新疆南天山地区震群前兆性分析  

PRECURSOR ANALYSIS OF EARTHQUAKE SWARMS IN SOUTH TIANSHAN MOUNTAIN,XINJIANG

作　　者：邓明文 宋春燕[1,2] DENG Ming-wen;SONG Chun-yan(Korla Seismic Station,Earthquake Administration of Xinjiang Uygur Autonomous Region,Korla 841200,Xinjiang,China;Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局库尔勒地震台,新疆库尔勒841200 [2]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2021年第2期179-184,共6页Inland Earthquake

基　　金：中国地震局“三结合”课题(3JH-202001098)。

摘　　要：2017年6月以来新疆南天山乌恰—伽师地区和库车—拜城地区的小震群活跃,共发生5次中强地震。系统整理2017年6月1日~2019年2月28日新疆南天山地区17次小震群,分析震群序列特征,讨论这些小震群与中强地震的对应关系。结果表明:(1)在乌恰―伽师地区的小震群中前兆震群占比67%,前兆震群与之后的4次5级地震具有显著的对应关系。(2)在库车―拜城地区的多数震群为非前兆震群,前兆震群占28%,一次前兆震群对应2017年9月16日库车M_(S)5.7地震,结果显示该组震群无前兆意义。Since June 2017,small earthquake swarms have been active in Wuqia Jiashi area and Kuqa Baicheng area of Southern Tianshan Mountain,Xinjiang,with a total of 5 moderately strong earthquakes.17 small earthquake swarms in South Tianshan area of Xinjiang from June 1 st,2017 to February 28 th,2019 are systematically sorted out,the characteristics of earthquake swarm sequence are analyzed,and the corresponding relationship between these small earthquake swarms and medium strong earthquakes is discussed.The results show that:(1)among the small earthquake swarms in Wuqia Jiashi area,the precursory earthquake swarms account for 67%.The precursory earthquake swarms have a significant corresponding relationship with the following four earthquakes of M_(S)5.(2)Most of the swarms in Kuqa Baicheng area are non precursory swarms,accounting for 28%.One precursory swarms corresponds to the Kuqa M_(S)5.7 earthquake on September 16 th,2017.The results show that this group of swarms has no precursory significance.

关 键 词：新疆南天山地区 震群序列 参数特征 前兆震群 

分 类 号：P315.7[天文地球—地震学]