利用遗传算法反演山西地区非弹性衰减系数和场地响应
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摘要
运用山西地震台网的27条数字地震波形资料,基于遗传算法,用Atkinson方法得到山西地区的品质因子Q值随频率的关系。采用Moya方法反演地震的台站场地响应,40个台站的场地响应均表现为与频率有关,其中27个台站的场地响应在频率域不平坦,只有部分台站的场地响应基本没有放大,在1附近,主要是由于这些台站的仪器安放于干扰较小的山洞所致。
Based on the 27 digital seismic waveforms data from Shanxi seismic network,the quality factor Q with frequency of Shanxi region are inversed by Atkinson's genetic algorithm.Site responses of 40 stations are inversed by Moya method.Site response of all stations are frequency related.Among which,site responses of 27 stations are uneven in frequency domain.Only a number of the stations almost have no site magnification,due to their quiet instrument environments in caves.
Based on the 27 digital seismic waveforms data from Shanxi seismic network,the quality factor Q with frequency of Shanxi region are inversed by Atkinson's genetic algorithm.Site responses of 40 stations are inversed by Moya method.Site response of all stations are frequency related.Among which,site responses of 27 stations are uneven in frequency domain.Only a number of the stations almost have no site magnification,due to their quiet instrument environments in caves.
引文
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[11]王勤彩,高景春,郑斯华,等.华北中北部地区震源参数和场地响应的联合反演[J].中国地震,2004,20(2):187-196.
[12]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.
[13]Brune J H.Tectonic stress and the spectra lf seismic shearwaves fuon earthquakes[J].J Geophys Res,1970,75:4997-5009.
[2]Bindi.Source pauameters estimated foum the aftershock ofthe 1997 Umbria Marche(Italy)seismic sequence[J].BullSeis Soc Amer,2001,91(3):448-455.
[3]宋美琴,梁向军,宁亚灵.山西地区构造环境剪应力场研究[J].山西地震,2008(2):1-8.
[4]宋美琴,王秀文,梁向军,等.山西代县震群序列特征及其指示意义[J].山西地震,2007(2):10-12.
[5]宋美琴,李斌,吕芳,等.2010年1月24日山西河津-万荣MS4.8级地震特征[J].地震地磁观测与研究,2012,33(1):16-22.
[6]宋美琴,郑勇,葛粲,等.山西地震带中小震精确位置及其显示的山西地震构造特征[J].地球物理学报,2012,55(2):513-525.
[7]Atkinson G M,Mereu R F.The shape of ground motion atten-uation curves in southeastern Canada[J].Bull Seis Soc A-mer,1992,82:2014-2031.
[8]Moya C A,Aguirre J,Irikura K.Inversion of source parame-ters and site effects from strong ground motion records usinggenetic algouithms[J].Bul Seis Soc Amer,2000,90(4):977-992.
[9]宋美琴,王秀文,梁向军,等.利用数字化波形资料研究山西中南部地区的非弹性衰减系数、震源参数和场地响应[J].山西地震,2007(4):1-17.
[10]啜永清,苏燕,贾建喜,等.山西地区的非弹性衰减系数、地响应和震源参数场的研究[J].地震学报,2004,26(4):369-378.
[11]王勤彩,高景春,郑斯华,等.华北中北部地区震源参数和场地响应的联合反演[J].中国地震,2004,20(2):187-196.
[12]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.
[13]Brune J H.Tectonic stress and the spectra lf seismic shearwaves fuon earthquakes[J].J Geophys Res,1970,75:4997-5009.
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