山西运城4.9级地震前后重力场变化特征分析  

Gravity Field Variation before and after the M_L4.9 Yuncheng Earthquake in Shanxi Province

作　　者：罗翔飞[1] 李真[1] 李德庆[1] 李勇江[1] 谢汝一[1] 贾宇鹏[1] 

机构地区：[1]中国地震局地球物理勘探中心,河南郑州450000

出　　处：《地震工程学报》2017年第A01期65-71,共7页China Earthquake Engineering Journal

基　　金：地震行业科研专项(201208009)

摘　　要：通过对山西临汾—晋陕交界地区重力复测资料系统分析,结合地质、地壳深部构造资料,讨论了2016年3月12日山西运城盐湖区M_L4.9地震前后重力场演化特征。结果表明:重力场动态图像较清晰地反映了重力场动态变化与发震的演化过程,由准均匀态-非均匀态-发震-震后恢复。Based on systematic analysis of repeatedly measured gravity data in the Linfen-Shanxi border area combined with deep crustal structure data, evolution characteristics of the gravity field in the Yuncheng Saline Lake, Shanxi province before and after the M14.9 earthquake onMarch 12,2016 are discussed. The dynamic patterns of the gravity field clearly reflect the dynam-ic change of gravity field and the evolution process of M l4.9 earthquake, that is quasi-homogene-ous state-non homogeneous state-earthquake occurrence-post-quake recovery. In addition,gravity variation characteristics and their relation to the earthquake are analyzed.

关 键 词：重力场变化 联合平差 构造 运城M_L4.4地震 

分 类 号：P35[天文地球—空间物理学]