简介：Diexiearthquake(M7.5)in1933isagreateventthatoccurredattheeastborderofQinghai-XizangPlateauinthe20thcentury.Thereareobviouslydifferentopinionsabouttheshapeofisoseismallinesandthegeneticfaultofthisearthquke.Basedonthestudyofthenewlyfoundnorth-southtrendingactivefaultandgroundfissuresofDiexiearthquake,thispapertendstoholdthat,asthesouthwardextensionofMiujiangfault,thisnorth-southtrendingactivefaultmightbethegeneticfaultofthisevent.

简介：有5.7的大小的地震在Nyingchi区域发生在2003年8月18日，西藏。macroseismic震中高位于unpopulated山区，Zhamo镇的13km南方，Bomi县。在meizoseismal区域的地震紧张是度。and区域分别地是2000km2和11000km2。这个地震事件在NE方向与在NW方向和Zhamo-Maniweng差错trending的Lhari差错trending的运动有关。由于这地震，在区域的大楼糟糕被损坏。

简介：Theverticaldeformationgradientcanreflecttherateofverticalchangeinunitdistance,andtheverticaldeformationvelocitygradientcanreflectthestrengthoftheearth'scrusttectonicactivities.Inthispaper,usinglongperiodlevelingdatacombinedwithGPSdata,theverticaldeformationgradientvaluesarecalculated.LevelingdataandGPSdataaretwodifferentmeansofmonitoringdeformation,buttheresultisapproximatelythesameverticaldeformationgradient.Theresultsshowthatthespatialdistributionoftheverticaldeformationvelocitygradientandtectonicdistributionhasanobviouscorrelation.ThemostsignificantgradientanomaliesalongtheNorth-SouthSeismicBeltareXianshuihefault,LongmenshanfaultandXiaojiang-Zemuhefault,whilethesecondgradientanomaliesinthenortheasternQinghai-TibetanplateauareZhuanglanghefaultandLenglonglingfault.TheMenyuanM_S6.4earthquakein2016occurredinthisabnormalarea.However,accordingtotheverticaldeformationhighgradientareadistribution,thereisalsothepossibilityofanearthquakeoccurrenceintheTianzhuandJingtaiarea.TheareaofconvergenceofthreemajorfaultzonesisthestrongesttectonicallyactiveregionoftheNorth-SouthSeismicBelt.

简介：

简介：TakingtheHuaihetotheNvshanhusegmentoftheTanlu(Tancheng-Lujiang)faultzoneasthemainresearchtargettoexplorewhethertherehasbeennewactivitysincethelateQuaternary,andbasedontheinterpretationofremotesensingimagesandrepeatedsurfaceinvestigations,weexcavatedtrenchesatthesectionswherethetectoniclandformissignificant,identifiedandrecordedthedeformationpatternsofthefaultandanalyzedtheactivitybehavior.Samplesofnewactivityanddeformationwerecollectedandorientedslicesweregroundbasedonthesamples'originalstatetomakethemicrostructuralanalysisanddemonstration.Alloftheaboveresearchshowsveryclearlineartectonicgeomorphologyalongthefault,threetrenchesacrossthefaultzoneallrevealednewdeformationtracessincelateQuaternary.ThelateststratumdislocatedbythefaultisthelateQuaternaryandHolocene.Themainslipmodeisstickslip,asrepresentedtypicallybyfaultscarps,wedgeaccumulation,thefaultsandthefilledcracksandsoon.Ingeneral,itshowsthecharacteristicsofbrittlehigh-speeddeformationandbelongstotheprehistoricearthquakeruins.Theaboveunderstandingwasconfirmedpartiallybymicroscopicanalysis.Inaddition,thesimilaritiesanddifferencesandthepossiblereasonsforthecharacteristicsofthelatestactivitiesoftheTancheng-LujiangfaultzoneinthenorthandsouthoftheHuaiheRiverregionsarealsodiscussedinthispaper.

简介：Onthebasisoftheviewpointofpreparationofstrongearthquakesingroup,thespatialandtemporalscanningcharacteristicsoftheseismicityintheSouthYellowSeaanditscoastregionarestudied,andsomeproblemsregardingthepredictionofseismichazardarealsodiscussed.TheresultsshowthattheseismicactivityofM=4.0earthquakeshasoverallpresentedarelativestablestate,butthepartiallyconcentratedareawbichevolvesandmigratesandtheanomalouslowb-valueareahaveappearedindifferentperiods,andthemoderatelystrongearthquakeswithM=5.0～6.0havetakenplaceontheedgeoftheanomalousarea.TheaccumulativefrequencyofM=4.0earthquakesintheanomalousareapresentsnon-linearindexaccelerationandthemoderatelystrongearthquakeshaveappearedinthelateperiodofthenon-linearindexaccelerationofM=4.0earthquakesorinthelateranomaloustranquilperiotl.ThespatialandtemporalunevenPhenomenonofseismicityhassomestabilityandreproducibility,andhassom

简介：Longling-Ruili差错是在西南的中国的一个重要活跃差错，向东北通常罢工。差错沿着它在Longling盆，Mangshi盆和Zhefang盆的它的二个方面，以及发展上控制沉积系列和magmatic行动的发展。由于有限第四级的沉积和严厉自然条件，Longling-Ruili差错的北片断上的近来第四级的差错活动正在缺乏的学习和最新的指责的时间并且第四级滑倒率不目前是清楚的。基于遥远的图象的解释，量的geomorphologic变丑大小并且年轻平台存款和冲积扇子，标明日期这份报纸如下获得一些新结果。Longling-Ruili差错的北片断是有正常的某部件的一个Holocene右罢工滑倒差错滑倒。主要在4kaB.P期间形成的冲积存款创作的平台T1。是由Longling-Ruili差错的北片断的偏移量并且它的左侧面并且它的垂直排水量分别地是8m12m和2m。迟了的更新世冲积扇子分别地与70m和18m的左侧面、垂直的排水量被代替。Longling-Ruili差错的罢工滑倒率是2.2mm/a2。5mm/a并且垂直滑倒率是0。6mm/a自从迟了的更新世时代。Longling-Ruili差错的罢工滑倒率是1.8mm/a3.0mm/a并且垂直滑倒率在Holocene时代期间是0.5mm/a。比例对垂直排水量水平是大约4：1，它意味着垂直在Longling-Ruili差错的北片断上滑动率是大约25%水平滑倒率。左侧面在迟了的Holocene滑动率与GPS测量一致。罢工滑倒自从迟了的更新世时代，率具有在不同时间规模的大一致性，显示Longling-Ruili的活动指责稳定性大。

简介：TodeterminethestudyingregionofChinaTestingCenteroftheCollaboratoryfortheStudyofEarthquakePredictability(CSEP),weadoptedtheEntire-Magnitude-Range(EMR)methodtostudythespatialdistributionofminimummagnitudeofcompleteness(MC)intheNorth-SouthTrendingSeismicBelt(NSTSB)duringtheperiodfromOctober1,2008toMay31,2011.AlsobootstraptestingwasperformedtoestimatetheuncertaintyofMC,i.e.δMC.TheresultsshowthatMC(EMR)=1.6±0.03forthewholeregion.FromthespatialdistributionsofMCwefindthatMCisintherangeofML1.3～2.0formostregions.Specifically,thespatialdistributionofMCisconsistentwiththedistributionofstationsindicatinghighmonitoringlevelinthesouthernpartandlowmonitoringlevelinthenorthernpart.EventslocatedwithlessthanthreestationshavegreatinfluenceonMc.Moreover,theuncertaintyofminimummagnitudeofcompletenessδMCrangesfrom0.07to0.22.ThespatialdistributionofδMCagreeswiththeseismicrate.TheshortertimespanmaycauselargerδMC.

简介：Inthispaper,thecorrespondingrelationoftheevolutionarycharacteristicsofgeodeticdeformationfieldswithseismicactivityformorethan20yearsintheNorth-SouthseismiczoneandEastofQinghai-XizangMesshasbeeninvestigated.Notonlyisgeodeticdeformationinnon-homogeneityforthespace-timedistributionbutalsodeformationfieldsareinmacroscopicsimilarityfortheidenticaltimeinterval.Theinheritedtectonicmovementisatotaltendencyofrecentcrustalmovement,andthemotionmodeisinundulations.Therearestagesofaccumulationandrelease-adjustingofstrainenergyincrustalmovementprocesses,whichmaybethedynamicmechanismofrelativelyquietandactiveseismicity.Theanalysisofthecrustalmovementtendencysince1991isofsomesignificanceforjudgingthestressstateandthelargeseismicsituationinthearea.

简介：Inthispaper,usingthe1999~2007GPSvelocityfielddata,andbychoosingtheoptimalblockmodel,weobtainedthedeformationmodelsapplicabletotheboundaryzonesofmajorblocksandtheslipratesofblockboundaryfaultsonthemid-southernsegmentoftheNorth-SouthSeismicBelt.Theresultsshowthat:ontheLongmenshanfaultzone,thetensionalandcompressivesliprateissmallontheBaoxing-Wenchuansegment,about0.5~1.8mm·a-1,andtherateisrelativelysignificantonthesegmentoftheWenchuan-Maoxian,as1.8~3.8mm·a-1;ontheXianshuihefaultbelt,thereisacertaindifferenceinspatialdistributionbetweenthetensionalsliprateandstrike-sliprate:thetensionalsliprate(8.1mm·a-1)isbiggerthanthesinistralstrike-sliprate(4.8mm·a-1)atthenorthoftheLuhuoregion;thetensionandcompressionsliprateisbasicallythesameasthestrike-sliprateatLuhuo-Dawu;theDawu-Kangdingsectionpresentsatrendofdecreasedstrike-sliprateandincreasedtensionalsliprate;theKangding-Shimiansegmentshowsastrike-slipnature;thestrike-sliprateissignificantlygreaterthanthetension/compressionrateontheXiaojiangfaultzone;thesliprateontheRedRiverfaultzoneshowsobviousspatialsegmentation,thesliprateissmallerinitsnorthwestpart,butwithacertainamountoftensional/compressioncomponent,4.7mm·a-1ontheJingdongsegment.ThesegmenteastofJingdong(westernGejiu)ismainlyofstrike-slip,withasliprateof4.5mm·a-1.

简介：Inviewofthecorrelationbetweentectonicactivityandseismicity,thestrongearthquakeriskintheNorth-SouthSeismicBeltarousedwideconcernafterthe2014YutianM_S7.3earthquake.UsingtheseismiccatalogoftheChinaEarthquakeNetworksCenter,theBenioffstrainratiointheNorth-SouthSeismicBeltiscalculatedin30daysbeforeandaftertheMarch21,2008andFebruary12,2014YutianM_S7.3earthquakes.Resultsshowthatinayearafterthe2008YutianM_S7.3earthquake,M>5.0earthquakesalloccurrednearthehighstrainratioareaorthejunctionbetweenthelowandhighstrainratioareas,theactivityofstrongearthquakesobviouslycoincideswiththehighstrainratioarea,whichindicatesthattheseareashaveahigherstresslevel.TheYutianearthquakespromotedthereleaseofsmallearthquakesinthehighstressareas.Thisresearchisofcertainindicatingsignificancetothestudyofsubsequentstrongearthquakesofthisregion.

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简介：Althoughseismicgaptheoryplaysanimportantroleinthemed-andlong-termearthquakeprediction,thepotentialriskofthenon-seismicgapinhistoricalearthquakeruptureareaswillneedtobesimultaneouslytakenintoaccountinthestudyofmed-andlong-termearthquakeprediction,duetothetemporallyclusteringornon-linearbehavioroflargeearthquakerecurrence.Inordertoexploretechnicalmethodswhichcanbebasedonobservationaldata,andidentifyhistoricalearthquakerupturezones(includingtheseismicgapinhistoricalandprehistoricearthquakerupturezones),weselecteighthistoricallargeearthquakerupturezoneswithdifferentelapsedtimesonthemid-northsegmentoftheNorth-SouthSeismicBelttomakequantitativeanalysisonthecharacteristicsofmodernseismicityofthesezonesandpreliminarilyexploretheseismicitymethodfordeterminingtheurgencydegreeofpotentialearthquakehazards.Theresultsmainlyshowthatthepvalue,whichreflectstheattenuationofearthquakesequence,andthea-value,whichreflectstheseismicityrate,arestronglyrelatedtotheelapsedtimeofthelatestearthquakeintherupturezone.However,thecorrespondingrelationshipsinsomeruptureareasarenotclearperhapsduetothecomplexfaultstructureandfaultingbehavior.Theb-value,whichrepresentsthestateoftectonicstressaccumulation,doesnoteasilyreflecttheelapsedtimeinformationofdifferentevolutionstages.Theb-valuetemporalscanningshowsasteadyevolutionovertimeinmostoftherupturezones,butintherupturezoneoftheWuduM8.0earthquakeof1879,theb-valueshowssignificantfluctuationswithadecreasingtrendfor20years.Bycomparativeanalysis,weconcludethattherupturezonesofthe1933M7.5Maoxianearthquakeandthe1976M7.2Songpan-Pingwuearthquakearestillinthedecayingperiodofearthquakesequences,andthusdonothavethebackgroundforrecurrenceofM7.0earthquakes.Thelowb-valueMaqusegment,whichislocatedatthenorthmarginoftherupturezoneof

简介：关于在在中国的纵贯的地震的带和基于地理信息，系统(GIS)被做了的中央orogenic带的连接区域的差错和seismicity之间的关系的研究。为每在这个区域的16个差错，我们造一个25km缓冲区地区和使用覆盖分析在每个差错上调查seismicity和它的特征。结果作为follows:the揭开主要地震差错西方的片断西方Qinling差错，Lixian-Luojiabao差错的西南的片断，Lintan-Dangchang差错的东南的片断，Wenxian差错的西南的片断，Huya差错，和Xueshan差错北边。最活跃的差错是Huya和Xueshan差错，然后，Tazang差错，Lixian-Luojiabao差错和Guanggaishan-Dieshan的北山麓指责。研究地区能根据焦点的深度被划分成四个区域，它向南向北变得更深从到。焦点的深度的侧面显示几何学和差错的机械性质，并且进一步揭示西藏的高原的东方挤出和群众的向东南的逃跑的运动模型，因此在这个区域对地震和危险缓解为保护提供基础。