采用LOCSAT和HYPOSAT方法对新疆中深源地震重定位分析  

ANALYSIS ON RELOCTING INTERMEDIATE AND DEEP-FOCUS EARTHQUQKES IN XINJIANG USING LOCSAT AND HYPOSAT

作　　者：张勇[1] 张峰 陈亮[1] 赵江涛 奥斯曼·阿木丁 邱大琼[1] ZHANG Yong;ZHANG Feng;CHEN Liang;ZHAO Jiang-tao;Aosiman Amuding;QIU Da-qiong(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,新疆乌鲁木齐830011

出　　处：《内陆地震》2021年第2期195-199,共5页Inland Earthquake

基　　金：新疆地震科学基金(201819);地震科技星火计划公关项目(XH18055)。

摘　　要：为了整理地震数据,研究其特征,为地震预警做准备,分析2010~2017年的新疆阿克陶、皮山、叶城和塔什库尔干及相邻兴都库什地区M≥3.0的187个中深源地震。对于同一地震事件,使用相同的地球模型、地震台站及震相到时数据,以震相清晰为原则,去除波形叠加,选取包围震中较好的台站,采用适用于中深源地震定位的LOCSAT和HYPOSAT方法重新定位。通过对2种方法定位结果的对比,将所得结果与USGS结果进行比较,发现HYPOSAT定位方法在深度定位上更加准确,2种方法在发震时刻和震中经纬度上差别不大。这部分中深源地震分布整体呈"八"字状,"八"字左侧地震震源深度大多集中在180 km处,"八字"右侧地震震源深度大多集中在100 km处。In order to sort out seismic data,study its characteristics and prepare for earthquake warning,we analyze more than 187 intermediate and deep-focus earthquakes whose magnitudes are over M3.0 in the area among Aketao,Pishan,Yechen and Tashkurgan of Xinjiang and its ambient Hindu Kush region from 2010 to 2017.We use the same stations,the same velocity model and the same phases’arrival time data to relocate the same earthquake event using LOCSAT and HYPOSAT methods.Then,we compare the results of above two methods with the results of USGS.In the end,we find the original time and the epicenters of earthquakes are close,but HYPOSAT method is better in depth for the intermediate and deep-focus earthquakes in researching area.The whole distribution of the earthquakes lies like a Chinese character‘八’,the depth of earthquakes on the left are near 180 km,and those on the right are near 100 km.

关 键 词：中深源地震 地震定位 LOCSAT HYPOSAT 

分 类 号：P315.7[天文地球—地震学]