地磁内、外源场分离及其强震前内、外源电流体系的演化特征  

SEPARATION OF INTERIOR AND EXTERIOR OF GEOMAGNETIC FIELD AND EVOLUTION CHARACTERISTICS OF INTERIOR AND EXTERIOR CURRENT SYSTEM BEFORE STRONG EARTHQUAKE

作　　者：张建国[1] 刘晓灿[2] 唐庭梅[3] 马新欣[2] 袁亚红[2] 

机构地区：[1]河北省地震局邯郸中心台,邯郸056006 [2]中国地震局地球物理研究所,北京100081 [3]山东省地震局,济南250014

出　　处：《大地测量与地球动力学》2009年第5期47-50,共4页Journal of Geodesy and Geodynamics

基　　金：国家科技支撑课题(2008BAC35B01);中央级公益性科研院所基本科研业务专项(058904)

摘　　要：利用地磁内外源场分离方法,反演1997年11月8日玛尼地震前地下和空间等效电流体系的演化图像,分析了地磁低点位移出现前后等效电流体系变化特征。结果表明:内、外场等效电流体系的变化与地震"低点位移"异常现象有着内在的联系,等效电流体系变化可能是地磁低点位移异常现象产生的原因之一。By use of the separation of the interior and exterior geomagnetic fields the equivalent current systems of interior and exterior geomagnetic field are inversed.The relations between the geomagnetic ＂lowest shift＂ phenomenon and the equivalent current systems are studied.The results show there is clear relation between them,so,the change of equivalent current systems may be one of causes of the geomagnetic ＂lowest shift＂.

关 键 词：地磁内外源场分离 地磁低点位移 Sq等效电流体系 演化图像 地震预测 

分 类 号：P315.721[天文地球—地震学]