake,double-difference seismic position method was used to relocate the seismic sequence,and the positioning results showed that:①after relocation,the spatial position of the mainshock did not change much.It was 2 km away from the position before relocation,and the depth was 25.6 km,which was deeper than that before relocation.②After reposition,earthquake sequence had a tendency to develop southward along the Maidan fault,which was basically consistent with the distribution characteristics of disasters.③When the Maidan fault was extruded by the piedmont extrusion,it was stopped near the epicenter of the mainshock,and the seismic structure of the Wushi section of the Maidan fault was deeper than that of the Aheqi section,and the activity was relatively weak,so there were more and shallow aftershocks in the SW direction and fewer and deeper aftershocks in the NE direction in the mainshock epicenter.

关 键 词：乌什M_(S)7.1地震 双差地震定位法 地震序列 

分 类 号：P315.7[天文地球—地震学]