2016年12月8日呼图壁M_S6.2地震余震序列精定位研究  

RELOCATION OF MAINSHOCK AND AFTERSHOCKS OF HUTUBI EARTHQUAKE WITH M_S6.2 OCCURRED ON DECEMBER 8^(TH),2016

作　　者：孔祥艳[1,2] 陈向军[2] 刘建明[2] 钟世军[3] KONG Xiang-yan CHEN Xiang-jun LIU Jian-ming ZHONG Shi-jun(Institute of Geophysics,China Earthquake Adiministration, Beijing 100081 ,China Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011 ,Xinjiang,China Beijing Earthquake Agency, Beijing 100080, China)

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]新疆维吾尔自治区地震局,新疆乌鲁木齐830011 [3]北京市地震局,北京100080

出　　处：《内陆地震》2017年第3期237-241,共5页Inland Earthquake

基　　金：中国地震局地震科技星火计划(XH17043Y);中国地震局测震台网青年骨干培训专项任务(20170627);新疆地震科学基金(201711)

摘　　要：使用双差定位法对2016年12月8日新疆呼图壁M_S6.2地震及693个余震进行了重新定位,获得了477个地震的震源位置参数。结果表明:余震主要呈近东西向分布在准噶尔盆地南缘断裂的北侧,与准噶尔盆地南缘断裂的走向一致,余震集中分布在主震的西部,重定位后主震与准噶尔盆地南缘断裂的距离明显缩短。根据震源机制解和余震序列的空间分布特征可以初步推断,准噶尔盆地南缘断裂是呼图壁地震的主要发震构造。Mainshock and aftershocks of Hutubi earthquake with MS6. 2 on December 8th,2016 were relocated by applying the double difference method,and we relocated 477 earthquakes in Hutubi region. The earthquake relocation results showed that aftershocks were distributed nearly east-west in north side of southern margin of Junggar Basin fault,and they were mainly distributed in western region of the mainshock. The distance between mainshock after relocation and the southern margin of Junggar Basin fault was obviously shortened. Combined with focal mechanism and spatial distribution of mainshock and aftershocks,it was inferred that the southern margin of Junggar Basin fault was the main seismogenic structure of Hutubi earthquake.

关 键 词：呼图壁MS6.2地震 余震序列 双差定位 准噶尔盆地南缘断裂 

分 类 号：P315.7[天文地球—地震学]