【摘要】 分别利用Aki模型和Sato模型,选取2008年1月—2009年12月宁夏地震台网记录的ML≥2.0地震的数字地震波资料,计算了宁夏及邻区平均尾波Q值,并拟合了Q值对频率的依赖关系。结果为:Aki模型为Q(f)=(212±87.62)f0.758 4±0.19;Sato模型为Q(f)=(44.81±15.87)f0.949 1±0.080 5。与国内其他区域相比,两种模型计算结果均显示本区域Q值较低,对频率依赖性较高。研究结果认为两种模型均适合对宁夏及邻区尾波Q值的研究。更多还原

【Abstract】 With the Aki model and the Sato model separately,adopting digital earthquake wave datas above ML 2.0 from January,2008 to December,2009,which was recorded by Ningxia earthquake nets,the average Q value of seismic coda in relative regions is calculated,and the relation between Q value and frequency is simulated.The results are as follows:with the Aki model:Q(f)=(212±87.62)f 0.758 4±0.19,the Sato model:Q(f)=(44.81±15.87)f 0.949 1±0.080 5.Compared with other domestic regions,the results with both of the two models show that the Q value of seismic coda is relatively lower,but the dependence on frequency is higher.So it is considered that the tectonic activity and seismicity are rather high in this region.The Q values in different areas are related with geologic tectonic,and reflect seismicity’s features of the corresponding regions.Results of the two models are comparatively identical,it is considered that the two models are both fit for the research on the Q value of seismic coda in Ningxia and adjacent regions.更多还原