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SARdata(200401104,20051015)andfivescenesofJERS-1SARdata(19930615,19940829,19950816,19980707,19980820).TheseSARdataareprocessedusingtwo-passandthree-passdifferentialinterferomertrymode.ButusingtheENVISATSARdatacannotobtainthedeformationresultbecauseofthepoorcoherenceofthedata.IobtainedtheperfectdeformationresultusingthepairJERS-1SARdata(19950816/19980820).Theresultsshowthatduringthethreeyearsfrom1995to1998,therewere6-12cmLOSdeformationintheareaofMt.JianbaivolcanowhichislocatedinthesoutheastofMt.Changbaivolcano.Althoughthereisnootherinformationcantestthisresult,thefrequentearthquakescandemonstratetheactivityofthisarea.

④ExperimentalresearchofCR-InSARtechnologyintheareaofMt.Changbaivolcano.

AlthoughInSARmakesupforthelackofmanypreviousmeasuringmethods(suchasleveling,GPSetc),andcanmonitorlarge-scalesurfacedeformation,havingimmenseadvantages.,itslimitionofapplicationcannotbeneglected,whichresultsinsomeuncertaintiesofresults,suchastemporalunrelated,spatialunrelatedanddelaycausedbyatmosphericeffect.Alltheseinfluentialfactorscanbringsomeerrorstointerferometrydeformationmeasure.TheappearanceofCR-InSAR(CornerReflectorInSAR)andPS-InSAR(PermanentScatteres,InSAR)enhanceseffectivelytemporalcoherenceandspatialcoherenceoftheserepeat-passimageseries,realizingobservationsofsmalldeformationinvegetativecoverareas.Moreover,accuracyofCR-InSARmonitoringisbetterthanaccuracyofconventionalInSAR.

Aftertheearlierpreparation,includinganalysisofthegeologicalbackground,interpretingremotesensingimages,analysisoftopographyandmorphology,tencornerreflectorswereinstalledaroundtheMt.ChangbaivolcanoinAugust2006,inordertomakeexperimentalresearchintheareaofMt.Changbaivolcano.OnApril13,2007thefirstENVISATSARdataafterinstallingthecornerreflectorsareacquired.BasedontheSARdataanalysissevenfeaturepointswerefoundexceptthethreepointsatthealtitudeabove1600m,thereasonmaybethesnowhasnotmelted.

⑤SimulationcalculationwascarriedoutbymeansofMogipointsourcemodelandOkadatensilepointsourcemodel.

Inordertostudytheactivityofthemagmachamberatdifferentperiods,thisworkusestheJERS-1dataof1995~1998andthedataofGPSandlevelingof2002-2003tosimulatetheparametersofthemagmaattheMt.Changbaivolcano.

Inthisthesis,Itrytousedifferentmodelsanddifferentbinationmodelstosimulatingcalculation,suchasMogisinglepointsource,Mogitwo-pointssource,Okadatriaxialtensilemodel,thebinedmodelofMogitwo-pointssourceandOkadatensilemodel.ThroughparativeanalysisoftheerrorsitisfoundthattheMogitwo-pointssourcemodelistheoptimumfittingmethods.Apointsourceislocatedat7.9kmbelowoftheMt.ChangbaiTianchivolcano,anotherislocatedat5.5kmbelowoftheMt.Jianbaivolcano.ItisfoundthattheinversionresultoftheMogidoublepointsourceandtheresultoftheD-InSARareingoodagreement,andtheforwardsimulationresultofthedeformationfieldobtainedbyD-InSARtechnologyisalsosatisfactory.TheinversioncalculationresultofOkadatriaxialtensilemodelshowsthatthesourceislocatedatthenorthoftheTianchicraterandthereisanobviouslytensileponentinthedirectionofNNWandNWW.Thisresultaccordswellwiththeresultofdeepgeophysicalprobing.ThetriaxialtensilesourceisconsideredtogivethedetailedparametersofthemagmachamberwhichislocatedbelowinMt.Changbaivolcano.

Fromtheseresultswecaninferthattheremaybeachannelbetweenthetwomagmachambersbecauseofthedirectionofthistwomagmachamberisconsistentwiththestrikeofthehiddenfaultwhichhasseismicactivityinthisarea.Magmaticactivityandmigrationmaybethereasonofactivityoffaultactivityandseismicactivity.ThevolcanicactivityintheareaoftheMt.Changbaihasintermittenceintimeandmigrationinspace.

Theactivityofthevolcanoislikelyinthestagefromaninitialdisturbancesstatetoaroilytstage.Inordertoforecaststheeruptiveriskofthevolcano,themonitoringofearthquakes,deformation,hydration,especiallycontinuousmeasurementatfixedstationshouldbeenhanced.

Keywords:D-InSAR,CR-InSAR,Mt.Changbaivolcano,Mogipointsourcemodel,Okadatensilepointsourcemodel,volcanomagmachamberparameter.

论文中英文摘要

作者姓名:李红光

论文题目:KH积分方法合成地震图的研究

作者简介:,男,年月出生,年月师从于,于年月获学位.PP,PS,pPP,pPS,pSP,pSSKH积分方法推广到计算近震/远震转换波响应,推导出转换波的KH积分公式,分别计算了水平界面与弯曲界面上的近震/远震转换波响应,通过与反射率法,动力学射线追踪及有限差分方法的对比,表明KH方法能够很好地模拟不规则界面上的近震/远震转换波.

最后我们用KH方法分别计算了含有多层界面介质中的反射波响应和速度梯度变化介质中的回折波响应,与反射率方法结果非常相近.

我们的研究表明,KH积分方法是一种较好地模拟横向非均匀介质的合成地震图方法,其计算精度不亚于其他方法,且计算效率高.

关键词:KH积分方法,合成地震图,转换波,反射波

Studyonthe"Kirchhoff-HelmholtzSyntheticSeismograms"

LiHongguang

ABSTRACT

Inthispaper,authorsystematicallyandsuccinctlyintroducedthebasictheoryandthebasisequationsofKirchhoff-Helmholtz(KH)integral,andappliedthemethodtotheseismologicalproblemsofreflectedwave,convertedwaveandrefractedwave.TheKHintegralisoneoftheboundaryintegralmethods,itisderivedintermsofwaveequationandtransfo

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