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《NORTHWESTERN SEISMOLOGICAL JOURNAL》 1995-03
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THE HIERARCHY OF PRECURSORY FLUCTUATION INTENSIFICATION OF THE GONGHE EARTHQUAKE AND PREDICTION BY FOLLOWING THE TRACKS OF STRONG EARTHQUAKE

QinBaoyan and Li Zuotang(Earthquake Research Institute of Lanzhou, SSB, Lanzhou 730000)  
Based on the universal law of precursory fluctuation intensification before strong earth-quakes,this paper takes the l990 Gonghe strong earthquake as an example to study multi-hi-erarchy of the precursory fluctuation intensification of the small earthquake frequency,themodulation ratio of small earthquakes,radon in groundwater and hydraulic discharge in springbefore the earthquake. According to the phenomenon authors considered that the multi-hierar-chy of the precursory fluctuation intensification is an important path for prediction by followingthe tracks of a strong earthquake.
【CateGory Index】: P315.7
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