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《Plateau Earthquake Research》 1993-02
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COMPREHENSIVE OBSERVATION ON ELECTROMAGNETIC MULTIPARAMETERS AND EARTHQUAKE PREDICTION IN QILIAN AREA

Chen Youfa;Su Mingda;Zhang Yongli;Zhao Jialiu;Lu Yangquan Earthquake Research Institute of Lanzhou,SSB,China  
In this paper,the comprehensive observation data of electromagnetic multiparameters first made by our coutry are studied,the main results show that: (1)the electromagnetic multiparameters data are rich,and its valuable quantity of informations are plentiful; (2)The range of electromagnetic precursor anomaly before M_s≥5.0 earthquakes is 290km around the observation area; (3)The time Of electromagnetic precursor from the crust is earlier 6---14 times than that from the sky.
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