利用凹凸体判断柯坪块体地震危险性  

Analysis of the seismic risk of Keping block by asperity

作　　者：祖力卡尔·艾则孜 宋春燕[2] 杨萍[1] ZULIKAER Aizezi;SONG Chunyan;YANG Ping(Aksu Seismic Station,Earthquake Agency of Xinjiang Uygur Autonomous Region,Xinjiang Uygur Autonomous Region 843000,China;Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 843011,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,新疆维吾尔自治区843000 [2]新疆维吾尔自治区地震局,乌鲁木齐843011

出　　处：《地震地磁观测与研究》2022年第1期8-13,共6页Seismological and Geomagnetic Observation and Research

基　　金：新疆维吾尔自治区地震局地震科学基金(项目编号:202015)。

摘　　要：将柯坪块体作为研究对象,利用最大似然法进行b值计算,并结合利用双差定位法对柯坪块体上发生的M_(L)≥1.6地震重定位后的结果,寻找沿柯坪块体主要断裂带的凹凸体。研究发现,柯坪块体上发生地震的震中主要沿断裂带分布,沿柯坪塔格逆断裂带存在凹凸体,该区域虽已发生大地震,但依然处于高应力水平,因此初步判定沿柯坪塔格逆断裂带仍存在发生地震的危险性。In this paper,the b value of Keping block is calculated by the maximum likelihood method,and combined with the relocation results of M_(L)≥1.6 earthquakes obtained using the double difference earthquake location method to find the asperity of Keping block along the fault zone.The results show that the earthquakes in Keping block are mainly distributed along the fault zone,and there are asperities along the Kalpingtag thrust tectonic fault zone.Although a large earthquake has occurred in this area,it is still at a high stress level.Therefore,it is preliminarily judged that there is a risk of a large earthquake along the Kalpingtag thrust tectonic fault zone.

关 键 词：柯坪块体 凹凸体 B值 双差地震定位法 地震危险性 

分 类 号：P315[天文地球—地震学]