皖西南地区中强地震前后地磁资料变化特征  

CHARACTERISTIC ANALYSIS OF GEOMAGNETIC DATA BEFORE AND AFTER MODERATELY STRONG EARTHQUAKES IN SOUTHWEST AREA OF ANHUI PROVINCE

作　　者：戴苗 李军辉[2] 刘坚 李明 蒋玲霞 

机构地区：[1]湖北省地震局,武汉430071 [2]安徽省地震局,合肥230031

出　　处：《大地测量与地球动力学》2013年第A01期143-146,151,共5页Journal of Geodesy and Geodynamics

基　　金：武汉市科技计划项目(2013060501010166)

摘　　要：计算并分析了2011年1月19日安庆M4.8地震和2011年9月10日瑞昌-阳新M4.6地震前后震中周边主要地磁台站地磁转换函数参数的变化特征,总结了安庆地震前华东片主要地磁台站地磁资料垂直分量的变化特征。结果表明:在两次中强地震前,武汉、泾县、金寨三个地磁台的转换函数的部分参数出现了不同程度的异常变化;安庆地震前,中国大陆东部地磁低点时间出现位移,地磁日变形态亦发生了明显的畸变。The variation characteristic of transfer function parameter of geomagnetic data is analyzed which recorded by observatories in the time before and after M4.8 Anqing earthquake in January 19, 2011 and M4.6 Ruichang-Yangxin earthquake in September 10, 2011. The variation of geomagnetic field in the Z component before Anqing M4.8 earthquake in east China is also summarized. The results show that some transfer function parameters of Wuhan observatory, Jingxian observatory and Jinzhai observatory appeared different degrees of abnormalities be- fore and after the two moderately strong earthquakes. The low-point time of the geomagnetic vertical component in east China appears anomalous features before the Anqing earthquake. Daily variation of geomagnetic field arises obvious distortion.

关 键 词：转换函数 低点位移 中强地震 地磁 皖西南地区 

分 类 号：P318.5[天文地球—固体地球物理学]