数字化遥测台网与模拟台网记录的地震波形特征比较
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摘要
为对数字化遥测地震台网记录波形的特征有一准确的认识,对山东、山西数字化遥测地震台网与模拟台网的地震波形特征进行了比较。对同一台址的最大地动位移、振幅比以及波形的初动在清晰程度上作了比较,并对前者作了量化分析。初步结果显示,有91%的地震地动位移差在50%以内,地动位移符合程度较高,有93%的振幅比差在±0.5以内,即震级偏差落在±0.5级以内,波形特征很接近;对同一台址的同一地震,数字记录的地震波形较模拟记录的地震波形在高频段更清晰。
The comparison of the waveform features from the digital seismic networks with the analog data in Shandong and Shanxi is made.Throug the comparison and the quantized analysis for the maximum earth motion displacements,amplitude ratios and first motion clarity of the waveforms at same station are made.The primary results show that the consonat degree of the earth motion displacements was more high which the errors of the earth motion displacements of 91 % were below 50 %,the waveform features were similar which the errors of the amplitude ratios of 93 % were within ±05,i.e. the errors of the magnitudes were wtitin ±05 grade.The high frequency parts of the seismic waveforms from the digital records of same earthquake at same station were more clear than the analog records.
The comparison of the waveform features from the digital seismic networks with the analog data in Shandong and Shanxi is made.Throug the comparison and the quantized analysis for the maximum earth motion displacements,amplitude ratios and first motion clarity of the waveforms at same station are made.The primary results show that the consonat degree of the earth motion displacements was more high which the errors of the earth motion displacements of 91 % were below 50 %,the waveform features were similar which the errors of the amplitude ratios of 93 % were within ±05,i.e. the errors of the magnitudes were wtitin ±05 grade.The high frequency parts of the seismic waveforms from the digital records of same earthquake at same station were more clear than the analog records.
引文
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