近场强地震动预测中浅源地震的Asperity模型特征
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摘要
选择了29个浅源地震的滑动分布,用来研究近场强地震动预测中浅源地震的凹凸体模型特征.将凹凸体分成三种类型研究:所有凹凸体,最大凹凸体和其它凹凸体.根据凹凸体的数量将凹凸体模型分为三种模型:所有凹凸体,单凹凸体和多凹凸体.每种模型中,根据断层类型将断层分成三类:所有断层,倾滑断层和走滑断层.用最小二乘法建立了三种凹凸体模型中不同断层类型的凹凸体各参数与矩震级和相应断层参数之间的关系式.同时也建立了不同断层类型的地震破裂初始点位置参数与矩震级之间的关系式.系统地描述了近场强地震动预测中浅源地震的凹凸体模型特征.
The slip distributions of 29 shallow earthquakes were selected to characterize a shallow earthquake asperity model for predicting near field strong ground motion.Asperity was classified into three types: all-asperity,the maximum asperity,and other-asperity.Based on the number of asperities on the fault plane,the asperity model was classified into three models: all-asperity,single-asperity and multi-asperity models.In each model,fault was classified into three types: all-fault,dip-slip fault and strike-slip fault.Relationships between asperity parameters and moment magnitude and relationships between asperity parameters and corresponding fault parameters for various fault types in three asperity models were derived.The relationships between parameters of the rupture starting point in the seismic source and moment magnitude for three fault types were also derived.A shallow earthquake asperity model for predicting near field strong ground motions was systematically characterized.
The slip distributions of 29 shallow earthquakes were selected to characterize a shallow earthquake asperity model for predicting near field strong ground motion.Asperity was classified into three types: all-asperity,the maximum asperity,and other-asperity.Based on the number of asperities on the fault plane,the asperity model was classified into three models: all-asperity,single-asperity and multi-asperity models.In each model,fault was classified into three types: all-fault,dip-slip fault and strike-slip fault.Relationships between asperity parameters and moment magnitude and relationships between asperity parameters and corresponding fault parameters for various fault types in three asperity models were derived.The relationships between parameters of the rupture starting point in the seismic source and moment magnitude for three fault types were also derived.A shallow earthquake asperity model for predicting near field strong ground motions was systematically characterized.
引文
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[21]HERMANDEZ B,SHAPIRO N M,SINGH S K,et al.Rupture H istory of September 30,1999 Intrap lateEarthquake ofOaxaca,M exico(Mw=7.5)from Inver-sion of Strong-Motion Data[J].Geophys Res Lett,2001,28:363-366.
[22]WALD D J,SOMERVILLE P G.Variab le slip rupturemodel of the great 1923 Kanto,Japan earthquake:geo-detic and body waveform analysis[J].Bu ll Se ism SocAm,1995,85:159-177.
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[24]WALD D J,HELMBERGER D V,HEATON T H.Rupture model of the 1989 Lom a Prieta earthquake fromthe inversion of strong motion and broadband telese is-m ic data[J].Bu ll Se ism Soc Am,1991,81:1540-1572.
[2]IR IKURA K,M IYAKE H.Pred iction of strong groundmotions for scenario earthquakes[J].J geography,2001,110(6):849-875.
[3]M IYAKE H,IWATA T,IR IKURA K.Estim ation of rup-ture propagation d irection and strong motin generation ar-ea from azimuth and d istance dependence of source am-p litude spectra[J].Geophys Res Lett,2001,28(14):2727-2730.
[4]TAKEO M,M IKAM I N.Fau lt heterogene ity of in landearthquake in Japan[J].Bu ll Earthquake Res InstUn ivTokyo,1990,65:541-569.
[5]LIU H L,HELMBERGER D V.The near-sourceground motion of the 6 August 1979 Coyote Lake,Cali-forn ia earthquake[J].Bu ll Se ism Soc Am,1983,73:201-218.
[6]HARTZELL S H,HEATON T H.Inversion of strongground motion and telese ism ic waveform data for the fau ltrupture h istory of the 1979 Imperial Valley,Californ ia,earthquake[J].Bu ll Se ism Soc Am,1983,73:1553-1583.
[7]HARTZELL S H,HEATON T H.Rupture h istory of the1984 Morgan H ill,Californ ia,earthquake from the inver-sion of strong motion records[J].Bu ll Se ism Soc Am,1986,76:649-674.
[8]WALD D J,HELMBERGER D V,HARTZELL S H.Rupture process of the 1987 Superstition H ills earthquakefrom the inversion of strong motion data[J].Bu ll Se ismSoc Am,1990,80:1079-1098.
[9]WALD D J,HEATON T H.Spatial and temporal d istri-bution of slip of 1992 Landers,Californ ia earthquake[J].Bu ll Se ism Soc Am,1994,84:668-691.
[10]YOSH IDA S,KOKETSU K,KATO T,et al.Joint in-version of near-and far-field waveform s and geodeticdata for the rupture process of the 1995 Kobe earthquake[J].J Phys Earth,1996,44:437-454.
[11]IDE S.Source process of the 1997 Yam aguch i,Japan,earthquake analyzed in d ifferent frequency bands[J].Geophysical Research Letters,1999,26:1973-1976.
[12]Antolik,M icheal,Kaverina,et al.Compound ruptureof the great 1998 Antarctic p late earthquake[J].J Geo-phys Res,2000,105(10):23825-23838.
[13]JI C,WALD D J,HELMBERGER D V.Slip h istory of1999 Hector M ine,Californ ia earthquake[J].Se ismRes Lett,2000,71:224.
[14]HARTZELL S H,MENDOZA C.App lication of an iter-ative least-squares waveform inversion of strong motionand telese ism ic records to the 1978 Tabas,Iran,earth-quake[J].Bu ll Se ism Soc Am,1991,81:305-331.
[15]MENDOZA C.Cose ism ic slip of two large M exicanearthquakes from telese ism ic body waveform s:Imp lica-tions for asperity interaction in the M ichoacan p late-boundary segm ent[J].J Geophys Res,1993,98:8197-8210.
[16]MEBDOZA C,HARTZELL S H.Inversion for slip d is-tribution using GDSN p wave:North Palm Springs,Bo-rah Peak,and M ichocan earthquake[J].Bu ll Se ismSoc Am,1988,78:1092-1111.
[17]HARTZELL S H,LANGER C,MENDOZA C.Ruptureh istories of eastern North Am erican earthquake[J].Bu ll Se ism Soc Am,1994,84:1703-1724.
[18]WALD D J,HEATON T H,KUDNUT K W.The sliph istory of the 1994 Northridge,Californ ia earthquakedeterm ined from strong motion,telese ism ic,GPS,andleveling data[J].Bu ll Se ism Soc Am,1996,86:S49-S70.
[19]MENDOZA C,HARTZELL S.Fau lt-slip d istributionof the 1995 Colim a-Jalisco,M exico,earthquake[J].Bu ll Se is Soc Am,1999,89(5):1338-1344.
[20]YAG I Y,K IKUCH I M,YOSH IDA S,et al.Compari-son of the cose ism ic rupture w ith the aftershock d istribu-tion in the Hyuga-nada earthquakes of 1996[J].Geo-phys Res Lett,1999,26:3161-3164.
[21]HERMANDEZ B,SHAPIRO N M,SINGH S K,et al.Rupture H istory of September 30,1999 Intrap lateEarthquake ofOaxaca,M exico(Mw=7.5)from Inver-sion of Strong-Motion Data[J].Geophys Res Lett,2001,28:363-366.
[22]WALD D J,SOMERVILLE P G.Variab le slip rupturemodel of the great 1923 Kanto,Japan earthquake:geo-detic and body waveform analysis[J].Bu ll Se ism SocAm,1995,85:159-177.
[23]HARTZELL S H.Comparison of se ism ic waveform in-version techn iques for the rupture h istory of a fin itefau lt:app lication to the 1989 North Palm Springs,Cali-forn ia,earthquake[J].J Geophys Res,1989,94:7515-7534.
[24]WALD D J,HELMBERGER D V,HEATON T H.Rupture model of the 1989 Lom a Prieta earthquake fromthe inversion of strong motion and broadband telese is-m ic data[J].Bu ll Se ism Soc Am,1991,81:1540-1572.
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