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基于单次散射模型的尾波功率谱分析法，利用西昌遥测台网地震波实时处理系统记录的２４个地震数字化波形资料，计算了西昌地区地球介质对应于１３个不同频率的ＱＣ值。在１．０～２０．０Ｈｚ频率范围内，以幂函数ＱＣ＝Ｑ０ｆｎ拟合ＱＣ值随频率的变化关系。其中Ｑ０值在４３．０～８２．４之间，ｎ值在０．２４～０．９４之间。平均值分别为６６．２和０．５３。
Based on the coda power spectral analysis method of single scattering model, the QC values of earth media corresponding to 13 different frequencies in Xichang area were calculated by using 24 seismic digitized waveform data recorded by the Xichang telemetry network real time processing system. In the frequency range of 1.0 ~ 20.0Hz, with the power function QC = Q0fn fit QC value with frequency changes. The Q0 value is between 43.0 and 82.4, and the n value is between 0.24 and 0.94. The average values were 66.2 and 0.53 respectively.