2016年青海门源MS6.4地震前的地磁变化

The Variations of Geomagnetic before the Menyuan MS6.4 Earthquake

摘要:

2016年青海门源MS6.4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。

Abstract:

A variety of geomagnetic anomaly was appeared in the geomagnetic stations around epicenter before Menyuan MS6.4 earthquake. For example, There are abnormalies in the Z component LURR (load/unload response ratio)、the Z component daily variation ratio、the Z component 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.