五大连池火山区地震体波Q值特征

基于五大连池火山区域地方震资料，选取信噪比高、定位准确且震中位于火山区域的39个地震，根据地震波传播的三段几何衰减模型，使用地震记录位移谱，去除仪器响应、背景噪声，反演求取各频点f的S波Q值，拟合获得火山区体波Q值与f的关系为Q（f）=221.7f^0.452，计算得到老黑山、火烧山附近区域Q值与f的关系为Q（f）=152f^0.600，与国内外其他区域体波Q值进行对比，并结合火山区地质构造活动，分析五大连池火山区体波Q值特征。

Analysis of Q value character of seismic body wave in Wudalianchi volcanic area

using the local earthquake data of wudalianchi area, which are from selected 39 earthquakes with accurate locations and high noise-signal ratio, according to the three part decaying model in the course of seismic wave transmission, we reverse data and calculate Q value of S wave and obtain the result Q(f)=221.7f^0.452 in Wudalianchi volcano area with the seismic displacement spectrum after eliminating instrument response and background noise. At the same time we also get the result Q(f)=152f^0.600 in the zone below Laohei and Huoshao mount. In the end we get some conclusion from the results by comparing with other Q value of other area.