简介：ＡｐｐｌｉｃａｔｉｏｎｏｆｃｅｒｔａｉｎｔｙｆａｃｔｏｒｓｏｆｅａｒｔｈｑｕａｋｅｐｒｅｃｕｒｓｏｒｙａｎｏｍａｌｙｅｖｉｄｅｎｃｅｓＣＦ（Ｅ）ＺＨＡＯ－ＢＩＺＨＥＮＧ（郑兆），ＪＵＮＺＨＡＮＧ（张军）ａｎｄＭＥＩＱＩＮＧ（庆梅）Ｓｅｉｓｍｏｌｏ...

简介：ＣｅｒｔａｉｎｔｙｆａｃｔｏｒｓｏｆｅａｒｔｈｑｕａｋｅｐｒｅｃｕｒｓｏｒｙａｎｏｍａｌｙｅｖｉｄｅｎｃｅｓＣＦ（Ｅ）Ｚｈａｏ－ＢｉＺＨＥＮＧ（郑兆）（ＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕｏｆＡｎｈｕｉＰｒｏｖｉｎｃｅ，Ｈｅｆｅｉ２３００３１，Ｃｈ...

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(ＭＤ)震源深度(Ｋｍ)震中烈度　地震类型　199203030602228118°10′24°06′118°06′24°12′漳浦海外(厦门南)48Ⅴ孤立型　　表1中宏观震中是根据陆地上勾划的等震线推测的,在微观震中的北西20公里左右。二、地震烈度分布本次地震的波及面很广,闽东南沿海地区均明显有感,调查在Ⅴ、Ⅳ度两个区内进行。由于地震影响场只有一小半在陆地上,勾勒出的是Ⅴ、Ⅳ度两条等震线的半椭圆弧线(见图14-1)。图14-1　1992年3月3日漳浦海外地震等震线图Ⅴ度区:震中位于海上

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：Abrandnewexpertsystemforearthquakeprediction,calledESEP3.0,wassuccessfullydevelopedrecently,inwhichthefuzzytechnologyandneuralnetworkconceptionwereincorporatedandthesteeringinferencemechanismwasintroduced.Inadditiontothefunctionsofsymbolinferenceandexplanationofthefirstgenerationoftheexpertsystemandtheknowledgelearningofthesecondgeneration,ESEP3.0hasstrongerhuman-machineinteractionfunction.Itconsistsofknowledgeedition,machinelearning,steeringfuzzyinferenceengineandsynchronousexplanationsubsystems.Inthispaper,thecomponentsandthegeneraldescriptionofthesystemareintroduced.

简介：BecauseofthesignificancetotheformationandevolutionoftheTibetanplateau,thedisplacementandsliprateoftheAltynTaghfaulthavebeentopicsfullofdisputation.ScientistswhoholddifferentopinionsontheevolutionofTibetinsistondifferentslipratesanddisplacementsofthefaultzone.Inthearticle,studyisfocusedonthelateQuaternarysliprateoftheAltynTaghfaultwestoftheCherchenRiver(between85°Eand85°45'E).OnthebasisofhighresolutionSPOTimagesoftheregion,threesites,namelyKoramlik,AqqanpastureandDalakuansay,werechosenforfieldinvestigation.Tocalculatethesliprateofthefault,displacementofterraceswasmeasuredonSPOTsatelliteimagesorinsituduringfieldworkandthermo-luminescence(TL)datingmethodwasused.Togettheagesofterraces,samplesofsandwerecollectedfromtheuppermostsandbedsthatliejustunderloess.Themethodforcalculatingsliprateoffaultistodividethedisplacementofterracerisersbytheageofitsneighboringlowerterrace.Thedisplacementofriversisnotconsideredinthisarticlebecauseofitsuncertainties.AtKoramlik,thesliprateoftheAltynTaghfaultis11.6±2.6mm/asince6.02±0.47kaB.Pand9.6±2.6mm/asince15.76±1.19kaB.P.AtAqqanpasture,about30kmwestofKoramlik,thesliprateis12.1±1.9mm/asince2.06±0.16kaB.P.AtDalakuansayi,thesliprateofthefaultis12.2±3.0mm/asince4.91±0.39kaB.P.Hence,wegettheaveragesliprateof11.4±2.5mm/aforthewesternpartoftheAltynTaghFaultsinceHolocene.ThisresultisclosetothelatestresultsfromGPSresearch.

简介：分析了2005年11月26日九江-瑞昌地震震害与当地工程场地条件间的关系，结果表明：当地工程地质条件复杂，水平向变化大，软土发育，存在溶洞，是此次地震灾害严重的一个重要原因。灾后重建应开展地震小区划工作，为抗震设防提供科学依据。

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：1地震基本参数地震名称：江西九江-瑞昌5．7级地震发震时间：2005年11月26口08时49分38．6秒震级：Ms=5．7微观震中：29．7°N、115．7°E（中国地震台网测定）震源深度：10km最大余震：主震当日12时55分，震级M1．5．4极震区烈度：Ⅶ度

简介：ThedistributionoftheintensityoftheMojiangMS5.9earthquakeinYunnanProvinceisexpounded,andthedamagecharacteristicsofbuildingsandthedamageratioandseismicdamageindexofvariousbuildingstructuresineachintensityareaarecomparedwiththoseofTheChineseSeismicIntensityScale.Themainbasisandmethodofseismicintensityassessmentarediscussedinthispaper.Itisconcludedthat:①Theseismicintensityshouldbebasedontheearthquakedamageofthehousingstructure,whichtakesupahighratiointheseismicintensityassessment.Itisrecommendedthatseismicintensityisestimatedbycalculatingtheaverageseismicdamageindex.②ThehighestintensityoftheMojiangMS5.9earthquakeisVIIIdegrees,withthelongaxistrendinginthenorth-westdirection.TheareaaboveVIIdegreesis5,180km^2.③TheintensitydistributionoftheMojiangMS5.9earthquakemeetsthenationalstandardandthedistributionlawofseismicintensityinYunnan.

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　198305121504481159°251°11598°2501°武平武溪4212Ⅴ主余震型　　据调查,宏观震中位于微观震中东南12公里处的武平武溪附近。二、地震烈度分布本次地震的有感范围涉及福建、江西、广东三省交界地区,调查工作主要在福建省武平境内进行,江西省境内由江西省地震办协助调查,广东境内用虚线连接。调查中根据人的感觉,结合民房轻微损坏情况,勾划出Ⅴ、Ⅳ度两条等震线(见图9-1)。图9-1　1983年5月21日武平地震等震线图Ⅴ度区

简介：

简介：Theconventionalpseudo-staticapproachoftenneglectstheeffectoftheverticalseismicaccelerationonthestabilityofaslope,butsomeanalysesunderplane-strain(2D)conditionsshowasignificanteffectontheslopestability.Thepurposeofthisstudyistoinvestigatetheeffectoftheverticalaccelerationonthesafetyofthree-dimensional(3D)slopes.Inthestrictframeworkoflimitanalysis,a3Dkinematicallyadmissiblerotationalfailuremechanismisadoptedherefor3Dhomogeneousslopesinfrictional/cohesivesoils.Asetofstabilitychartsispresentedinawiderangeofparametersfor3Dslopesundercombinedhorizontalandverticalseismicloadingconditions.Accountingfortheeffectsoftheverticalseismicacceleration,thedifferenceinsafetyfactorsfor3Dslopescanexceed10%,whichwillsignificantlyoverestimatethesafetyofthe3Dslopes.

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　199705311451117°11′25°35′117°11′25°34′永安西南526Ⅵ前主余震型　　宏观震中与微观震中基本吻合,稍偏南1分。二、地震烈度分布本次地震震中位于永安市小陶镇张家山一带,震中烈度Ⅵ度强。Ⅵ度区:为极震区。Ⅵ度等震线北起永安市小陶镇大陶村,东至漳平市的赤水镇,南经龙岩市新罗区万安镇的安前村,西到连城县曲溪镇的古白石村,呈长轴北东走向的准椭圆形。长轴长38公里,短轴宽24公里,面积约700平方公里(见图23-1)。

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　199405241917381172°256°1171°256°永安小陶4514Ⅴ震群型　　宏观震中位于微观震中的西偏北约9公里处连城县赖源乡的李八坑与东坑垅之间。二、地震烈度分布宏观调查主要在Ⅴ度及Ⅳ度两区内进行,Ⅲ度等震线仅靠电话了解确定,图18-1为本次地震的等震线图。图18-1　1994年5月24日永安小陶地震等震线图Ⅴ度区:本次地震极震区。Ⅴ度等震线经过永安市小陶的小吴地、北山、坚村、美坂,连城县赖源的新亭、南山顶,龙岩市万安乡的松

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　9985200707119°18′24°49′惠安海外4811Ⅴ主余震型　　地震发生于海域,离震中最近的惠安小山乍,距离约36公里。故宏观震中无考,震中烈度亦为推测的。二、地震烈度分布本次地震的现场调查工作,由莆田市、泉州市、南安市及惠安县等地震局(办)分开进行,各自提交有关调查报告。经过汇总及电话核查,给出本次地震的烈度分布图(图25-1)。其中Ⅳ度区是根据现场考察确定的,Ⅲ度线则是采取控制点电话调查的办法勾划的。图25-1　1999年8月

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：M_s6.8地震在Xinjiang.Themacroseismic在Wuqia区域发生在10月5,2008日震中位于Kyrghyz共和国的Nula村庄，在Xinjiang.The震中紧张的WuqiaYierkeshitan港口的7km西南是度(外面的边阶)紧张的.The区域并且是7354km2和1031km2，respectively.This地震事件在earthquake.stricken区域与趋势NEKzikeaerkate差错belt.Buildings的运动被联系被损坏或影响到某个exte

简介：ThispapercalculatesthestaticCoulombstresschangesgeneratedbyfourearthquakesintheYutianareaduring2008~2014separately,thendiscussesthetriggeringinfluence,theiraccumulatedCoulombstresschangesandtheirinfluenceonnearbyfaults.TheresultsindicatethattheMS5.5earthquakein2011andtheM_S7.3earthquakein2014arebothintheregionswheretheCoulombstresschangeispositive,thestresschangesare0.004MPaand0.021MPa,respectively,meaningtheyaretriggeredbypriorearthquakes.TheMS6.2earthquakein2012occurredintheplacewhereCoulombstresschangewasnegative,soitispostponedbythepriorearthquakes.TheimageofCoulombstresschangesoftheMS7.3earthquakein2014isinaccordwithaftershocks(ML≥3.0)distribution,butsomeregionsonthefaultwheretheCoulombstresschangeispositivehavefewaftershocks,andstrongaftershocksmayoccuratthesedistrictsinfuture.Inaddition,thispapercalculatestheCoulombstresschangeonnearbyfaults,andfindsthattheCoulombstresschangesofdifferentelementsintheGGCfaultareverydifferent,andmustreceivestrongtriggered-influence,thoughtheresultmaybeinfluencedbytheinputfinitefaultmodel,sothereisstillalargeearthquake-risk.TheGGN,PLC,PLWandLBWfaultswerealsotriggeredbythefourearthquakesoccurringbetween2008~2014.TheirmaximumCoulombstresschangesallexceed0.002MPa,sotheyalsohaveastrongearthquakehazard.