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Analysis on Phase Characteristics of Mining-induced Earthquakes in Huating Mine Aera in Gansu Province

CHEN Ji-feng(Lanzhou Institute of Seismology,CEA,Lanzhou 730000,China)  
Based on the data of Lanzhou digital seismic broadband network,after getting rid of noise and wave filtering by using some data processing techniques,the typical record characteristics of mining-induced earthquakes in Huating mine area,eastern Gansu province,are analysed and interpreted.The result shows that in the records of mining-induced earthquakes,the large period surface wave from close stations is significant and the last time is longger.At Pingliang station,caused by site response amplifing the magnitudes are obviously bigger than other stations.
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