- 责任者：Ruan Xiang (Earthquake Administration of Sichuan ; Chengdu 610041 ; China) ; Cheng Wanzheng
- 刊名：Northwestern Seismological Journal
- 出版年：2011
- 卷期：33(1)
- 关键词：震源机制 ; focal mechanism ; 震源参数 ; hypocenter parameters ; 安宁河断裂带 ; Anninghe Fault Zone
- 页码：p.46-50
- 图表：6 illus., 11 refs.
- 分类号：0500
- issnNo：ISSN1000-0844
- isbnNo：CN62-1048/P
Based on the middle-small earthquake data in Anninghe-Zemuhe earthquake belt, 100 focal mechanisms of ML≥3.0 earthquakes are calculated. Using mechanical axis tensor method the direction of mean stress field of Anninghe-Zemuhe earthquake belt is given, with direction of NW-SE. The strike-slip earthquakes account for large proportion in all earthquakes and located in narrow areas. The plane and section of apparent stress are plotted after calculating parameters of source spectrum of small earthquakes. If relative high value area of apparent stress is thought as indicant of future strong earthquake risk, north segment of Anninghe fault and mid-north segment of Zemuhe Fault are the potential strong earthquake risk area. oft-com:office:office" />