根据兰州临时微震台网的数字化微震记录,采用三段几何衰减模型拟合,利用Atkinson方法和遗传算法,得到兰州市及其附近地区介质的几何衰减函数,非弹性衰减Q值随频率的关系为Q(f)=45.1f1.488。并对研究结果对比其他地区进行了分析讨论。 According to the digital microseismic records of Lanzhou temporary microseismic network, the geometrical attenuation function of Lanzhou city and its vicinity was obtained by Atkinson method and genetic algorithm by using three-segment geometric attenuation model fitting. The relationship between the inelastic attenuation Q value and frequency was Q (f) = 45.1f1.488. The results of the analysis compared with other regions were analyzed and discussed.