基于Matlab的三峡水库地震数据处理与分析  

Matlab-based Seismic Data Processing and Analysis of Three Gorges Reservoir

作　　者：蔺永[1] 马文涛[1] 

机构地区：[1]中国地震局地质研究所,北京100029

出　　处：《震灾防御技术》2014年第3期447-453,共7页Technology for Earthquake Disaster Prevention

基　　金：中国地震局课题(2200408);国家科技支撑课题(2008BAC38B04)资助

摘　　要：本文以Matlab为平台,编制了相应的程序代码,实现了SAC二进制数据读取、地震观测报告数据检验、频谱分析、地震数据的互相关计算和各种地震数据成图等项功能,并将它们运用于长江三峡水库地震加密台网数据的处理。结果表明,三峡库区地震都属于水库诱发地震,在仙女山断裂过江段、九湾溪断裂附近的地震属于断层因蓄水诱发的错动事件;巴东库区神龙溪两岸地震明显呈现出3条线性分布,这是由于水库蓄水后库水从神龙溪两岸等地下暗河渗入而诱发的地震;在长江三峡库区泄滩乡以西的两岸则存在着一些与蓄水相关的塌陷地震。Taking Matlab as a platform to read SAC binary data,we tested the seismic report data,performed spectral analysis,calculated cross-correlation and seismic data mapping.We also used our Matlab code to process the seismic data of Three Gorges Reservoir.Our results show that earthquakes around Three Gorges Reservoir are induced by the reservoir.Along Xiannvshan fault and Jiuwanxi fault earthquakes are induced by fault storage.Along Shenlong river in the reservoir area,earthquakes displayed three linear distributions in northem Badong county,which was related to water seeping into the ground through underground rivers.There also exist some collapse induced earthquakes in west Three Gorges Reservoir near Xietan village.

关 键 词：MATLAB 水库地震 SAC数据读取与分析 长江三峡水库 

分 类 号：P315.728[天文地球—地震学]