摘要
建立河北及周边地区的岩石圈磁场分布模型,结合1970—2020年该区发生的M_(S)≥5.0地震,对岩石圈磁场的空间分布、震磁特征进行分析。结果表明:河北及周边地区岩石圈磁场的总体分布较为平稳,河北北部的量值高于南部,燕山地块量值高于华北平原地块,断裂构造发育的地区岩石圈磁场量值较低;M_(S)≥5.0地震震中多分布在岩石圈磁场的低值区、零值线附近。
In this paper,the distribution model of lithospheric magnetic field in Hebei and its surrounding areas is established.Combined with the earthquakes with M_(s)≥5.0 occurred in this area from 1970 to 2020,the spatial distribution and seismomagnetic characteristics of lithospheric magnetic field are analyzed.The results show that the overall distribution of the lithosphere magnetic field in Hebei and its surrounding areas is relatively stable.The value of the lithospheric magnetic field in the northern part of Hebei is higher than that in the south,the value of the Yanshan block is higher than that of the North China Plain block,and the value of the lithospheric magnetic field in the area where the fault structure is developed is lower.The epicenters of M_(s)≥5.0 earthquakes are mostly distributed in the low value area and near the zero line of lithospheric magnetic field.
作者
王朝景
李博
刘德强
张海洋
毛丰龙
苏树朋
WANG Zhaojing;LI Bo;LIU Deqiang;ZHANG Haiyang;MAO Fenglong;SU Shupeng(Mobile Survey Team of Hebei Earthquake Agency,Baoding 071000,China)
出处
《华北地震科学》
2022年第4期83-87,94,共6页
North China Earthquake Sciences
基金
河北地震科技星火计划项目(DZ2021121700011,DZ202108090026)。
关键词
河北及周边地区
岩石圈磁场
震磁异常
Hebei and its surrounding areas
lithospheric magnetic field
seismomagnetic characteristics
