【摘要】 根据甘肃数字地震台网21个子台的437条波形记录,采用三段几何衰减模型,利用Atkinson方法和遗传算法,研究了青藏高原东北缘地区的非弹性衰减Q值和各台站的场地响应,得到该地区非弹性衰减Q值与频率f的关系为:Q(f)=564.7f0.3;21个子台中,除了武都、合作、湟源、定西和迭部等台的场地响应总体上没有放大效应以外,其余台站均存在较明显的放大效应。更多还原

【Abstract】 According to 437 horizontal-component seismograms recorded at 21 stations of Gansu Digital Seismic Network,we used Genetic Algorithm and Atkinson’s method to study the inelastic attenuation value Q of the northeastern margin of Qinghai-Tibet plateau and the site response of each station based on the trilinear geometrical spreading model.The results indicate that the frequency-dependent of inelastic attenuation value Q in the studied area is estimated as:Q(f)=564.7f 0.3.The site response shows significant amplification at every station except for the Wudu,Hezuo,Huangyuan,Dingxi,Diebu stations.更多还原