简介:Inthispaper,ahistoricalreviewoftheseismicnetworkofVietnamandtheabilityofthenetworktomonitorearthquakesispresented.TheseismicactivityofVietnamasacountryofhighseismictiyinthelastcenturyandsincethebeginningofthenewcenturyisdescribed.ThecurrentstateofseismologicalresearchinVietnamandcooperationwithinstitutionsoutsideofVietnamisoutlined.
简介:Duringtheperiodof1999~2002,theChineseseismologistsmadeaseriousofdevelopmentsinthestudyonseismicsourcesincludingobservations,experimentsandtheory.Inthefieldofobservation,themethodsoftheaccuracylocationofearthquakesources,theinversionofseismicmomenttensorandthemechanismofearthquakesourceareimprovedanddeveloped.Alotofimportantearthquakeeventsarestudiedbyusingthesemethods.Theruptureprocessesoftheseeventsareinvertedandinvestigatedcombinedwiththelocalstressfieldsandthetectonicmomentbyusingthemeasurementsofsurfacedeformation.Inthefieldsofexperimentsandtheory,manydevelopmentsareobtainedincauseofseismicformation,conditionofstressandtectonics,dynamicsofearthquakerupture,rockfractureandnucleationofstrongearthquakes.
简介:ThedevelopmentofseismicwavestudyinChinainthepastfouryearsisreviewed.Thediscussionisdividedintoseveralaspects,includingseismicwavepropagationinlaterallyhomogeneousmedia,laterallyheterogeneousmedia,anisotropicandporousmedia,surfacewaveandseismicwaveinversion,andseismicwavestudyinprospectingandloggingproblems.Importantprojectsinthecurrentstudiesonseismicwaveissuggestedasthedevelopmentofhighefficientnumericalmethods,andapplyingthemtothestudiesofexcitationandpropagationofseismicwavesincomplexmediaandstronggroundmotion,whichwillformafoundationforrefinedearthquakehazardanalysisandprediction.
简介:AMethodofImprovingSeismicDataResolution:ComprehensiveInversionofWellloggingandSeismicDataZhangYufen;HongFeng(DepartmentofAppl...
简介:分叉的河隧道和象长期的捱过和侵蚀的结果的山谷,山脉,山,和斜坡的共存形成唯一的黄土地形学。Changqing地球物理的公司,处于这些复杂条件工作,为高保真处理和地震数据的好解释建立了技术的一间套房。这篇文章介绍涉及处理的数据和解释的进程并且说明结果。关键词黄土高原-地震数据处理-静电干扰-箱优化-噪音变细-在教授水平的高级工程师数据解释第一作者江家玉从北京石油研究所在地球物理的探索毕业了,一所美国学院1970。她从事了关于地震数据的全面解释的研究。现在她在Dongfang地球物理的同伴的研究院的Changqing分割工作。26篇文章被出版。她授于我国家科学与技术的班奖金,和科学与技术的进步奖金由部和局进行四十次。
简介:盖住北方Shaanxi斜坡和Tianhuan消沉的黄土高原由地区性的单斜层组成,在东方高、在西方低,与不到10的剧降。在这个区域的结构的运动是弱的以便差错和本地结构很好没被开发。作为有大小的结果,众多的宽、轻轻的鼻子和小陷井,不到50m在大向西蘸的单斜层上被开发。包括在Ordos盆的中生代油水库和古生代的煤气的水库,水库是主导地有结构的水库的一个小数字的lithologic。单个水库与大侧面的变化,强壮的anisotropy,低孔,低渗透,和低丰富作为薄被描绘。为预言微妙的lithologic水库的水库厚度,物理性质,和烃潜力的一系列途径基于侵蚀表面的解释被建立。关键词当模特儿-侵蚀表面-解释-Seisnmic数据和水库预言
简介:Summarizingtheexistingdataofseismologicalandgeologicalinvestigationsanclorstrongandintermediate-strongearthquakesintheSichuanbasinanditsadjacentareasaccumulatedbytheseismologicalandpetroleumorganizationsinSichuanandoftheresultsofseismicprospectinganddetailedexplorationinChengdudepressionduringthelast20yearspermittednstostudythetypesanddistributionofhiddenstructuresinChengdudepressionanditsadjacentareas,inparticular,toidentifyindetailthe"hiddenfaults"intheChenngdu-Deyangareaontheonehand;TheobtaineddataindicatethattheNE-trendingXinjinfaultrunsnorthwardanddiesoutinthesouthofPenzhentownofShuangiiuCounty.Meanwhile,westudiedgeneticrelationsofseismicactivitytoactivefaultsandtheircorrespondingmovementcharacteristicsontheotherhand.Moreover,thesurfacefaultsanddeep-seatedfaultsareclearlydefinedandoutlined,and5typesofseismogenicfaultssuggested.TheknowledgethusobtainedenablesustodelimitthefocalzonesforpotentialstrongearthquakesinChengdudepression.Thestudysuggeststhatazoneof40kmwideandmorethan100kmlongonsidesalongtheChengdu-Deyanglinehasastableseismogeologicalbackgroundandgoodengineering-seismologicalconditions.
简介:TheFederalHighwayAdministration(FHWA)sponsoredalarge,multi-yearprojectconductedbytheMultidisciplinaryCenterforEarthquakeEngineeringResearch(MCEER)titled"SeismicVulnerabilityofNewHighwayConstruction"(MCEERProject112),whichwascompletedin1998.MCEERcoordinatedtheworkofmanyresearchers,whoperformedstudiesontheseismicdesignandvulnerabilityanalysisofhighwaybridges,tunnels,andretainingstructures.Extensiveresearchwasconductedtoproviderevisionsandimprovementstocurrentdesignanddetailingapproachesandnationaldesignspecificationsforhighwaybridges.Theprogramincludedbothanalyticalandexperimentalstudies,andaddressedseismichazardexposureandgroundmotioninputfortheU.S.highwaysystem;foundationdesignandsoilbehavior;structuralimportance,analysis,andresponse;structuraldesignissuesanddetails;andstructuraldesigncriteria.
简介:Thisstudyshowscrossholeseismictechnologycanoffernotonlyimagesofcrossholetomography,butalsoreflectsectionsofhighresolution.Properprocessingofcrossholeseismicreflectdataproducesahighqualitysectionbetweentwowells.Thinbeds,faultsandothergeologicphenomenacanbefoundclearlyinthissection.Sodetailedreservoirdescriptioncouldbeformedtoguidetheoilfielddevelopmentplan.Meanwhile,crossholetechnologycanbedirectlyusedtomonitortheprocessofoilfieldinjectionandenhancedoilrecovery,soithasawidescopeofusageinoilfielddevelopment.
简介:SeismicanisotropybeneathSouthernTibetQING-TIANLUI(吕庆田),KAI-YIMA(马开义),MEIJIANG'(姜枚),A.HirnandA.Nercessian(InstituteofMineralDe...
简介:Thephysicalmeasuresofmacroscopicseismicintensityhavebeenextensivelystudiedbasedonthenewunderstandingofseismicintensityandthenewanalyticalmethodandnewdatabaseofstronggroundmotion.Newphysicalmeasuresofseismicintensityhavebeenproposed.
简介:SeveralfactorsareselectedtoreflectthetemporalandspatialfeaturesofseismicityinSouthwestChina.Themeasurementsofthefactorsarealltakenfromthestatisticalrelationbetweenthefactorsandactualearthquakes,andmakethefactorspossessacertainprobabilisticpredictionmeaningandthebaseformutualcontrast.Theeffectsofpredictionofpartofthefactorshavebeenevaluatedandusedtocorrectthefactors.Threesetsofseismicspatialdistributionfunctionshavebeencalculatedbyusingthreedifferentmethodsanddiscussedindetail.
简介:Theobjectiveofthisresearchistodeterminetheeffectearthquakeshaveontheperformanceoftransportationnetworksystems.Todothis,bridgefragilitycurves,expressedasafunctionofpeakgroundacceleration(PGA)andpeakgroundvelocity(PGV),weredeveloped.Networkdamagewasevaluatedunderthe1994Northridgeearthquakeandscenarioearthquakes.Aprobabilisticmodelwasdevelopedtodeterminetheeffectofrepairofbridgedamageontheimprovementofthenetworkperformanceasdayspassedaftertheevent.Asanexample,thesystemperformancedegradationmeasuredintermsofanindex,"DriversDelay,"iscalculatedfortheLosAngelesareatransportationsystem,andlossesduetoDriversDelaywithandwithoutretrofitwereestimated.