地震地磁观测与研究2017，Vol.38Issue(4)：26-31,6.DOI:10.3969/j.issn.1003-3246.2017.04.005
2016年6月23日河北尚义4.0级地震发震背景
The seismogenic background of Shangyi M 4.0 earthquake on June 23, 2016
摘要
Abstract
An M 4.0 earthquake occurred in Shangyi on June 23,2016.It was a significant activity in border area of Hebei,Shanxi and Inner Mongolia.Based on the introduction of earthquake sequence,focal mechanisms and geological structure,we deeply analyzed the seismogenic background from stress and velocity structure.This earthquake occurred in the background of low activity.Before the earthquake,the crustal stress tensor variance is low and the apparent stress is high in this place.There is a high and low speed transition zone with high velocity in the underground medium.It indicates that the stress level in this area is high,the strain can be easily accumulated,and there is the possibility of moderate and strong earthquakes.The epicentral position of this earthquake has a good correspondence with the low value of the stress tensor variance,the high value area of the apparent stress,the high and low speed transition in the underground medium before the earthquake.The occurrence of this earthquake has certain directive significance for the future moderate of strong earthquakes in Jin-Meng-Meng cross area.关键词
震源机制/应力张量方差/视应力/速度结构Key words
focal mechanism/stress tensor variance/apparent stress/velocity structure引用本文复制引用
郭蕾,宫猛,王晓山,王想,王亚茹..2016年6月23日河北尚义4.0级地震发震背景[J].地震地磁观测与研究,2017,38(4):26-31,6.基金项目
河北省地震局星火项目(项目编号:DZ2015017012,DZ20170509039) （项目编号:DZ2015017012,DZ20170509039）
2015年河北省科技支撑计划项目(项目编号:15275402D) （项目编号:15275402D）
