摘要
应用高精度、高密度地面磁测资料,计算获取研究区域F要素高空间分辨率岩石圈磁场数值模型,主要研究模型空间分布特征、与地震地质构造的相关性、历史地震震中在模型中的分布规律与位置特征。研究发现,研究区模型空间结构复杂,局部异常特征表现强烈,总体具有与地形、地层关系密切的分区特征;强磁异常区走向与断裂构造体系总体一致;5级以上历史地震多发生于模型低幅值区、负值区、"0"值线、高梯级带等特殊位置。
The high spatial resolution lithospheric magnetic field numerical model(ΔF) of F elements in the study area is calculated by using the high-precision and high-density ground-based magnetic survey data, and then it is analyzed comprehensively. The main contents include: the spatial distribution characteristics of the model, the correlation with the seismogeological structure, the distribution law and location characteristics of the historical epicenter in ΔF. It is found that the spatial structure of ΔF in the study area is complex, and the local anomaly features are strong, which are closely related to the topography and strata as a whole;the strike of the strong magnetic anomaly area is generally consistent with the fault structural system;the historical earthquakes with m≥5 occur in the low amplitude area, negative value area, "0" value line, high gradient belt and other special locations.
作者
苏树朋
李博
张海洋
王朝景
刘德强
Su Shupeng;Li Bo;Zhang Haiyang;Wang Zhaojing;Liu Deqiang(Mobile Survey Team of Earthquake Administration of Hebei Province,Baoding 071000,Hebei,China)
出处
《震灾防御技术》
CSCD
北大核心
2020年第2期463-471,共9页
Technology for Earthquake Disaster Prevention
基金
河北地震科技星火计划项目(DZ20190422046)资助。
关键词
地磁场总强度
岩石圈磁场
高空间分辨率
地震地质
地震
Geomagnetic total intensity
Lithospheric magnetic field
High spatial resolution
Seismic geology
Earthquake
