Temporal variation of gravity field before and after Wenchuan Ms8.0 earthquake  

作　　者：Zhu Yiqing Liu Fang Guo Shusong 

机构地区：[1]Second Crust Monitoring and Application Center, CEA, Xi＇ an 710054, China

出　　处：《Geodesy and Geodynamics》2011年第2期33-38,共6页大地测量与地球动力学（英文版）

基　　金：supported by the Special Earthquake Research ProjectGrant by China Earthquake Administration(201008007);NationalNatural Science Foundation of China(40874035)

摘　　要：Absolute and relative gravity data during 1998 to 2008 were used to study gravity field and temporal variation in the North-South seismic-belt region, and their correlation with seismic activities before and after Wenchuan Ms8.0 earthquake. The temporal variation of gravity field shows that the portentous information of the gravity field reflects the development and occurrence of earthquake more clearly. The variations of gravity field are inhomogeneous in the space-time distribution, and are associated with the development and occurrence of the Wenchuan Ms8.0 earthquake, also closely connected with active fault tectonics.Absolute and relative gravity data during 1998 to 2008 were used to study gravity field and temporal variation in the North-South seismic-belt region, and their correlation with seismic activities before and after Wenchuan Ms8.0 earthquake. The temporal variation of gravity field shows that the portentous information of the gravity field reflects the development and occurrence of earthquake more clearly. The variations of gravity field are inhomogeneous in the space-time distribution, and are associated with the development and occurrence of the Wenchuan Ms8.0 earthquake, also closely connected with active fault tectonics.

关 键 词：Wenchuan earthquake gravity changes dynamic process PRECURSOR PREDICTION 

分 类 号：P312.1[天文地球—固体地球物理学] P315.7[天文地球—地球物理学]