摘要
对2012年10月31日三峡库区屈原镇ML3.8小震群活动的研究表明,是一次与三峡水库蓄水过程直接相关震群活动;地震主要聚集在仙女山断裂带北端,深约10 km,分布在结晶基底附近;震源体的线性尺度较小,主要限定在5 km的范围;主震和较大地震表现为较典型的构造型地震特征;震群活动为水库高水位蓄水引发仙女山断裂北端构造应力调整,其震群为水库触发型构造地震。
The largest magnitude is ML3. 8 small earthquake swarm which occurred on October 30, 2012, Quyuan town of Zigui County in the Three Gorges reservoir region. The studies show that the small earthquake swarm are directly related to the Three Gorges Reservoir impounding; the earthquake swarm gathered in the northern end of Xiannvshan fault zone, earthquakes most located within 10 km near the crystalline basement; linear scale of hypocenter body is smaller, mainly limited radius of 5 km of range ; mainshock and larger seismic performance typical stereotype earthquake characteristics; earthquake swarm triggered the fault structure Xiannvshan stress to adjust in the high water level of the reservoir impounding, small earthquake swarm are reservoir triggered tectonic earthquakes.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第2期31-34,共4页
Journal of Geodesy and Geodynamics
基金
中国长江三峡工程开发总公司专项基金(SXSN/2377)
中国地震局地震研究所所长基金(IS201246114)
关键词
小震群
水库触发型构造地震
震源机制
频谱
震源体
small earthquake swarm
reservoir triggered tectonic earthquake
focal mechanism solution
spectrum
hypocenter body
