Gravity variation associated with Wenchuan earthquake in western Sichuan  

作　　者：Zhu Yiqing Liu Fang Liang Weifeng Xu Yunma 

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

出　　处：《Geodesy and Geodynamics》2011年第1期55-60,共6页大地测量与地球动力学（英文版）

基　　金：supported by the National Natural Science Foundation(40874035);a special earthquake research project grant from China Earthquake Administration(200908029)

摘　　要：Based on the data of mobile gravity observation from 1998 to 2008 in western Sichuan, spatial dynamic variation results of regional gravity field are obtained. The relationship between the gravity variation features and Wenchuan Ms8.0 earthquake is systematically analyzed. The results show： 1 ） Gravity variation is closely related to active fault tectonics, and gravity measurement can better reflect material migration following crustal tectonic activity near active fault. 2）The gravity field appeared a wider range regional gravity variation during Wenchuan earthquake occurrence. The dynamic patterns of gravity field demonstrates the evolution process of gravity field ： quasi - homogeneous state non - homogeneous state-earthquake occurrence.Based on the data of mobile gravity observation from 1998 to 2008 in western Sichuan, spatial dynamic variation results of regional gravity field are obtained. The relationship between the gravity variation features and Wenchuan Ms8.0 earthquake is systematically analyzed. The results show： 1 ） Gravity variation is closely related to active fault tectonics, and gravity measurement can better reflect material migration following crustal tectonic activity near active fault. 2）The gravity field appeared a wider range regional gravity variation during Wenchuan earthquake occurrence. The dynamic patterns of gravity field demonstrates the evolution process of gravity field ： quasi - homogeneous state non - homogeneous state-earthquake occurrence.

关 键 词：western Sichuan gravity observation crustal movement gravity variation Wenchuan earthquake 

分 类 号：P315.7[天文地球—地震学] P618.130.2[天文地球—固体地球物理学]