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《Progress in Geophysics》 2013-02
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The low frequency events category and characteristics analysis

DENG Jin1,2,LIU Kun1,LI Shao-hua1(1.Earthquake Administration of Gansu Province(Key Laboratory of Loess Earthquake Engineering,CEA), Lanzhou 730000,China;2.Lanzhou Institute of Seismology,CEA,Lanzhou 730000,China; 3.Geotechnical Disaster Prevention Engineering Technology Research Center of Gansu Province,Lanzhou 730000,China; 4.Institute of Geophysics Post Doctoral station,CEA,Beijing 100081,china)  
Through the analysis of all kinds of low frequency earthquake of global record,the main types such as: ETS(Epidemic tremor and slip event),LFT(low frequency tremor),SSE(slow slip event),VLF(very low frequency event),DLF(deep low-frequency event),it introduced the main low frequency events and natural seismic waveform and spectrum characteristics.The analysis shows that in different countries recorded by the events of ETS,LFT,SSE,each kind of events has similar period range.By the low frequency events classification,we obtained frequency-duration classification diagrammatic map.The main low frequency events recorded in the map indicate that,the volcanic earthquakes,natural earthquake,typhoon and tremor,each has its certain range of frequencies and duration.It can distinguish from the diagrammatic map the vibration event attributes and the characteristics identification of low frequency events.Through the frequency range of low frequency information and waveform features analysis and confirmation,it can provide valuable earthquake precursor information.
【Fund】: 公益性行业科研专项(201008006-4);; 中国地震局地震预测研究所基本科研业务费项目(2010A88-6)资助
【CateGory Index】: P315
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