2018年冀南地区岩石圈磁场变化分析  

ANALYSIS ON THE VARIATION OF LITHOSPHERIC MAGNETIC FIELD IN SOUTHERN HEBEI PROVINCE IN 2018

作　　者：王朝景 李博[1] 苏树朋[1] 张海洋 刘德强 赵慧琴[1] 毛丰龙 WANG Zhaojing;LI Bo;SU Shupeng;ZHANG Haiyang;LIU Deqiang;ZHAO Huiqin;MAO Fenglong(Baoding Center Seismic Station,Hebei Earthquake Agency,Baoding 071000,China)

机构地区：[1]河北省地震局保定中心台,河北保定071000

出　　处：《高原地震》2020年第3期9-12,29,共5页Plateau Earthquake Research

基　　金：河北省地震科技星火计划重点项目(项目编号:DZ20190422046)资助。

摘　　要：对冀南地区2018年春、秋两期的流动地磁矢量资料进行了处理,结合河北隆尧3.0级与临漳3.6级地震,对该区的岩石圈磁场变化特征进行了分析。结果表明2018年4~9月冀南地区的岩石圈磁场变化中各要素总体变化相对较小,呈现不同的变化趋势。同时发现隆尧3.0级与临漳3.6级地震震前均呈现出不同程度的震磁异常,其中磁偏角D、磁倾角I、水平矢量H与垂直矢量Z异常较为明显,但两个震例的异常特征有所差异。Based on the mobile geomagnetic vector data in spring and autumn of 2018 in Southern Hebei Province,a nd combined with the earthquakes of M3.0 in Longyao County and M3.6 in Linzhang County of Hebei Province,the characteristics of the lithospheric magnetic field variation in the region are analyzed.The results show that the lithospheric magnetic field variation in southern Hebei Province in April to September in 2018 is relatively small and shows different trends.At the same time,it is found that the Longyao M3.0 earthquake and Linzhang M3.6 earthquake have different degrees of seismomagnetic anomalies before their occurrence.The anomalies of the magnetic declination D,magnetic inclination I,horizontal vector H and vertical vector Z are more significant,but the anomaly features of the two earthquakes are different.

关 键 词：流动地磁 岩石圈磁场变化 震磁异常 

分 类 号：P318.5[天文地球—固体地球物理学]