宁夏及邻区尾波Q值分布特征

The distributing characters of coda wave Q value in Ningxia and its adjacent region

应用宁夏 9个台站 1986年后记录的宁夏及邻区 132次地震的 2 0 0条DD - 1仪模拟记录 ,对宁夏及邻区的分区尾波Q值进行了研究。结果表明 ,分区尾波Q值主要与地质构造有关。Q值相对较低的区域为吉兰泰盆地 ,银川盆地南段的吴忠、灵武 ,阿拉善左旗西南 ,中卫至海原之间 ,吴忠、灵武至盐池之间 ;相对较高的区域为乌海及附近 ,贺兰山、永宁至大武口之间。

simulation recordings, which were 132 earthquakes, occurred in Ningxia and its adjacent region and were recorded on 9 seismographs of DD-1 type in Ningxia, have been studied. The results indicated that Q values in different areas mainly related with geologic tectonic.The areas where Q value are relatively lower are Jilantai Basin,Wuzhong and Lingwu in south section of Yinchuan basin,the southwest part of Alashanzuoqi,Zhongwei to Haiyuan, and Wuzhong and Lingwu to Yanchi.The areas where Q value are relatively higher are Wuhai and neighboring region, the Helan Mountain, and Yongning to Dawukou.