Preseismic deformation associated with the 2014 Ms7.3 Yutian earthquake derived from GPS data

查看全文 作　　者：Chen [1]Changyun;Chen [1]Fuchao;Zheng [1]Zhijiang;Zhu [1]Shuang;Zhang [2]Junlong;Yang [2]Panxin

机构地区：[1]First Crust Monitoring and Application Center,China Earthquake Administration;[2]Institute of Earthquake Science,China Earthquake Administration

出　　处：《Geodesy and Geodynamics》索引2014年第5卷第2期,共6页

基　　金：supported by the Spark Progoram of Earthquake Science(XH13037Y);Earthquake Tracking(2014010203);the National Natural Science Fourdation of China(41372215,41272233,41174004) 摘　　要：Based on analysis of the GPS data during 1999-2007,2009-2011,and 2011-2013 mainly from the Crustal Motion Observation Network of China,we obtained the GPS horizontal velocity field,the GPS strain rate field,and the profiles across the southwestern segment of the Altyn Tagh Fault zone and its adjacent regions and identified the different characteristics of horizontal crustal deformation fields and profiles during different periods. The results show that,before the February 12,2014,Ms7. 3 Yutian earthquake,the laevorotation deformation along the southwestern segment of the Altyn Tagh Fault zone increased about 3. 3 mm /a during 2011-2013,relative to that in 2009-2011,and the GPS strain rate field distributed in the southeastern segment of the Altyn Tagh Fault during 2011-2013 increased obviously. These abnormal changes may be regarded as precursors to the Ms7. 3 Yutian earthquake. 关键词：GPS数据形变场地震阿尔金断裂带水平速度场震前地壳运动应变率场

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Preseismic deformation associated with the 2014 Ms7.3 Yutian earthquake derived from GPS data

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