简介：AnearthquakewithM7.1occurredinYushu,QinghaiProvince,China,at07:49a.m.onApril14,2010,accordingtotheChineseSeismicStationNetwork.Thesequenceisafore-mainafter-shocktypesequence.AforeshockwithM4.7occurred2hoursand11minutesbeforethemainshock.Therewere12foreshocksand2385aftershocksuntilJune31,2010.Inwhich,thereare21aftershocksbetweenM3.0andM3.

简介：枚举的算法被介绍了进ASR模型的恰当的过程。与M6基于21大地震的详细学习。8在中国大陆，在大地震前的地震紧张版本的统计特征被总结了。在团中，紧张版本模型能被划分成五种类型。第一是DA模型，紧张版本在更宽广的区域在加速并且在震中附近在小区域速度。约38%地震样品具有这种类型。第二是AD模型，紧张版本在更宽广的区域在速度并且与占据ratioof在震中附近在更小的区域加速约19%。第三是ASR，仅仅加速的紧张版本能在被观察。这个模型的盒子等于大约14%。第四是数据设置就绪，仅仅速度的紧张版本能在被检查，等于大约24%。仅仅有第五种类型(LSR)的一件地震样品，它显示出一个线性紧张版本。在持续时间有36年差别预先震惊在加速并且速度的模型之间的序列。在大地震一般来说是一个典型特征以前，这对小地震的增加的seismicity的一个背景意味着那地震静止。为DA模型，分别地，为稳定的加速并且速度的紧张版本的批评区域的平均尺寸关于到400km和100km的260km到200km3～5次，1～2预定大小7的地震的破裂尺寸。0。广告模型是DA模型的反面。模型参数，m价值，好稳定性。ASR的比率关于为加速地震紧张版本现象的一样，不管紧张版本模型是什么，或紧张版本数量怎么大。关于速度地震紧张版本现象，DA模型有最特殊的速度紧张版本特征并且是地震紧张版本的典型特征，我。e。“速度在里面加速外面地震紧张模型”。

简介：公元1590年7月，在甘肃临洮附近有破坏性历史地震记载“……坏城廓庐舍，压死人畜无算”。同月，青海东部的冰沟城（今乐都县东北）也因地震而城崩。在过去出版的地震目录中，均按两次地震列出，分别称为甘肃临洮5Y2级地震，震中烈度Ⅶ度：青海乐都5级地震，震中烈度Ⅵ度。根据史料考证和现场调查结果，综合分析认为，上述两次地震很有可能为同一次地震，其震中位于甘肃永靖东南的马衔山区，震中烈度达Ⅷ一Ⅸ度，震级6V2级左右，其发震构造很可能为兰州马衔山北缘断裂带的中西段。

简介：Completerecordsofmorethan3,000earthquakeeventsintheShanxi,WenzhoureservoirearthquakesequencewererecordedfromAugusttoNovember,2014bythehigh-density,high-resolutionmonitoringstationsoftheZhejiangRegionalDigitalSeismicNetworkandthereservoirearthquakemonitoringnetwork,withamaximummagnitudeofM4.2.Basedon3-Depicenterlocation,focalmechanismsolutions,andincombinationwiththegeologicalandtectoniccharacteristicsofthereservoirarea,theearthquakesequenceisdiscussedinthispaper.ThelinearfittingoftheHypoSATlocationresultsshowthatthemainshockoccurredintheNWtrendingfaultandtheearthquakesequenceisconcentratedinbandsalongtheactivefaults,withastrikeof305°,dippingSWwithdipangleof85°.ByusingP-wavefirstmotionsymbols,weobtainedtheaveragefocalmechanismofM≥3.5earthquakes,withastrike308°anddip84°fornodalplaneII.Thefieldgeologicalsurveyandresearchshowthatthestrike,dipandrakeofnodalplaneIIareroughlyconsistentwiththeoccurrenceoftheShuangxi-Jiaoxifault.ThecomprehensiveanalysisrevealsthattheNW-trendingShuangxi-Jiaoxifaultistheseismogenicstructureoftheearthquakes.

简介：ＰｒｏｃｅｓｓｏｆｓｏｕｒｃｅｄｙｎａｍｉｃｓｏｆｔｈｅＪｉｎｇｔａｉｅａｒｔｈｑｕａｋｅ（Ｍ＝６．２）Ｘｕｅ－ＢｉｎＤＵ（杜学彬）；Ｚｈｉ－ＤｅＹＡＮ（闫志德）ａｎｄＭｉｎｇ－ＷｕＺＯＵ（邹明武）（ＥａｒｔｈｑｕａｋｅＲｅｓｅａｒｃｈＩｎｓｔｉｔｕ...

简介：Therehavebeen12possiblelocationsoftheearthquakesoccurringintheSouthYellowSeasince1505.Inthispaper,thelocationoftheearthquakethatoccurredin1505hasbeendeterminedbythecollectionofmorehistoricaldataoftheinfluencedfield,referringtheisoseismaldataofearthquakeswiththeepicentralintensityⅨandcombininggeophysicalfielddatawithtectoniccondition,duetoitsgreatinfluenceonseismicsafetyassessmentofsomesignificantengineering.

简介：通过云南M≥7．6级地震震亡分布的统计，研究大地震的伤亡分布规律，寻找影响伤亡的主要原因。结果表明，震亡人数主要分布在Ⅷ度以上烈度区，这一区域的震亡人数占震亡总数的94％以上，其中极震区占到70％以上。调查分析认为：在震级相近的情况下，震区地质构造、地形地貌是影响地震烈度的因素；房屋、人口密度、发震时间是震亡人数的重要影响因素；在未来的大地震中，人口密度大的断裂带及其附近是应急救援和医疗救护的重点区域，在断裂带及其附近盆地内的震亡人数比非盆地震亡人数多，要投入更多的救援和医疗救护力量。

简介：Thispaperisthesecondinatwo-partseriesthatdiscussestheprincipalaxesofM-DOFstructuressubjectedtostaticanddynamicloads.Theprimarypurposeofthisseriesistounderstandthemagnitudeofthedynamicresponseofstructurestoenablebetterdesignofstructuresandresponsemodificationdevices/systems.Underidealizeddesignconditions,thestructuralresponsesareobtainedbyusingsingledirectioninputgroundmotionsinthedirectionoftheintendedresponsemodificationdevices/systems,andbyassumingthattheresponsesofthestructureisdecoupleableinthreemutuallyperpendiculardirections.Thisstandardpracticehasbeenappliedtobothnewandretrofittedstructuresusingvariousseismicprotectivesystems.Verylimitedinformationisavailableontheeffectsofneglectingtheimpactofdirectionalcouplings(crosseffectsofwhichtorsionisacomponent)ofthedynamicresponseofstructures.Inordertoquantifysucheffects,itisnecessarytoexaminetheprincipalaxesofstructuresunderbothstaticanddynamicloading.Inthistwo-partseries,thefirstpaperisconcernedwithstaticloading,whichprovidesdefinitionsandfundamentalformulations,withtheconclusionthatcrosseffectsofastaticallyloadedM-DOFstructureresultingfromthelackofprincipalaxesareofinsignificantmagnitude.However,underdynamicorearthquakeloading,arelativelysmallamountofenergytransferredacrossperpendiculardirectionsisaccumulated,whichmayresultinsignificantenlargementofthestructuralresponse.ThispaperdealswithaformulationtodefinetheprincipalaxesofM-DOFstructuresunderdynamicloadinganddevelopsquantitativemeasurestoidentifycrosseffectsresultingfromthenon-existenceofprincipalaxes.

简介：Ｔｈｅ　ａｎａｌｙｓｉｓ　ｏｆ　ｄｉｓｋ　ｃｏｒｅ　ｆｒｏｍ　ｔｈｅ　Ｍａｏｐｉｎｇ　８００　ｍ　ｂｏｒｅ　ｈｏｌｅ（阮小平）（李方全）ＴｈｅａｎａｌｙｓｉｓｏｆｄｉｓｋｃｏｒｅｆｒｏｍｔｈｅＭａｏｐｉｎｇ８００ｍｂｏｒｅｈｏｌｅ￥Ｘｉａｏ－Ｐｉｎｇ...

简介：本文根据地震现场的考查情况，介绍了2006年7月22日云南盐津5．1级地震的灾害概况，归纳和分析了灾区生土墙结构、石结构、钢筋混凝土框架结构和木构架结构房屋的震害特征及其破坏原因，并对我国村镇房屋的防震减灾研究提出了若干建议。

简介：AnM8.1earthquakethatoccurredwestoftheKunlunMountainsPasshascausedmorethan20collapsebodiesorzones,whicharemainlydistributednearthesurfaceseismicrupturezone,westofHohSaiLake.Thecollapsesareoffourtypes,bedrock,soilmassandicemasscollapsesandavalanches.Thespatialdistributionandthecharacteristicsofdevelopmentofthecollapsesareanalyzedinthepaper.Comparisedwiththosecausedbyotherearthquakes,thecollapsesaresmallerinscale.Inadditiontothelithologicalcharacteristicsofthecrustalmedia,topographic,geomorphicandclimaticfactors,weakerseismicgroundmotionisanimportantcauseforformationofthesmaller-scalecollapses.Thelongsurfacerupturezoneandweakergroundmotionareimportantfeaturesoftheseismicrupture,whichmayberelatedtothestructureofthepreexistingfault.

简介：1861M6。0地震发生在Pulandian的东方是有M6的另一强烈地震。0除1975HaichengMT以外。在Liaodong半岛的3地震。通过重复调查，1861地震的震中在Gupao被定位，Pulandian的村庄东方。基于损坏调查和现代仪器的地震数据，这项活动和Jinzhou差错，Pulandian海湾差错和趋势NW的地震风险的精确地点的分析Pulandian差错被分析。并且由比较在Pulandian和Haicheng之间的深seismogenic环境，，它被发现那neogenic活跃差错，趋势NW差错，与Jinzhou差错结合了，有更高地震的风险。趋势NW差错是1861M6的seismogenic结构。0地震。并且作为在Liaodong半岛的一个主要差错，Jinzhou差错控制了这个区域的seismicity。Pulandian海湾差错是相对不活跃的，与弱seismicity，并且对地震无关。

简介：ＡｓｏｕｒｃｅｅｘｔｅｎｔａｎａｌｙｓｉｓｏｆｔｈｅＬａｎｃａｎｇｅａｒｔｈｑｕａｋｅ（Ｍｓ＝７．６）ｏｆ１９８８ＳＩ－ＨＵＡＺＨＥＮＧ（郑斯华）ＪＩＡＮＹＡＮＧ（杨健）ＣｅｎｔｅｒｆｏｒＡｎａｌｙｓｉｓａｎｄｐｒｅｄｉｃｔｉｏｎ，ＣｈｉｎａＳｅｉｓ...

简介：

简介：本文以三维空间角度，从菏泽地震的地震构造环境、构造应力场、震源闭锁形式和地震玻裂机制等方面探讨了菏泽地震的成因。提出了断裂空间交汇闭锁模式和共轭破裂发震机制，分析了菏泽地震发生在聊考断裂的东侧、濮阳——开封上地幔隆起东翼的原因。

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：TheseismicwaveformoftheYutianMS7.3earthquake,XinjiangonFebruary12,2014wasrecordedclearlyandcompletelybytheDigitalSeismicNetworksofXinjiang,Qinghai,Tibet,andXinjiangHotanarray,sothemethodofjointlocationbyregionalseismicnetworkandseismicarraycanbeusedtoaccuratelydeterminetheearthquakesourcelocation.Thefollowingtechnologieswereusedintheprocessoflocation:(1)WeselectedseismicstationsequallylocatedaroundtheepicenteroftheMS7.3earthquakewithanaverageintervalofabout15degreesintheinitiallocation.(2)TherecordingwaveformsofYutianseismicstationwererotatedtotheradialandtangentialdirectionstopreciselyobtainthearrivaltimeofS-wavestodeterminetheepicentraldistance.(3)Thevelocitymodelwasusedinthedeterminationoflocationoftheepicenter,basedonthehistoricalrecordsofearthquakesintheareawithinaradiusof1.0°fromthesourceasthecenter,andthevelocitymodelisobtainedafterre-fittingandcalibration.(4)BasedonthewaveformrecordsoftheHotanseismicarray,themethodofwaveformbeamingwasusedtodeterminetheazimuthsandperformthecorrectionoftheepicenterlocationwiththeseazimuths.(5)Thedeterministicmethodwasusedtomeasurethesourcedepth.Finally,itisconcludedthattheYutianMS7.3mainshockhypocenterlocationis36.197°N,82.467°E,focaldepth12kmandoriginaltime17:19:48.2p.m.February12,2014.

简介：DetailedexaminationofhistoricaldataofearthquakesandfieldinvestigationsofloesslandslidecausedbytheearthquakeandtracingofactivefaultsinLanzhouareaindicatethattheYijitanputown,oneofsixtownsofJinchengcity,wasdevastatedbythe1125Lanzhouearthquake.ThecitlyisnowlocatedintheVinylonFactorysouthofHekou(RiverMouth)intheXigudistictofLanzhoucity.WedelerminedthatthesixoldtownsmentionedinhistoricalrecordslieinanareastretchingfromthesouthofXigudistricttoHekouinLanzhou.Thisisconsistentwiththedistibutionofloesslandslidescausedbytheearthquake,theextensionofHoloceneactivefaults,andthedistributionoftracesoftheseismicrupturezone.Acomprehensiveanalysisshowsthattheseismogenicstructureforthe1125LanzhouM7.0earthquakeshouldbetheXianshuigoufaultsegmentatthewesternterminationofthenorth-borderactivefaultzoneoftheMaxianshanMountainswhicharelocatedinsouthofLanzhoucitywiththedistanceofonly4km.

简介：Ｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｆａｕｌｔｓａｎｄｇｅｎｅｒａｔｉｏｎｏｆｉｎｌａｎｄｓｈａｌｌｏｗｅａｒｔｈｑｕａｋｅｓ：ｅｎｌｉｇｈｔｅｎ－ｍｅｎｔｏｆｔｈｅＭ＝７．２ｓｏｕｔｈｅｒｎＨｙｏｇｏｐｒｅｆｅｃ－ｔｕｒｅｅａｒｔｈｑｕａｋｅＴＯ...

简介：Amoredetailedanddeep-goinganalysisoftectonicconditionsforthe1989BohaiSeaM7.4earthquakeareahasbeenmadebasedonthedataofoilgeologicalexplorationandresultsofseismologicalresearches.TheobtainedresultfillsthegapinseismotectoulcresearchofLargeBohaiSeaearthquakeareaofNorthChina.TheearthquakeareaislocatedintheeasternpartofCenozoicriftedbasinoftheBohaiGulf,alongtheintersectionzonebetweentheNNE-trendingYingkou-WeifangfaultzoneandtheNW-trendingBeijing-Penglaifaultzone.IntheearlyTertiaryfault-depressionstage,threesetsoffaults,theNNE-,NW-,andW-E-trendingfaults,weredevelopedintheuppercrustinthearea.Theyarelistricandplanarintheform,ofnormalfaultcharacterandmostlythemajorfaultsinfaulteddepressions.Inthefault-depressionstagesincelateTertiary,thepreexistingfaultshaveundergonemovementtodifferentextent.Meanwhile,anewNE-trendingHuanghekou(YellowRiverMouth)-Miaoxibeifaultzonewasdeveloped.ThefocalfaultingoftheM7.4earthquake,strikingtoN45°EanddippingtoSE,isnearlyvertical,withdextralstrike-slipnature,andburieddowntodepthof15～34km.TheseismogenicfaultforthelargeearthquakeisnottheYingweifault,butthenewlygeneratedHuanghekou-Miaoxibeifault.