地震地磁观测与研究2017，Vol.38Issue(2)：1-6,6.DOI:10.3969/j.issn.1003-3246.2017.02.001
2015年11月22日广东徐闻ML 4.2地震震源机制解及精定位分析
Focal mechanism solution and accurate location of Xuwen ML 4.1 earthquake in Guangdong Province on Nov.22, 2015
摘要
Abstract
The Xuwen ML 4.2 earthquake occurred on July 31,2016.Base on the records of Hainan Earthquake Network,we obtained the focal mechanism of the earthquake with the "cut and paste" (CAP) method.The result shows:the strike,dip and rake angles of nodal plane Ⅰ are 110°,84° and-158°,respectively;Those of other nodal plane are 18°,69° and-5°.It is concluded that the seismogenic fault of Xuwen ML 4.2 earthquake is a strike-slip fault with normal type.This is in agreement with the movement characteristic of the Puqian-Qinglan fault which belongs to the strike-slip fault.Using the double difference location method,183 ML ≥ 1.0 earthquakes from January 2000 to June 2016 are relocated.The relocating results of 146 earthquakes are obtained.The result shows that the source distributions are no longer confined to the 10 km,but is a vertical zonal distribution.This is consistent with the activity characteristic of the new tectonic movement which is mainly vertical difference activity in Leiqiong region.关键词
CAP方法/双差定位法/震源机制解/震源深度/地震构造Key words
CAP method/double difference location method/focal mechanism/focal depth/seismic structure引用本文复制引用
徐晓枫,王惠琳,胡久常,宋秀青,孙佩雯..2015年11月22日广东徐闻ML 4.2地震震源机制解及精定位分析[J].地震地磁观测与研究,2017,38(2):1-6,6.基金项目
海南省地震局青年科学基金项目(项目编号:201606) （项目编号:201606）
