华南地震2017，Vol.37Issue(3)：1-8,8.DOI:10.13512/j.hndz.2017.03.001
2016年10月广东乳源ML 2.8级震群活动特征
Seismic Activity Characteristic of Ruyuan ME 2.8 Earthquake Swarm in October, 2016 in Guangdong
摘要
Abstract
The ML 2.8 earthquake swarm occurred in Ruyuan of Guangdong province from October 7th to 26th,2016.There are 250 earthquakes recorded,including 166 ML 1.0-1.9 earthquakes and 17 ML 2.0-2.9 earthquakes,the largest earthquake of this swarm is the ML 2.8 earthquake which occurred in October 10th with the focal depth of 8km.According to the comparisons of seismic activity,wave velocity ratios and apparent stress between Ruyuan swarm and Nanshui reservoir swarm,the paper premonitory estimates that Ruyuan earthquakes which occurred under the background of low compressional stress are not the reservoir-induced earthquakes,which confirmed the southeastern coastal area's seismic activity characteristic that the seismic activity transfers from reservoir area to non-reservoir area.The Ruyuan earthquakes distribute along north-west striking valley and the mechanism of Ruyuan mainshock is left-lateral strike-slip,with normal component.Combing seismotectonic environment and field survey,the paper speculates a buried fault which may be the seismogenic of Ruyuan swarm exists from epicentral area to Wangbu of Yingde city.This fault dips to southwest,with strike angle of 310°and dip angle of 47,it may be the conjugate structure of NE Wuchuan-Sihui fault,which has close relationship with the seismicity enhance of Wuchuan-Sihui fault.关键词
乳源震群/南水水库/隐伏断裂/发震构造/吴川-四会断裂带Key words
Ruyuan swarm/Nanhui reservoir/Buried fault/Seismogenic/Wuchuan-Sihui fault分类
天文与地球科学引用本文复制引用
王小娜,邓志辉,叶东华,刘特培,刘吉平,邵叶..2016年10月广东乳源ML 2.8级震群活动特征[J].华南地震,2017,37(3):1-8,8.基金项目
国家自然科学基金面上项目(41676057)、国家自然科学基金青年科学基金项目(41604055)、2016年度震情跟踪定向任务(2016010111,2016010116)联合资助. （41676057）
