2013年甘肃岷县漳县M_S6.6地震前甘东南地区前兆异常分析  

Analysis on the Some Typical Precursory Anomalies before Minxian-Zhangxian M_S6.6 Earthquake in Southeast Area of Gansu Province in 2013

作　　者：曾文浩 杨兴悦 史继平 黄琤琤 宋婷 

机构地区：[1]甘肃省地震局,甘肃兰州730000 [2]丹江口市地震局,湖北丹江口442700

出　　处：《地震研究》2015年第3期341-351,517,共11页Journal of Seismological Research

基　　金：甘肃省地震局地震科技发展基金(面上基金2013M03);中国地震局"三结合"课题(142801)联合资助

摘　　要：通过分析甘东南地区的前兆资料,认为2013年7月22日岷县漳县MS6.6地震前震中距300 km内甘肃部分前兆资料有明显的中短期异常及典型的短临异常。用从属函数法定量提取了水氡和水位资料中短期异常,分析了异常特征,并对岷县漳县MS6.6地震前水氡、水位、水温、地电阻率及形变资料的异常特征进行了重点分析,发现地震前甘东南地区的几项地形变资料出现了明显的中短期异常,部分水氡、水位、水温和地电阻率资料存在明显的短临异常。By analyzing the precursory data in the southeast area of Gansu Province before M inxian- Zhangxian MS6. 6earthquake on Jul. 22,2013,we found that there appeared the obvious mid-short anomalies and typical short impending anomalies in the precursory data in the area of 300 km from the epicenter. Then we quantitatively extracted the mid-short term anomalies of water radon and water level by subordinate function method,and took a brief analysis of anomalies characteristics of it. Then we focused on analyzing the anomalies characteristics of water radon,water level,water temperature,geoelctrical resistivity and deformation data before M inxian-Zhangxian MS6. 6 earthquake,and obtained that there exited obvious mid-short impending anomalies in several ground deformation data,and the obvious short impending anomalies in some data of water radon,water level,water temperature,geoelctrical resistivity in the southeast area of Gansu Province.

关 键 词：岷县漳县Ms6.6地震 前兆异常 地下流体 地电阻率 地形变 甘东南地区 

分 类 号：P315.72[天文地球—地震学]