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《Northwestern Seismological Journal》 2003-03
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USING METHOD OF ENERGY LINEARITY IN WAVELET TRANSFORM TO DISTINGUISH EXPLOSION OR COLLAPSE FROM NATURE EARTHQUAKE

LIU Xiqiang1, SHEN Ping2, ZHANG Ling1, LI Yonghong1(1.Seismological Bureau of Shandong Province,Jinan250014,China;2.Institute of Geophysics,CSB,Beijing100081)  
In order to extract the difference information from the recorded waveforms of natureral earthquake and explosion or collapse in seismic focus depth, seismic focus scale ,seismic focus break mechanism , seismic wave travel path and seismic wave attenuation,the energy linearity characteristics of wavelet multiresolution from the records of some nature earthquakes,explosions and collapses in Digital Seismic Network of Shangdong prov.are analysed,and a new method of energy linearity in wavelet transform is put forward to distinguish explosion or collapse from nature earthquake.The result indicates that in energy linearity of fine structure wavelet decomposition signal,the range of nature earthquake is from -2.0 to 1.0,but the range of explosion or collapse is from 2.0 to 3.4;in wavelet decomposition scale corresponding to maximum energy of fine structure wavelet decomposition signal,the range of nature earthquake is from 1 to 2 and the frequency is from 6.25 to 25 Hz respectively,but the range of explosion or collapse is from 4 to 5 and the frequence is from 0.7 to 3.1 Hz.
【Fund】: 地震科学联合基金(102035);; "十五"国家科技攻关项目(2001BA601B02-02-03-06);; 济南市科技计划专项课题资助
【CateGory Index】: P315
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