地震频发区域背景噪声提取格林函数的反褶积方法研究
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摘要
针对云南这一地震频发区域记录到的地震背景噪声数据,设计了一种"最大值均一化"算法,该算法能有效地消除背景噪声中的地震信号、畸变信号及其它干扰信号。应用此算法对记录到的背景噪声数据进行预处理,对处理后的数据利用多窗谱反褶积计算方法可获得其具有较高信噪比和保留了相对幅值信息的格林函数。
We design the maximum normalization algorithm which can effectively eliminate seismic signals,distorted signals and other interfering signals from the ambient-noise recorded in a frequent earthquake region such as Yunnan.First,we apply this algorithm to pre-processing the recorded ambient noise,and then adopt the multi-taper deconvolution method for the processed data to extract Green's function with high signal-to-noise ratio and relative amplitude information.
We design the maximum normalization algorithm which can effectively eliminate seismic signals,distorted signals and other interfering signals from the ambient-noise recorded in a frequent earthquake region such as Yunnan.First,we apply this algorithm to pre-processing the recorded ambient noise,and then adopt the multi-taper deconvolution method for the processed data to extract Green's function with high signal-to-noise ratio and relative amplitude information.
引文
房立华,吴建平.2009.背景噪声频散曲线测定及其在华北地区的应用[J].地震学报,31(5):544-554.
胡聿贤.1999.工程场地地震安全性评价技术教程[M].北京:地震出版社.
李军,金星,周峥嵘,等.2009.利用地震噪声准实时监测短周期面波波速变化[J].地震学报,31(6):629-640.
刘志坤,黄金莉.2010.利用背景噪声互相关研究汶川地震震源区地震波速变化[J].地球物理学报,53(4):853-863.
郑定昌,庞卫东,闵照旭,等.2011.云南地区背景噪声特征分析[J].地震研究,34(2):201-206.
Aki K.1957.Space and time spectra of stationary stochastic waves,with special reference to microtremors[J].Bull Earthquake Res Inst UnivTokyo,35(3):415-457.
Bensen G D,Ritzwoller M H,Barmin M P,et al.2007.Processing seismi-cambient noise data to obtain reliable broad-band surface wave dis-persion measurements[J].Geophys J Int,169(3):1239-1260.
Brenguier F,Shapiro N M,Campillo M,et al.2007.3-D surface wave tomography of the Piton de la Fournaise volcano using seismic noisecorrelations[J].Geophys Res Lett,34(2):L02305.doi:10.1029/2006GL028586.
Campillo M,Paul A.2003.Long-range correlations in the diffuse seismiccoda[J].Science,299(5606):547-549.
Claerbout J F.1968.Synthesis of a layered medium from its acoustictransmission response[J].Geophysics,33(2):264-269.
Vasconcelos I,Snieder R.2008a.Interferometry by deconvolution:Part1—Theory for acoustic waves and numerical examples[J].Geophys-ics,73(3):S115-S128.dol:10.1190/1.2904554.
Vasconcelos I,Snieder R.2008b.Interferometry by deconvolution:Part2—Theory for elastic waves and application to drill-bit seismic ima-ging[J].Geophysics,73(3):S129-S141,doi:10.1190/1.2904985.
Kohler M D,Heaton T H,Bradford S C.2007.Propagating waves in thesteel,moment-frame factor building recorded during earthquakes[J].BSSA97(4):1334-1345.
Larose E,Roux P,Campillo M.2007.Reconstruction of Rayleigh-Lambdispersion spectrum based on noise obtained from an air-jet forcing[J].J Acoust Soc Am,122(6):3437-3444.
Lin F C,Ritzwoller M P,Shen W.2011.On the reliability of attenuation measurements from ambient noise cross-correlations[J].GeophysRes Letts,38,L11303.doi:10.1029/2011GL047366.
Park J,Lindberg C R,Vernon III F L.1987.Multitaper spectral analysisof high-frequency seismograms[J].J Geophys Res,92B(12):675-12684.
Prieto G A,G C Beroza.2008.Earthquake ground motion prediction usingthe ambient seismic field[J].Geophys Res Lett,35,L14304.doi:10.1029/2008GL034428.
Prieto G A,Lawrence J F,Beroza G C.2009.Anelastic Earth structurefrom the coherency of the ambient seismic field[J].JGR,114,B07303.doi:10.1029/2008JB006067.
Rickett J,Claerbout J F.1999.Acoustic daylight imaging via spectral fac-torization:Helioseismology and reservoir monitoring[J].LeadingEdge,18:957-960.
Sabra K G,Gerstoft P,Roux P,et al.2005.Surface wave tomography frommicroseisms in southern California[J].Geophys Res Lett,32,L14311.doi:10.1029/2005GL023155.
Sabra K G,Roux P,Gerstoft P,et al.2006.Extracting coherent coda arri-vals from cross-correlations of long period seismic waves during theMount St.Helens2004eruption[J].Geophys Res Lett,33,L06313.doi:10.1029/2005GL025563.
Shapiro N,Campillo M,Stehly L,et al.2005.Highresolution surface wavetomography from ambient seismic noise[J].Science,307:1615-1618.
Snieder R,Safak E.2006.Extracting the building response using seismic interferometry:Theory and application to the Millikan Library in Pas-adena,California[J].BSSA,96(2):586-598.
Thomson D J.1982.Spectrum estimation and harmonic analysis[J].IEEEProc,70(9):1055-1096.
Weaver R L,Lobkis O I.2006.Diffuse fields in ultrasonics and seismology[J].Geophysics,71(4):S15-S19.
Yao H,van der Hilst R D,de Hoop M V.2006.Surface-wave arraytomography in SE Tibet from ambient seismic noise and two-stationanalysis—I.Phase velocity maps[J].Geophys J Int,166(2):732-744.
胡聿贤.1999.工程场地地震安全性评价技术教程[M].北京:地震出版社.
李军,金星,周峥嵘,等.2009.利用地震噪声准实时监测短周期面波波速变化[J].地震学报,31(6):629-640.
刘志坤,黄金莉.2010.利用背景噪声互相关研究汶川地震震源区地震波速变化[J].地球物理学报,53(4):853-863.
郑定昌,庞卫东,闵照旭,等.2011.云南地区背景噪声特征分析[J].地震研究,34(2):201-206.
Aki K.1957.Space and time spectra of stationary stochastic waves,with special reference to microtremors[J].Bull Earthquake Res Inst UnivTokyo,35(3):415-457.
Bensen G D,Ritzwoller M H,Barmin M P,et al.2007.Processing seismi-cambient noise data to obtain reliable broad-band surface wave dis-persion measurements[J].Geophys J Int,169(3):1239-1260.
Brenguier F,Shapiro N M,Campillo M,et al.2007.3-D surface wave tomography of the Piton de la Fournaise volcano using seismic noisecorrelations[J].Geophys Res Lett,34(2):L02305.doi:10.1029/2006GL028586.
Campillo M,Paul A.2003.Long-range correlations in the diffuse seismiccoda[J].Science,299(5606):547-549.
Claerbout J F.1968.Synthesis of a layered medium from its acoustictransmission response[J].Geophysics,33(2):264-269.
Vasconcelos I,Snieder R.2008a.Interferometry by deconvolution:Part1—Theory for acoustic waves and numerical examples[J].Geophys-ics,73(3):S115-S128.dol:10.1190/1.2904554.
Vasconcelos I,Snieder R.2008b.Interferometry by deconvolution:Part2—Theory for elastic waves and application to drill-bit seismic ima-ging[J].Geophysics,73(3):S129-S141,doi:10.1190/1.2904985.
Kohler M D,Heaton T H,Bradford S C.2007.Propagating waves in thesteel,moment-frame factor building recorded during earthquakes[J].BSSA97(4):1334-1345.
Larose E,Roux P,Campillo M.2007.Reconstruction of Rayleigh-Lambdispersion spectrum based on noise obtained from an air-jet forcing[J].J Acoust Soc Am,122(6):3437-3444.
Lin F C,Ritzwoller M P,Shen W.2011.On the reliability of attenuation measurements from ambient noise cross-correlations[J].GeophysRes Letts,38,L11303.doi:10.1029/2011GL047366.
Park J,Lindberg C R,Vernon III F L.1987.Multitaper spectral analysisof high-frequency seismograms[J].J Geophys Res,92B(12):675-12684.
Prieto G A,G C Beroza.2008.Earthquake ground motion prediction usingthe ambient seismic field[J].Geophys Res Lett,35,L14304.doi:10.1029/2008GL034428.
Prieto G A,Lawrence J F,Beroza G C.2009.Anelastic Earth structurefrom the coherency of the ambient seismic field[J].JGR,114,B07303.doi:10.1029/2008JB006067.
Rickett J,Claerbout J F.1999.Acoustic daylight imaging via spectral fac-torization:Helioseismology and reservoir monitoring[J].LeadingEdge,18:957-960.
Sabra K G,Gerstoft P,Roux P,et al.2005.Surface wave tomography frommicroseisms in southern California[J].Geophys Res Lett,32,L14311.doi:10.1029/2005GL023155.
Sabra K G,Roux P,Gerstoft P,et al.2006.Extracting coherent coda arri-vals from cross-correlations of long period seismic waves during theMount St.Helens2004eruption[J].Geophys Res Lett,33,L06313.doi:10.1029/2005GL025563.
Shapiro N,Campillo M,Stehly L,et al.2005.Highresolution surface wavetomography from ambient seismic noise[J].Science,307:1615-1618.
Snieder R,Safak E.2006.Extracting the building response using seismic interferometry:Theory and application to the Millikan Library in Pas-adena,California[J].BSSA,96(2):586-598.
Thomson D J.1982.Spectrum estimation and harmonic analysis[J].IEEEProc,70(9):1055-1096.
Weaver R L,Lobkis O I.2006.Diffuse fields in ultrasonics and seismology[J].Geophysics,71(4):S15-S19.
Yao H,van der Hilst R D,de Hoop M V.2006.Surface-wave arraytomography in SE Tibet from ambient seismic noise and two-stationanalysis—I.Phase velocity maps[J].Geophys J Int,166(2):732-744.
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