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《Seismological Research of Northeast China》 2001-04
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STUDY ON THE PRECURSORY ANOMALOUS CHARACTERISTICS OF GEOMAGNETIC FIELD IN NORTH CHINA

ZHANG Ji-hong,ZHANG Kun (Seimological Bureau of Shandong Province,Shandong Jinan 250014)  
Analysing North Chinas precursory geomagnetic anomalies of moderately strong earthquakes in the last 30 years using of different geomagnetic methods,it is found that the build-up processes of earthquaks have relation to the variation of geomagnetic field.In the area length of 200 kilometers around the epicentre,there are many anomalous variations occurred in some seismostations before a moderately strong earthquake happens, and the anomalous duration is less than a year.The anomalies ies often shows a increasing or decreasing tendency.
【Fund】: 中国地震局“九五”科技攻关项目 ( 95 -0 4-0 4-0 3-0 4)部分成果
【CateGory Index】: P318.5
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