内蒙古中西部地区中小地震震源参数
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摘要
依据Atkinson理论、Moya方法,基于遗传算法,选取呼和浩特数字台网记录的2001~2005年该区域ML≥2.5级57个地震事件,利用ISDP软件计算了该区域的中小地震震源参数。结果表明,参数之间存在着一定的线性关系。分析应力降与地震矩、震级之间的关系,可初步判定内蒙古中西部地区应力降符合增加应力降模型(ISD)。
The focal parameters of 57 ML≥2.5 earthquakes recorded by Hohhot digital seismic network from 2001 to 2005 are calculated with genetic algorithm.The results show that there is a linear relation within the parameters.It can determine the stress drop model(ISD) to analyze the relation of stress drop with seismic moment and magnitude.
The focal parameters of 57 ML≥2.5 earthquakes recorded by Hohhot digital seismic network from 2001 to 2005 are calculated with genetic algorithm.The results show that there is a linear relation within the parameters.It can determine the stress drop model(ISD) to analyze the relation of stress drop with seismic moment and magnitude.
引文
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[2]赵蒙生,张晁军,尹战军.1976年9月23日巴音木仁Ms6.2级地震震兆特征分析研究[J].华北地震科学,2006,24(4):23-27.
[3]章文波,谢礼立,郭明珠.利用强震记录分析场地的地震反应[J].地震学报,2001,23(6):604-614.
[4]Atkinson G M,Boore D.Newground motion relations for eastern North America[J].Bull.Seism.Soc.Amer.,1995,85:17-30.
[5]Atkinson G M,Mereu R F.The shape of ground motion attenuation curvesin Southeastern Canada[J].Bull.Seism.Soc.Amer.,1992,82:2014-2031.
[6]Moya C A,Aguirre J,Irikura K.Inversion of source parameters and site effects fromstrong ground motion records using genetic algorithms[J].Bull.Seis.Soc.Amer.,2000,90(4):977-992.
[7]Toksoz M N,D HJohnston.Seismic Wave attenuation[A].in:Geophysics Report Series no.2[C].Tulsa,Oklahoma:Society of Exploration Geo-physicists,1981.
[8]Toksoz M N,D HJohnston.Seismic Wave attenuation[A].in:Geophysics Report Series no.2[C].Tulsa,Oklahoma:Society of Exploration Geo-physicists,1981.
[9]高立新,郑斯华,丁风和.内蒙古中西部地区震源参数和场地响应反演[J].西北地震学报,2005,27(2):109-114.
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