2016年青海门源M_S6.4地震前的地磁变化  

The Variations of Geomagnetic before the Menyuan M_S6.4 Earthquake

作　　者：马亮 张博 

机构地区：[1]甘肃省地震局,甘肃兰州730000

出　　处：《地震工程学报》2016年第A02期197-202,共6页China Earthquake Engineering Journal

基　　金：甘肃省地震局地震科技发展基金(2015Q07);中国地震局监测预报司2016年度震情跟踪定向工作任务资助项目(2016010414)

摘　　要：2016年青海门源M_S6.4地震发生时,地震影响范围内的台站均出现了多种地磁异常,如Z分量加卸载响应比、Z分量日变幅逐日比、Z分量21点值的空间相关、地磁低点时间存在偏移等。统计震前与震后观测到的所有地磁异常现象,提取并分析其地磁异常,可为今后利用地磁方法预测地震积累经验和震例。A variety of geomagnetic anomaly was appeared in the geomagnetic stations around epicenter before Menyuan M_S6.4earthquake.For example,There are abnormalies in the Z component LURR（load/unload response ratio）、the Zcomponent daily variation ratio、the Zcomponent 21 integral hour values spatial correlation and geomagnetic low-point time offset.Analyzing the geomagnetic anomalies before and after the earthquake is beneficial to accumulate experience and examples for prediction earthquake by geomagnetic method for the future.In this article,all geomagnetic anomalies observed before and after the earthquake are counted.During demonstrate the relationship between geomagnetic anomaly and the earthquake,spatial relation between geomagnetic stations and epicenter of the earthquake,time relation of anomalies and the earthquake was analyzed.Finally we summed up an example using geomagnetic analysis method in earthquake prediction.

关 键 词：冷龙岭断裂 加卸载响应比 日变幅逐日比 空间相关分析 地磁低点位移 

分 类 号：P315.721[天文地球—地震学]