利用遗传算法反演山西地区非弹性衰减系数、场地响应和震源参数
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
利用山西台网的数字波形资料,基于遗传算法,用Atkinson方法得到山西地区介质的品质因子Q值随频率的关系为Q=420.7f0.369。采用Moya方法反演山西数字地震台网40个台站的场地响应均表现与频率有关,其中27个台站的场地响应在频率域不平坦,只有13个台站的场地响应基本没有放大。震源参数的计算结果表明,地震震级与地震距呈线性关系,但地震距与应力降以及应力降与震源半径之间的依赖关系不太明确。
Using digital waveform data of Shanxi network,the relation of quality factor Q of the medium of Shanxi region with frequency:Q=420f 0.369 is gained with the method of Atkinson of the genetic algorithm.The field response of 40 stations of Shanxi digital earthquake network were inverted with the method Moya that all of them appear related with frequency,in which,field responses of 27 stations are not flat in frequency domain,and field responses of only 13 stations are not magnified basically.Calculated result of focal parameters indicates that the relation between earthquake magnitude and seismic moment appears linear and that but the dependent relations between seismic moment and stress drop,stress drop and focal radius are not clear.
引文
1 Hough S E,Lees J M and Monastero F.Attenuation andsource puoperties at the Coso Geothermal area,Califoumia[J].Bull Eeis Soc.,1999,70:503-527.
    2 Bindi,et al.Source pauameters estimated from the aftershockof the 1997 Umbria Marche(Italy)seismic sequence[J].Bull Seis Soc Amer.,2001,91(3):448-455.
    3 Akinson G M and Mereu R F.The shape of ground motion at-tenuation curves in southeastern Canada[J].Bull Seis SocAmer.,1992,82:2 014-2 031.
    4 Moya C A,Aguirre J and Irikura K.Inversion of source pa-rameters and site effects from strong ground motion recordsusing genetic algouithms[J].Bul Seis Soc Amer.,2000,90(4):977-992.
    5宋美琴,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.
    6啜永清,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.
    7王勤彩,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.
    8刘杰,郑斯华,黄玉龙.利用遗传算法反演非弹性衰减系数、震源和场地响应[J].地震学报,2003,25(2):211-218.
    9 Moya C A,Aguirre J and Irikura K.Inversing of source pa-rameters and site effects from strong ground motion recordsusing genetic algorithms[J].Bull Seis Soc Amer.,2000,90(4):977-992.
    10 Brune J H.Tectonic stress and the spectra lf seismic shearwaves from earthquakes[J].J Geophys Res.,1998,75:4 997-5 009.
    11 Kanamori H.The energy release in great earthquake[J].JGeophys Res.,1977,(82):2 981-2 987.
    12 Hanks T C and Kanamori H.A moment nagnitude scale e[J].J Geophys Res.,1979,84(B5):2 348-2 350.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心