Focal Mechanisms and Seismogenic Structures of the MS4.6 Ruichang-Yangxin Earthquake of 2011
详细信息
- 责任者：Zhang Lifen (Key Laboratory of Earthquake Geodesy ; Institute of Seismology ; China Earthquake Administration ; Wuhan 430071 ; China) ; Yao Yunsheng
- 刊名：Seismology and Geology
- 出版年：2013
- 卷期：35(2)
- 关键词：震源机制 ; focal mechanism ; 孕震构造 ; seismogenic tectonics ; 江西 ; Jiangxi Province ; 湖北 ; Hubei Province
- 页码：p.290-299
- 图表：illus., 1 table, 24 refs.
- 分类号：0500
- issnNo：ISSN0253-4967
- isbnNo：CN11-2192/P
摘要
Ruichang-Yangxin earthquake is another moderate-size earthquake in the Yangxin-Jiujiang area since the M5. 7 Jiujiang-Ruichang earthquake in 2005. In order to have a better understanding of the seismic activities in this area,we investigate the moment tensor solution and the seismogenic structure of Ruichang-Yangxin earthquake. Precise earthquake relocation shows that the main shock occurred on the southwestern part of the NE-trending fault and aftershocks are distributed along both NNE and NW directions. By comprehensive analysis of the earthquake distribution,isoseismal features,focal mechanism,and regional structure characteristics,it is inferred that the this earthquake is caused by the southern segment of the NNE-trending Tanlu Fault( TLF) . In addition,it has close relationship with the conjugated NW-trending fault as well.
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