南水北调中线工程核心水源区地震波Q值分析

选取2013~2015年南水北调中线工程核心水源区数字地震台网记录的141次ML≥1.5地震的数字地震资料，采用Atkinson方法计算核心水源区地震波Q值。结果表明，该地区非弹性衰减结果为Q=146.0×f(0.770 3)，处于中等Q值的构造活跃期。

Analysis of Seismic Waveform of Q Values in the Core Water Source Areafor the Central Line Project of South-to-North Water Diversion

From the digital waveforms recorded from 2013 to 2015 by the digital seismic network of the core water source area for the central line project of the south-to-north water diversion, we select the digital waveforms of 141 earthquakes with ML≥1.5. The Q values of the structure beneath the core water area are calculated by analyzing seismic waveforms using Atkinson’s method. The results show that the average Q value depends on frequency by Q=146.0*f(0.770 3), and this moderate Q value indicates that this region is in anactive tectonic period at present.