地震地磁观测与研究2017，Vol.38Issue(6)：34-40,7.DOI:10.3969/j.issn.1003-3246.2017.06.007
长江三峡库区秭归杨林桥镇震群成因
The genesis of the Yanglinqiao small earthquake swarm, Zigui, Three Gorges Reservoir region
摘要
Abstract
The small earthquake swarm was recorded by the Three Gorges Digital Seismic Network during March and June, 2016. Analysis work such as double difference location, focal-mechanism solutions and ifeld survey were carried out on larger events in order to determine source parameters and their spatiotemporal variation. The results indicate that the small earthquake events manly distribute in a 2 km×3 km area in Yanglinqiao, with an obvious spreading direction different from the strike direction of Xiannvshan fault, Jiuwanxi fault and Tianyangping fault. Besides, the small earthquake swarm locates more than 10 km away from stem stream of the Yangtze River, and has no water relation with Three Gorges Reservoir. Taking into consideration that there are karst caves distributed on the earthquake swarm distribution area and the rainfall is rich; the small earthquake swarm may attribute to karst collapse events.关键词
小震群/双差定位/震源机制解/岩溶塌陷/Snoke方法Key words
small earthquakes swarm/double difference positioning/focal mechanism solution/karst collapse/Snoke method引用本文复制引用
董建辉,叶浩,徐玉聪,刘华清..长江三峡库区秭归杨林桥镇震群成因[J].地震地磁观测与研究,2017,38(6):34-40,7.基金项目
三峡工程库区水位变化引起库区介质特性变化与水库地震活动关系的研究 （）
