论文部分内容阅读
利用单次散射的Aki模型,选取2008年1月-2009年12月宁夏地震台网记录的82次ML≥2.0地震的数字地震波资料,计算宁夏及邻区尾波Q值,拟合Q值对频率的依赖关系。全区域数据结果为Q(f)=(212±87.62).f0.7584±0.19。与国内其它区域相比,本区域Q值较低、对频率依赖性较高。结合区域地震地质构造特征及同期地震活动性将研究区划分为四个小震密集区:吉兰泰地震区、银川地震区、卫宁同地震区和固海地震区,分区对Q值进行数据统计,对比表明,尾波Q值较好地反映了小区地震活动特征。
Using the single-scattering Aki model, the digital seismic data of 82 ML≥2.0 earthquakes recorded from January 2008 to December 2009 in Ningxia seismic network were selected to calculate the Q value of coda in Ningxia and its adjacent areas, and the Q value was fitted Frequency dependence. The overall regional data results in Q (f) = (212 ± 87.62) .f0.7584 ± 0.19. Compared with other regions in the country, the Q value is lower and the frequency is more dependent. According to the regional seismotectonic features and contemporaneous seismicity, the study area is divided into four small seismic concentrated areas: Jilantai earthquake area, Yinchuan earthquake area, Weining same earthquake area and Guhai earthquake area, Statistics and comparison show that the coda Q value reflects the seismic activity characteristics of the area.