地震前红山台地磁变化及异常指标分析  

GEOMAGNETIC VARIATION AND ANOMALY INDEX ANALYSIS OF HONGSHAN EARTHQUAKE STATION BEFORE EARTHQUAKES

作　　者：畅国平[1] 王秀敏[1] 王志敏[2] 和少鹏 张明哲 张波[1] 尹小兵[1] 胡秀娟[1] 王利兵[1] CHANG Guoping;WANG Xiumin;WANG Zhimin;HE Shaopeng;ZHANG Mingzhe;ZHANG Bo;YIN Xiaobing;HU Xiujuan;WANG Libing(Hongshan Seismic Station, Hebei Earthquake Agency,Hongshan 055350,China;Chi cheng Seismic Station, Hebei Earthquake Agency, Chicheng 075000,China)

机构地区：[1]河北省地震局红山基准台,河北隆尧055350 [2]河北省地震局赤城地震台,河北赤城075000

出　　处：《高原地震》2020年第1期1-7,共7页Plateau Earthquake Research

基　　金：中国地震局监测、预测、科研三结合项目(项目编号:170403)资助。

摘　　要：本文应用加卸载响应比、日变幅逐日比及空间相关分析方法,分析了2002~2015年红山地震台地磁Z分量观测资料异常变化与Ms≥4.0地震之间的关系。结果表明,异常值加卸载响应比P(Z)≥3.0,日变幅逐日比Y(Z)≥2.6,相关系数R(Z)≤0.90,且各异常值出现超过3个月及以上,震中距400 km以内通常有Ms4.0级以上地震发生。研究结果提供了适用于红山台的地磁分析异常指标,同时对后续地震的预报研判有所帮助。In this paper,load/unload response ratio,ratio of daily amplitude variation and spatial correlation analysis methods are used to analyze the relationship between the abnormal variation of geomagnetic z-component data and Ms≥4.0 earthquake in Hongshan seismic station from 2002 to 2015.The results show that the abnormal value of the load/unload response ratio P(Z)is greater than or equal to 3,the daily variation ratio Y(Z)is greater than or equal to 2.6,the correlation coefficient R(Z)is less than or equal to 0.90,and abnormal values appeared more than 3 months or more,earthquakes of magnitude Ms4.0 or more usually occur within 400 km epicentral distance.Using these parameters can be helpful for the prediction of subsequent earthquakes,at the same time,the geomagnetic analysis and prediction parameters applicable to Hongshan station are provided.

关 键 词：地磁 异常指标 地震前兆 加卸载响应比 日变幅逐日比 相关系数 

分 类 号：P315.721[天文地球—地震学]