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

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.

INVERSION OF NON-ELASTIC DAMPING COEFFICIENT, FIELD RESPONSE AND FOCAL PARAMETERS OF SHANXI AREA WITH GENETIC ALGORITHM

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.