华北地震区岩石圈磁异常场零值线与中强震震中分布关系  

Relationship between Zero-value-line of Abnormal Geomagnetic Field in Lithosphere and Strong-moderate Earthquake Epicenters in North China Seismic Region

作　　者：顾春雷[1,2] 张毅[2] 顾左文[3] 王行舟[2] 王雷[2] 徐如刚[2] 朱志春[2] 

机构地区：[1]中国科学技术大学地球与空间科学系,安徽合肥230026 [2]安徽省地震局,安徽合肥230031 [3]中国地震局地球物理研究所,北京100081

出　　处：《西北地震学报》2012年第2期174-179,共6页Northwestern Seismological Journal

基　　金：地震行业科研专项200908029-03-02

摘　　要：通过对华北地震区岩石圈磁异常场各分量的零值线分布以30km为缓冲半径建立缓冲区,并对缓冲区内1900年以来MS4.0及以上大陆地震进行统计,探讨华北地区岩石圈磁异常场零值线分布与中强震震中位置关系,发现7.0级以上地震震中分布与岩石圈磁异常场磁偏角、N向分量、E向分量以及垂直分量零值线的分布位置关系密切,其中震中分布与磁偏角的相关性最高,达83.3%。We build the buffer zones with a 30 km radius from the zero-value-lines of all nents of the abnormal geomagnetic field in lithosphere of north China seismic region, and statst cal analyze all the Ms≥4.0 earthquakes in the buffer zones since 1900. The results indicate that there are close relativities among the epicenter distribution of large earthquakes with Ms≥7.0 and the zero-value-lines of geomagnetic declination, north component, east component and vertical component of the abnormal geomagnetic field, and the epicenter distribution has the highest relation to the geomagnetic declination with proportion 83.3%.

关 键 词：岩石圈磁异常 零值线 缓冲区 中强震震中 华北地震区 

分 类 号：P315.721[天文地球—地震学]