南北地震带历史地震与岩石圈磁场空间分布特征分析
Analysis of historical earthquakes in north-south seismic belt and characteristics of spatial distribution of lithospheric magnetic field
赵慧琴1
作者信息
- 1. 中国河北 071000 保定地震监测中心站
- 折叠
摘要
利用 2016-2020 年南北地震带流动地磁矢量观测资料,结合 2017 年 6 月 1 日至 2021 年 7 月 1 日发生在测区范围内MS≥5.0 地震,对该地区 2015.0 年代岩石圈磁场空间分布与地震的特征进行分析和归纳.结果表明,南北地震带地区大部分MS≥5.0 地震在岩石圈磁场中表现出较明确的位置特征,尤其是"0"值线附近、水平矢量H幅值弱化这 2 个位置,是南北地震带地区中强及以上地震的易发部位.高梯度带和水平矢量H方向转向这些位置亦需格外关注.
Abstract
Using the mobile geomagnetic vector observation data of the north-south seismic belt from the year of 2016 to 2020,combined with the MS≥5.0 earthquake that occurred in the survey area from June 1,2017 to July 1,2021,the spatial distribution of the lithospheric magnetic field and the characteristics of earthquakes in the 2015.0 era in the region were analyzed and summarized.The results indicate that most earthquakes with MS≥5.0 in the north-south seismic belt region exhibit clear positional characteristics in the lithospheric magnetic field,especially near the"0"value line and the weakening of the horizontal vector H amplitude,which are prone to moderate to strong earthquakes in the north-south seismic belt region.Special attention should also be paid to the high gradient zone and the horizontal vector turning towards these positions in the H direction.
关键词
南北地震带/流动地磁/岩石圈磁场/水平矢量H/异常特征Key words
north-south seismic zone/mobile geomagnetism/lithosphere magnetic field/horizontal vector H/abnormal features引用本文复制引用
基金项目
河北省地震科技星火计划(DZ2021121500001)
出版年
2024
国家科技期刊平台
NSTL
万方数据