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 ML4.9 Yuncheng Earthquake in Shanxi Province

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ML4.9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 ML4.9 earthquake on March 12, 2016 are discussed. The dynamic patterns of the gravity field clearly reflect the dynamic change of gravity field and the evolution process of ML4.9 earthquake, that is quasi-homogeneous state-non homogeneous state-earthquake occurrence-post-quake recovery. In addition, gravity variation characteristics and their relation to the earthquake are analyzed.