胶东半岛及两侧海域尾波Q值分析
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摘要
根据单次散射(Aki)模型,利用2003年至今山东台网记录的26次2.9级以上地震的数字化地震波,研究并探讨了胶东半岛及两侧海域平均尾波Q值,在1~18Hz的频率域范围内,Q值与频率的依赖关系为:胶东北部海域QC=(313±42)f(0.653±0.145),胶东内陆QC=(319±88)f(0.649±0.145),黄海海域QC=(259±60)f(0.757±0.277),与国内其他区域尾波Q值研究结果相比,本区域QC为高值、对频率低依赖性区域。可能与本研究区内构造活动弱、地震活动水平低有关。
Based on the single scatter model (Aki), using 26 earthquake digital wave data above ML≥2.9 from 2003 to now recorded by Shandong earthquake net, the average Q value of coda in relative region is calculated and relationship between Q value and frequency is discussed. The results are:QC=(313±42)f(0.653±0.145) in sea areas upstate Jiaodong Peninsula;QC=(319±88)f(0.649±0.145) in Jiaodong inland;QC=(259±60)f(0.757±0.277) in Huanghai areas. Contrasting the result with that of other domestic region, the coda scatter feature is that the Q value is higher but dependence on frequency is lower, so it is considered that tectonic activity and seismic activity are low in this region.
Based on the single scatter model (Aki), using 26 earthquake digital wave data above ML≥2.9 from 2003 to now recorded by Shandong earthquake net, the average Q value of coda in relative region is calculated and relationship between Q value and frequency is discussed. The results are:QC=(313±42)f(0.653±0.145) in sea areas upstate Jiaodong Peninsula;QC=(319±88)f(0.649±0.145) in Jiaodong inland;QC=(259±60)f(0.757±0.277) in Huanghai areas. Contrasting the result with that of other domestic region, the coda scatter feature is that the Q value is higher but dependence on frequency is lower, so it is considered that tectonic activity and seismic activity are low in this region.
引文
陈俊华,甘家思.2006.九江-瑞昌5.7级地震余震尾波QC值分析[J].大地测量与地球动力学,26(3):65~68
黄玉龙,郑斯华,刘杰等.2003.广东地区地震动衰减和场地响应的研究[J].地球物理学报,46(1):54~61
李白基,秦嘉政,钱晓东等.2004.云南姚安地区尾波衰减[J].地震学报,26(1):47~52
李松林,樊计昌,惠乃玲等.1990.滦县地区尾波Q值及其与频率关系的研究[J].地震学报,12(4):357~366
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吕坚,朱新运,高建华等.2006.九江-瑞昌地区尾波衰减特征初探[J].地震,26(4):15~21
王彩勤,郑斯华,刁桂苓等.2004.张北地震序列的尾波Q值研究[J].防震减灾工程学报,24(1):37~40
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赵卫明,杨明芝,金延龙.2000.宁夏中北部地区尾波Q值研究[J].地震学报,22(3):249~256
周翠英,王铮铮等.2005.换动地区现代地壳应力场及地震断层错动性质[J].地震地质,27(2):273~288
朱新运,刘杰,张帆等.2006.基于Aki模型的近震S波尾波Q值求解及分析软件研制[J].地震研究,29(1):76~80
Aki K.1969.Analysis of seismic coda of local earthquakes as scattered wave[J].J Geophys Res,74,615~631
Aki K,Chouet B.1975.Origin of coda waves:source,attenuation and scattering effects[J].J Geophys Ras,80,3322~3342
Aki K.1980.Scattering and attenuation of shear waves in the lithosphere[J].J Geophys Res,85,6496~6504
Gupta S C,Teotia,Rai S S,Gautam N.1998.CodaQesti matesinthe Koyna region,India[J].Pure Appl Geophys,153,713~731,of Baja California,Geol Soc Am Memoir,140,170
Hoshiba M.1991.Si mulation of multiole scattered coda waves excitation base on the enery conservation law[J].Phys EarthPlanet Interiors,67,123~136
Jin A,Aki K.1980.Spatial andtemporal correlation betweenQandscismicity andits physical mechanism[J].J Geophys Res,94,14041~14059
Mandal P and Rastogi B K.1998.Afrequency-dependent relation of cidaQCfor Koyna-Warma region,India[J].Pure ApplGeophys,153,163~177
Margerin L,Campillo M.and Tiggelen B van.1998.Radiative transfer and diffusion of waves in a layered medium:newin-sight into codaQ[J].Geophys J Int,134,247~258
Pulli J.1984.Attenuation of coda wave in New England[J].Bull Seis Soc Amer,1149~1166
Singh S,Herrmann R B.1983.Regionalization of crustal codaQin thecontinental United States[J].J Grcphys Res,88,527~538
黄玉龙,郑斯华,刘杰等.2003.广东地区地震动衰减和场地响应的研究[J].地球物理学报,46(1):54~61
李白基,秦嘉政,钱晓东等.2004.云南姚安地区尾波衰减[J].地震学报,26(1):47~52
李松林,樊计昌,惠乃玲等.1990.滦县地区尾波Q值及其与频率关系的研究[J].地震学报,12(4):357~366
刘杰,郑斯华,黄玉龙.2003.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,25(2):211~218
吕坚,朱新运,高建华等.2006.九江-瑞昌地区尾波衰减特征初探[J].地震,26(4):15~21
王彩勤,郑斯华,刁桂苓等.2004.张北地震序列的尾波Q值研究[J].防震减灾工程学报,24(1):37~40
张天中,高龙生,张卫平.1990.滇西实验场区的Q值极其随时间窗变化[J].地震学报,12(1):12~21
赵卫明,杨明芝,金延龙.2000.宁夏中北部地区尾波Q值研究[J].地震学报,22(3):249~256
周翠英,王铮铮等.2005.换动地区现代地壳应力场及地震断层错动性质[J].地震地质,27(2):273~288
朱新运,刘杰,张帆等.2006.基于Aki模型的近震S波尾波Q值求解及分析软件研制[J].地震研究,29(1):76~80
Aki K.1969.Analysis of seismic coda of local earthquakes as scattered wave[J].J Geophys Res,74,615~631
Aki K,Chouet B.1975.Origin of coda waves:source,attenuation and scattering effects[J].J Geophys Ras,80,3322~3342
Aki K.1980.Scattering and attenuation of shear waves in the lithosphere[J].J Geophys Res,85,6496~6504
Gupta S C,Teotia,Rai S S,Gautam N.1998.CodaQesti matesinthe Koyna region,India[J].Pure Appl Geophys,153,713~731,of Baja California,Geol Soc Am Memoir,140,170
Hoshiba M.1991.Si mulation of multiole scattered coda waves excitation base on the enery conservation law[J].Phys EarthPlanet Interiors,67,123~136
Jin A,Aki K.1980.Spatial andtemporal correlation betweenQandscismicity andits physical mechanism[J].J Geophys Res,94,14041~14059
Mandal P and Rastogi B K.1998.Afrequency-dependent relation of cidaQCfor Koyna-Warma region,India[J].Pure ApplGeophys,153,163~177
Margerin L,Campillo M.and Tiggelen B van.1998.Radiative transfer and diffusion of waves in a layered medium:newin-sight into codaQ[J].Geophys J Int,134,247~258
Pulli J.1984.Attenuation of coda wave in New England[J].Bull Seis Soc Amer,1149~1166
Singh S,Herrmann R B.1983.Regionalization of crustal codaQin thecontinental United States[J].J Grcphys Res,88,527~538
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