五大连池火山区地震体波Q值特征  

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

作　　者：高亮 杨选[1] Gao Liang;Yang Xuan(Guangdong Earthquake Agency,Guangzhou 510070,China)

机构地区：[1]广东省地震局,中国广州510070

出　　处：《地震地磁观测与研究》2018年第5期23-29,共7页Seismological and Geomagnetic Observation and Research

摘　　要：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。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.

关 键 词：火山地区 Q值 三段衰减模型 位移谱 

分 类 号：P315[天文地球—地震学]