【摘要】 根据单次散射模型的尾波功率谱分析方法,利用陕西数字地震台网宽频带数字地震波形记录资料,计算了关中陕南及周边地区13个频段的Qc值。结果显示:在2ts~35 s的时间窗内,Q0值在37.54~72.59之间,全区平均值为58.44,在上升运动显著的秦岭山脉值较大,关中盆地和陕南值较小;在2ts~70 s的时间窗内,Q0值在194.74~283.50 之间,全区平均值为186.79,莫霍界面高波速区值较大,低速区和低速梯度带值较小。更多还原

【Abstract】 According to the method of power spectrum analysis of individual dispersion model,using the wide-band digital waveform data recorded by Shaanxi digital seismograph network, the Q_c values of coda wave in 13 frequency bands in Guanzhong,Shannan and the adjacent areas are estimated. The result shows that the coda Q₀ values are in range of 37.54⁷8.59 with the average value of 58.44 in the 2t_s³5 s time window,and are higher in Qinling mountain chain region where the ascending motion is marked, otherwise are lower in Guanzhong basin and Shannan area. In the 2t_s⁷0 s time window, the Q₀ values are in range of 194.74²83.50 with the average value of 186.79,and are higher in wave highvelocity area of moho-discontinuity comparing with lower values in wave lowvelocity area and lowvelocity gradient belt.更多还原