江苏地区介质非弹性衰减和场地响应研究
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摘要
选取江苏数字地震台网在2001年1月—2010年7月记录到43次高质量数字地震波形,采用Atkinson(1992)和Moya(2000)的方法,反演得到江苏地区的介质非弹性衰减特性和场地响应。
In this paper, we inversed the inelastic attenuation of medium and site response in Jiangsu area with the selected high-quality waveform of 43 earthquakes recorded by Jiangsu digital seismic network during January 2001 to June 2010 by the method of Atkinson (1992) and Moya (2000). The results showed that the relation between medium quality factor with frequency in Jiangsu area is Q(f)=320.8 f~(0.5671).At the same time, we also calculated absolute site response of 32 digital seismic stations, the results showed that 1-10 Hz site response changes within the frequency bands from 1. 264 to 7. 184, the average is about 2. 056. A regional change characteristics is also revealed. Loose deposition site response in the middle region was largest, average of about 2. 739 at 1-10 Hz frequency range, indicating that amplification effect for seismic signal. Limestone in northern Jiangsu Province and mixing granite and granite gneiss in the central and western regions, site response in the 1—20 Hz frequency range, and the value of the minimum, the average is about 1. 83. Site response of a small number of stations in 10—20 Hz frequency band is less than 1.
In this paper, we inversed the inelastic attenuation of medium and site response in Jiangsu area with the selected high-quality waveform of 43 earthquakes recorded by Jiangsu digital seismic network during January 2001 to June 2010 by the method of Atkinson (1992) and Moya (2000). The results showed that the relation between medium quality factor with frequency in Jiangsu area is Q(f)=320.8 f~(0.5671).At the same time, we also calculated absolute site response of 32 digital seismic stations, the results showed that 1-10 Hz site response changes within the frequency bands from 1. 264 to 7. 184, the average is about 2. 056. A regional change characteristics is also revealed. Loose deposition site response in the middle region was largest, average of about 2. 739 at 1-10 Hz frequency range, indicating that amplification effect for seismic signal. Limestone in northern Jiangsu Province and mixing granite and granite gneiss in the central and western regions, site response in the 1—20 Hz frequency range, and the value of the minimum, the average is about 1. 83. Site response of a small number of stations in 10—20 Hz frequency band is less than 1.
引文
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刘杰,郑斯华,黄玉龙.利用遗传算法反演非弹性衰减系数、震源参数和场地响应[J].地震学报,2003,25(2) :211-218．
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张国民,马宏生,王辉,等.中国大陆活动地块边界带与强震活动[J].地球物理学报,2005,48(3) :602-610．
张文佑,李阴愧,张弛,等.中国及邻区海陆构造[M].北京:科学出版社,1986:267-278．
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Andrews D J.Objective determination of source parameters and similarity of earthquakes of different size[J].Earthquake Source Mechanics,American Geophysical Union,1986 :259-267．
Atkinson G M,Mereu R F.The shape of ground motion attenuation curves in southeastern Canada [J].BSSA,1992,82(5) :2 014-2 031．
Chael E.Speectral sealing of earthquakes in the Miramichi region of New Brunswick[J].BSSA,1987,77(2) :347-365．
Hartzell S H.Site respond estimation from earthquake data[J].BSSA,1992 ,82 :2 308-2 327．
Moya C A,Aguirre J,Irikura K.Inversion of source parameters and site effects from strong ground motion records using genetic algorithms[J].BSSA,2000,90(4) ,977-992．
Pulli J J.Attenuation of coda waves in New England[J].BSSA,1984,74:1 149-1 166．
Rogers A M,Tinsley J C,Hays W H,et al.Evaluation of the relation between near-surface geological units and ground response in the vicinity of Long Beach,California [J].BSSA,1979 ,69 :1 603-1 622．
Singh S,Herrmann R B.Regionalization of crustal coda Q in the continental United States[J].J Geophys Res,1983,88:527-538．
傅淑房,刘宝诚,李文艺.地震学教程[M].北京:地震出版社,1980．
郭晓,张元生,莘海亮,等.青藏高原东北缘地区非弹性衰减Q值和场地响应的研究[J].地震研究,2008,31(2) :114-118．
胡连英,徐学思,孙寿成,等.溧阳地震与茅东断裂带[M].北京:地震出版社,1997:144-150．
黄才中,葛焕称.中国东部的尾波衰减特征和Q值估计[J].地震学报,1995,1 7(2) :196-202．
黄玉龙,郑斯华,刘杰等.广东地区地震动衰减和场地响应的研究[J].地球物理学报,2003,46(1) :54-61．
江苏省地震局.江苏省数字地震台网工程技术报告[R].2007．
刘杰,郑斯华,黄玉龙.利用遗传算法反演非弹性衰减系数、震源参数和场地响应[J].地震学报,2003,25(2) :211-218．
苏有锦,刘杰,郑斯华,等.云南地区S波非弹性衰减Q值研[J].地震学报,2006,28(2) :206-212．
王俊,吴晶,詹小艳,等.江苏地区及周缘地震精定位与构造意义分析[J].地震地磁观测与研究,2011,32(2) :6-12．
徐嘉伟.郯庐断裂带的平移运动及其地质意义,国际交流地质学术论文集,为21届国际地质大会撰写,第1册构造地质,地质力学[C].北京:地质出版社,1980:129-142．
詹小艳,王俊,缪发军,等.江苏数字地震台网台站震级偏差的分析[J].地震地磁观测与研究,2010,31(2) :41-49．
张国民,马宏生,王辉,等.中国大陆活动地块边界带与强震活动[J].地球物理学报,2005,48(3) :602-610．
张文佑,李阴愧,张弛,等.中国及邻区海陆构造[M].北京:科学出版社,1986:267-278．
郑江蓉,徐桂明,李鸿宇,等.2004年12月26日印尼8． 7级强震后江苏地区同震效应分析[J].防灾减灾工程学报,2005,25(1) :105-113．
Andrews D J.Objective determination of source parameters and similarity of earthquakes of different size[J].Earthquake Source Mechanics,American Geophysical Union,1986 :259-267．
Atkinson G M,Mereu R F.The shape of ground motion attenuation curves in southeastern Canada [J].BSSA,1992,82(5) :2 014-2 031．
Chael E.Speectral sealing of earthquakes in the Miramichi region of New Brunswick[J].BSSA,1987,77(2) :347-365．
Hartzell S H.Site respond estimation from earthquake data[J].BSSA,1992 ,82 :2 308-2 327．
Moya C A,Aguirre J,Irikura K.Inversion of source parameters and site effects from strong ground motion records using genetic algorithms[J].BSSA,2000,90(4) ,977-992．
Pulli J J.Attenuation of coda waves in New England[J].BSSA,1984,74:1 149-1 166．
Rogers A M,Tinsley J C,Hays W H,et al.Evaluation of the relation between near-surface geological units and ground response in the vicinity of Long Beach,California [J].BSSA,1979 ,69 :1 603-1 622．
Singh S,Herrmann R B.Regionalization of crustal coda Q in the continental United States[J].J Geophys Res,1983,88:527-538．
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