五大连池火山区地震体波Q值特征
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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) = 221.7 f~(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.
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) = 221.7 f~(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.
引文
高亮,张守国,闫峰.五大连池火山区尾波Q值研究[J].地震地磁观测与研究,2013,34(1/2):41-46.
梁国经,李仲巍,郑双凤,等.龙岗火山区尾波Q值的初步研究[J].地震地质,2011,33(1):114-122.
彭年,刘永顺,韦玉凤.五大连池新期火山岩浆房动力稳定性探讨[J].岩石矿物学杂志,2005,24(3):198-204.
张凤鸣,张守国,邹卫东.五大连池火山构造地震空间分布及其构造含义[J].东北地震研究,1996,12(4):17-22.
赵谊,邹卫东,周皓.五大连池火山危险性分析[J].自然灾害学报,1999,8(4):140-146.
AkiK. Attenuationofshear-wavesinthelithosphereforfrequenciesfrom0.05to25Hz[J].PhysicsoftheEarthandPlanetary Interiors, 1980, 21(1):56-60.
AkiK.Scatteringandattenuationofshearwavesinthelithosphere[J].JournalofGeophysicalResearch:SolidEarth,1980,85 (B11):6 496-6 504.
Atkinson G M, Mereu R F. The shape of ground motion attenuation curves in southeastern Canada[J].Bull Seismol Soc Am,1992,82(5):2014-2031.
梁国经,李仲巍,郑双凤,等.龙岗火山区尾波Q值的初步研究[J].地震地质,2011,33(1):114-122.
彭年,刘永顺,韦玉凤.五大连池新期火山岩浆房动力稳定性探讨[J].岩石矿物学杂志,2005,24(3):198-204.
张凤鸣,张守国,邹卫东.五大连池火山构造地震空间分布及其构造含义[J].东北地震研究,1996,12(4):17-22.
赵谊,邹卫东,周皓.五大连池火山危险性分析[J].自然灾害学报,1999,8(4):140-146.
AkiK. Attenuationofshear-wavesinthelithosphereforfrequenciesfrom0.05to25Hz[J].PhysicsoftheEarthandPlanetary Interiors, 1980, 21(1):56-60.
AkiK.Scatteringandattenuationofshearwavesinthelithosphere[J].JournalofGeophysicalResearch:SolidEarth,1980,85 (B11):6 496-6 504.
Atkinson G M, Mereu R F. The shape of ground motion attenuation curves in southeastern Canada[J].Bull Seismol Soc Am,1992,82(5):2014-2031.