大岗山水库库区蓄水前后三维速度成像研究  

A Study of Three-dimensional Velocity Imaging Before and After Impoundment in Dagang Mountain Reservoir

作　　者：庄园旭 丁勇 杜瑶[1] 冯静[1] 康宏[1] 王余伟[1] ZHUANG Yuanxu;DING Yong;DU Yao

机构地区：[1]四川省地震局,四川成都610041

出　　处：《科技创新与应用》2022年第11期1-18,共18页Technology Innovation and Application

基　　金：四川省地震局地震科技专项(LY1811);四川省地震局科学技术处科研项目(CDT-XCHPD-GW-C-[2020]-003)资助。

摘　　要：利用大岗山水库地震监测台网2014年2月1日至2017年12月31日记录的数据,采用双差层析成像方法获得大岗山水库库区蓄水前后三维速度结构及地震精确定位结果。成像结果显示库区速度结构存在明显横向不均匀性,蓄水前后速度结构未发生较大变化。精确定位结果显示地震呈条带状分布,蓄水后地震活动性增强。Based on the data recorded by the earthquake monitoring network of Dagang Mountain Reservoir from February 1,2014 to December 31,2017,the results of three-dimensional velocity structure and accurate earthquake location before and after impoundment in Dagang Mountain reservoir area are obtained using double-difference tomography method.The imaging results show that there is obvious lateral inhomogeneity in the velocity structure of the reservoir area,and there is no significant change in the velocity structure before and after impoundment.The accurate location results show that the earthquake distribution is banded,and the seismicity is enhanced after impoundment.

关 键 词：大岗山水库 层析成像 速度结构 地震精确定位 

分 类 号：P315[天文地球—地震学]