简介:一、地震基本参数表1 地震基本参数表发震时间年月日时分秒震 中 位 置微 观宏 观东经北纬东经北纬参考地名震级(ML)震源深度(Km)震中烈度 地震类型 1978112305492591184°239°漳浦海外41Ⅴ主震型 注:震中位于海中,表中烈度为估计值。二、烈度分布本次地震震级不高,震中又位于海中,未造成任何破坏,但有感面积大。地震后,在厦门及漳州两地市区近海岸带的部分县城,乡镇所在地共24个点,走访600多人进行座谈形式的调查。调查均位于Ⅳ度烈度区内。地震时,室内大多数人有感觉,室外活动的人有感的较少,少数人从梦中惊醒。人们普遍感到床铺等在摇摆,听到玻璃窗在轻微作响。图6-1 1998
简介:一、地震基本参数表1 地震基本参数表发震时间年月日时分秒震 中 位 置微 观宏 观东经北纬东经北纬参考地名震级(MS)震源深度(Km)震中烈度 地震类型 199211261847565116°57′25°29′116°57′25°32′连城赖源508Ⅵ主余震型 表中的宏观震中为Ⅵ度等震线的中心位置,位于微观震中南6公里左右。二、地震烈度分布现场考察共勾划出Ⅵ、Ⅴ、Ⅳ度三条等震线(见图16-1)。图16-1 1992年11月26日连城赖源地震等震线图Ⅵ度区:Ⅵ等震线东起赖源乡东西,向北经莒溪乡余地村南,拐向西南穿过东坑村北及冯地村,到陈地村北再转向北东。呈长轴北东50度展布的椭圆形,长轴长约2
简介:AMW6.4earthquakeoccurredinL'Aquila,centralItalyat1:32:42(UTC),April6,2009.WequicklyobtainedthemomenttensorsolutionoftheearthquakebyinvertingthePwaveformsofbroadbandrecordingsfromtheglobalseismographicnetwork(GSN)stationsusingthequicktechniqueofmomenttensorinversion,andfurtherinferredthatthenodalplaneofstrike132°,dip53°andrake-103°istheseismogenicfault.
简介:2009LAquila,意大利地震加亮由于不适当的加强造结构的历史性的石工技术的地震危险翻新在最后50年里被做了的工作。意大利的地震标准推荐象用新增强的水泥(RC)或钢元素代替原来的木房顶结构那样的传统的加强技术的使用,插入在石工技术和新RC地板的RC关系横梁,并且使用shear墙上的RCjacketing。LAquila地震揭示了这些干预的众多的限制,因为他们导致了增加的地震力量(由于更大的另外的重量)并且到有存在的合并元素的变丑不兼容,石工技术围。这篇论文提供技术问题与相关的讨论地震圣特玛丽亚diCollemaggio长方形会堂翻新,特别地,最后(2000)的限制翻新干预。因为可疑行动和不正确、不适当的技术选择,可观的损坏被引起到教堂。
简介:Weuseinterferometricsyntheticapertureradar(InSAR)andbroadbandseismicwaveformdatatoestimateasourcemodelofthe11thJuly,2004MW6.2Zhongbaearthquake,TibetofChina.ThiseventoccurredwithintheseismicallyactivezoneofsouthwesternTibetanPlateauwheretheeast-westextensionoftheuppercrustisobserved.BecauseoflimitationsinonepairofInSARdataavailable,therearetrade-offsamongcentroiddepth,ruptureareaandamountofslip.Availableseismicdatatightlyconstrainthefocalmechanismandcentroiddepthoftheearthquakebutnotthehorizontallocation.Together,twocomplementarydatasetscanbeusedtoidentifytheactualfaultplane,betterconstraintheslipmodelandeventlocation.Wefirstuseregionalseismicwaveformtoestimatepointsourcemechanism,thenInSARdataisusedtoobtainbetterlocation.Finally,ajointinversionofteleseismicP-wavesandInSARdataisperformedtoobtainadistributedmodel.Ourpreferredpointsourcemechanismindicatesaseismicmomentof~2.2×1018N·m(~MW6.2),afaultplanesolutionof171°(342°)/42°(48°)/-83°(-97°),correspondingtostrike/dip/rake,andadepthof11km.Thefaultplanewithstrikeof171°anddipof42°isidentifiedastherupturedfaultwiththeaidofInSARdata.Thepreferredsourcemodelfeaturescompactareaofslipsbetweendepthof5-11kmand10kmalongstrikewithmaximumslipamplitudeofabout1.5m.
简介:The2009MW7.8Fiordland(NewZealand)earthquakeisthelargesttohaveoccurredinNewZealandsincethe1931MW7.8Hawke'sBayearthquake,1000kmtothenorthwest.InthispapertwotracksofALOSPALSARinterferograms(oneascendingandonedescending)areusedtodeterminefaultgeometryandslipdistributionofthislargeearthquake.Modelingtheeventasdislocationinanelastichalf-spacesuggeststhattheearthquakeresultedfromsliponaSSW-NNEorientatedthrustfaultthatisassociatedwiththesubductionbetweenthePacificandAustralianPlates,withobliquedisplacementofupto6.3m.ThisfindingisconsistentwiththepreliminarystudiesundertakenbytheUSGSusingseismicdata.
简介:Usingatimeseriesmethodthatcombinesboththepersistentscattererandsmallbaselineapproaches,weanalyzed9scenesEnvisatASARdataovertheL’Aquilaearthquake,andobtainedaShocke’sdisplacementfieldanditsevolutionprocesses.Theresultsshowthat:(1)EnvisatASARclearlydetectedthewholeprocessesofdisplacementfieldoftheL’Aquilaearthquake,anddistinctvariationsatdifferentstagesofthedisplacementfield.(2)Preseismiccreepdisplacement?displacementmutationwhenfaulting?constantlysloweddownaftertheearthquake.(3)Theareaofthestrongestdeformationandgroundrupturewasalow-lyingovaldepressionregiontothesoutheast.Surfacefaultingwithinazoneofabout22km914km,withanorientationof135°,occurredalongtheNW-strikingandSW-dippingPaganica-S.Demetrionormalfault.(4)Inanalyzinganareaofabout54km959km,boundedbynorth–southaxistotheepicenter,thedisplacementfieldhassignificantcharacteristicsofawatershed:westwardoftheepicentershowsupliftwithmaximumof130mminline-of-sight(LOS),andeastoftheepicenterwasaregionwith220mmofmaximumsubsidenceintheLOS,concentratingontherupturezone,themajorityofwhichformedinthecourseoffaultingandsubsequence.
简介:正Thethesisofthepaper,whichistheobjectofthisDiscussion,isthattheconsiderabledamagesufferedbytheBasilica,aftertheearthquakeofL'Aquilain2009,wastheexclusiveresultoftheinterventionofseismicimprovementofthenaves,madein2000;such
简介:正Theauthorsthankthediscusserforhisinterestandcarefulreviewofthepaperandhisvaluablecomments.Theyalsowelcomethisdiscussion,becauseitgivestheauthorstheopportunitytoclarifyseveralpointswhichwerenotexplainedinsufficientdetailinthepaper,due