大地测量与地球动力学2017，Vol.37Issue(3)：302-305,4.DOI:10.14075/j.jgg.2017.03.017
太康Ms4.6级地震与重力场演化特征探讨
Research on Evolution Characteristics of Gravity Field Before and After Taikang Ms4.6 Earthquake
摘要
Abstract
Based on finely processed mobile gravity observation data acquired between 2009～2012,along with seismic sounding profiles in southern north China,this paper discusses the evolutionary characteristics of surface gravity changes caused by the Taikang Ms4.6 earthquake.The gravity field before the earthquake shows a four-quadrant characteristic,which is the precursor of a strike-slip earthquake on Xuchang-Taikang fault.The positive and negative gravity fields correspond exactly to the compression zone and tension zone of the focal mechanism solutions.The timing diagram of gravity difference and point value shows that the fracture strain accumulates mainly on the west and south of the Xuchang-Taikang fault,where there is a seismic low-velocity body in the crust.The strain accumulated and the different seismic velocity boundary provided conditions for the earthquake.关键词
太康地震/重力场/地震构造/地震孕育Key words
Taikang earthquake/gravity field/seismic tectonic/earthquake gestation分类
天文与地球科学引用本文复制引用
李真,秦建增,贾宇鹏,谢汝一,檀玉娟,罗翔飞..太康Ms4.6级地震与重力场演化特征探讨[J].大地测量与地球动力学,2017,37(3):302-305,4.基金项目
中国地震局地球物理勘探中心青年优秀科技人才专项(SFGEC2014009) （SFGEC2014009）
中国地震局地震行业科研专项(201508009-08).Outstanding Youth Project of Geophysical Exploration Center,CEA,No.SFGEC2014009 （201508009-08）
Special Fund for Earthquake Research of CEA,No.201508009-08. （）
