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《Seismological Research of Northeast China》 2009-01
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DISCUSSION ABOUT THE VARIATION OF EARTH RESISTIVITY AND THE EARTHQUAKE ABOVE FOUR MAGNITUDE IN HEILONGJIANG PROVINCE

CHEN Xiao-Ying,GAO Feng(Seismological Bureau of Heilongjiang Province,Harbin 150090)  
Suihua earth resistivity observation has already been set up for 22 years.We compared ten years data(1992 to 2001) with the above 4 magnitude earthquakes which focus in Jiayin of Hei longjang province(northe latitude: 47°30′-49°00′;east longitude: 128°30′-131°00′).The M4 earthquakes happened 11 times,and happened in group.We found stepped variation,in the monthly mean values of earth resistivity(N45°W) before the earthquakes,And after earthquakes they had the same shape variation.
【CateGory Index】: P315.722
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