Dispersion attenuation structure of the crust around the Weifang-Jiashan segment of the Tanlu fault zone in North China-中国期刊网

摘要 Ontheconditionthatthevelocityratioofcompressivewavetoshearwaveisstableduringthepropagatingprocessofseismicwave,thispaperdevelopsanestimationmethodformediumqualityfactorbasedonsinglestation'straveltimedifferencebetweendirectSandPwavesandthefirstperiodsignalofdirectPwave.8774highSNRwavedataaltogetherrecordedby75stationsareanalyzed.Theresultsshowthat:(1)underthenormalregionalstressfield,thequalityfactorsQmSPinthestabletectonicareaarehigherthanthatintheactivetectonicareaaroundtheWeifang-JiashansectionanditssurroundingareaintheTanlufaultzone;(2)intheJuxian-Tanchengsectiontheseismicwaveattenuationisrelativelyquick,andthemediaisrelativelybroken,suggestingnotectonicstressaccumulation;(3)theXinyi-Sihongsectioniscurrentlylockingandinaccumulatingelasticstrainenergystage,whichhasthedeepenvironmentandconditionsofstrongearthquakegenerationsimilartothoseofthe1668M8.5Tanchengstrongearthquake.

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Dispersion attenuation structure of the crust around the Weifang-Jiashan segment of the Tanlu fault zone in North China

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Dispersion attenuation structure of the crust around the Weifang-Jiashan segment of the Tanlu fault zone in North China

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