天津地区地电暴与磁暴的对比分析  

Comparative Analysis of Geo-Electric Storm and Geomagnetic Storm in Tianjin Area

作　　者：龚永俭[1] 程立康[1] 张长轩 刘学领[1] 徐学恭[1] 康健[1] 王建国[1] GONG Yongjian;CHENG Likang;ZHANG Changxuan;LIU Xueling;XU Xuegong;KANG Jian;WANG Jianguo(Tianjin Earthquake Agency,Tianjin 300201,China)

机构地区：[1]天津市地震局

出　　处：《华南地震》2019年第4期75-83,共9页South China Journal of Seismology

基　　金：中国地震局地震科技星火计划攻关项目“天津地球物理台网智能化产出与应用研究”（XH20002）;中国地震局地震监测、预报、科研三结合课题“利用地磁相对记录对比研究天津地区地电场变化特征”（CEA-JC/3JH-170308）;前兆数据跟踪分析产品产出系统升级完善（8801）

摘　　要：通过对磁暴、地电暴要素的识别和统计,结合磁暴期间同台站地磁场H分量变化率与地电场NS向、EW向数据的相关性分析,对2016年7月至2018年6月天津地区宝坻新台、静海台、徐庄子台3个台站记录到的7次急始磁暴与地电暴进行了对比分析,结果表明:①天津地区3个台站地磁场H分量在同一磁暴期间的变幅大致相同,但地电场相应测项在同一地电暴期间的最大变幅却有较大差异;②暴时地磁场H分量变幅、地电场各测项最大变幅与地磁K指数的大小均有一定关联,但并非完全成正比例关系;③3个台站暴时地磁场H分量变化率与同台站地电场各测项的相关系数相比,宝坻新台最高,徐庄子台次之,静海台最低,暴时磁场变化率与同台站地电场EW向的相关性较高,NS向的相关性则较低。Based on the identification and statistics of the elements of magnetic storm and geoelectric storm,combined with the correlation analysis of the H component variation rate of geomagnetic field at the same station during the magnetic storm and the NS and EW direction data of geoelectric field,the seven abrupt initial magnetic storms recorded at new Baodi station,Jinghai station and Xuzhuangzi station in Tianjin from July 2016 to June 2018 were compared and analyzed.The results show that:the amplitude of H component of geomagnetic field at three stations in Tianjin region is approximately the same during the same geomagnetic storm,but the maximum amplitude of the corresponding items of geoelectric field varies greatly during the same geoelectric storm;the amplitude of H component of geomagnetic field and the maximum amplitude of each item of geoelectric field are related to the magnitude of geomagnetic K index,but not completely proportional to it;the variation of H component of geomagnetic field during three station storms compared with the correlation coefficients of each item of geoelectric field measured at the same station,new Baodi station has the highest correlation coefficient,Xuzhuangzi station takes the second place,Jinghai station has the lowest correlation coefficient.The correlation between the change rate of magnetic field and the EW direction of geoelectric field at the same station is higher,while the correlation of NS direction is lower.

关 键 词：地电场 地磁场 地电暴 磁暴 K指数 天津 

分 类 号：P315.7[天文地球—地震学]