简介：ＳｅｉｓｍｉｃａｎｉｓｏｔｒｏｐｙｂｅｎｅａｔｈＳｏｕｔｈｅｒｎＴｉｂｅｔＱＩＮＧ－ＴＩＡＮＬＵＩ（吕庆田），ＫＡＩ－ＹＩＭＡ（马开义），ＭＥＩＪＩＡＮＧ＇（姜枚），Ａ．ＨｉｒｎａｎｄＡ．Ｎｅｒｃｅｓｓｉａｎ（ＩｎｓｔｉｔｕｔｅｏｆＭｉｎｅｒａｌＤｅ...

简介：基于在在中国，关于为在中央南部的湖南省设计地点的地震安全评价的最近的研究，中等地震的新变细关系和自从1970，seismicity数据由现代仪器的地震记录获得了的背景编地震地面运动参数的带状配列地图使用的基本数据，中央南部的湖南省的地震带状配列的新结果被提供。有针网阵列=0.05g的区域显然与以前的那个相比在新地图增加了并且与在最近的years.This结果发生在湖南的中央南部的部分的中等地震的地震灾难特征相对一致的结果表演将有益于研究和编译一新产生在中等地震的地震地面运动参数和地震危险评价的地震带状配列地图活跃区域在中央一

简介：从地区性的网络基于地震数据最后34年，我们在Mabian区域附近分析了主要差错地区的现在的差错行为，南部的四川，并且鉴别为在分析的future.The方法的潜在的强烈、大的地震的危险差错片断是有历史的强烈地震的活动背景的b值的空间分发的联合，当前的seismicity.Our结果主要出现:(1)b值的空间分发显示重要h

简介：TheYuguangbasinisahalf-grabenbasininthebasin-rangetectoniczoneinnorthwestBeijing,locatedatthenorthernendoftheShanxigrabensystem,andtheYuguangbasinsouthernmarginalfault(YBSMF)controlstheformationofthisbasin.AlinearfaultescarpmenthasformedintheproluvialfanonthepiedmontfaultzoneoftheTangshankousegmentofYBSMF.Atrenchacrossthisescarpmentrevealsthreepaleo-earthquakeeventsontwoactivefaults.Onefaultrupturedatabout9kaforthefirsttime,andthenfaultedagainatabout7.3ka,causingtheformationandsynchronousactivityofanotherfault.Finally,theyfaultedforthethirdtime,butwecannotdeterminethefaultingtimeduetothelackofrelevantsurfacedeposition.Theaccumulativeverticaldisplacementofthesethreeeventsisabout8.1m.Weestimatethattheaveragerecurrenceperiodofthepiedmontfaultisabout1.7ka,andtheaveragesliprateofthepiedmontfaultisabout1.6mm/a.Wealsoestimatethereferencemagnitudeofeacheventaccordingtotheempiricalformula.

简介：ThecharacteristicsofseismicgroundmotionsinsouthernChinaaredifficulttodeterminestatisticallyduetoalackofstronggroundmotiondata.Inthisstudy,astochasticfinite-faultgroundmotionmodelwasadoptedtosimulatetheseismicgroundmotionsatbedrockforsouthernChina,basedonparametersderivedfromsmallandmediumearthquakesthathaveoccurredintheregion.Fromthese,theresponsespectrawasestimated.Asetofgroundmotionattenuationrelationshipswasthendevelopedbasedonsimulatedpeakgroundmotionsandresponsespectralparametersthroughregression,whichwouldbeapplicableforuseinengineeringpractice.Throughcomparisons,itwasdemonstratedthattheproposedgroundmotionrelationshipsaregenerallyconsistentwiththoseobtainedfromotherreportedgroundmotionattenuationmodelsforsouthernChina.

简介：OnJune22,1518,alargeearthquake,measuringM71/2,occurredoffshorewestofSeoul,KoreainthesouthernYellowSea.ThisearthquakeaffectedthewholeKoreanPeninsula,andcauseddamagetothecoastalareassuchasSeoul,wheretheseismicintensitywasdegreeⅧ.Aftershockactivitylastedformorethanonemonth.TheearthquakealsoaffectedtheEasternChinaregion.ThisearthquakewaspossiblyrelatedtotheactivityofthewesternmarginfaultzoneoftheKoreanPeninsula(theeasternmarginfaultzoneofthesouthernYellowSea).Theepicenteroftheearthquakewaslocated36.5°Nand125.2°E.

简介：UsingpureSwavefittingmethod,westudiedtheshearwavevelocitystructuresundertheOrdosblockanditseasternandsouthernmarginalareas.TheresultsshowthatthevelocitystructurebeneathYulinstationintheinteriorofOrdosblockisrelativelystable,wherenoapparentchangebetweenhighandlowvelocitylayersexistsandtheshearwavevelocityincreasessteadilywiththedepth.Thereisa12kmthicklayeratthedepthof25kmunderthisstation,withanSwavevelocity(Vs=3.90km/s)lowerthanthatatthesamedepthinitseasternandsouthernareas(Vs≥4.00km/s).ThecrustundertheeasternmarginofOrdosblockisthickerthanthatoftheYulinstation,andthevelocitystructuresalternatebetweenthehighandIowvelocitylayers,withmorelowvelocitylayers.Ithasthesamecharacteristicashavinga10km-thicklowvelocitylayer(Vs=3.80km/s)inthelowercrustbutburiedatadepthofabout35km.Moreover,westudiedtheVi/VsratioundereachstationincombinationwiththeresultofPwavevelocityinversion.Theresultsshowthat,theaveragevelocityratiooftheYulinstationattheinteriorofOrdosblockisonly1.68,withaverylowratio(about1.60)intheuppercrustandastableratioofabout1.73inthemidandlowercrust,whichindicatesthemediaunderthisstationishomogenousandstable,beinginastateofrigidity.ButatthestationsintheeasternandsouthernmarginsoftheOrdosblock,severallayersofhighvelocityratio(about1.80)havebeenfound,inwhichtheaveragevelocityratiounderKelanandLishistationsattheeasternmarginissystemicallyhigherthanthatofthegeneralelasticalbodywaves(1.732).Thisreflectsthatthecrustunderthemarginalareasismoreactiverelatively,andothermaterialsmayexistintheselayers.Finally,wediscussedtherelationshipamongearthquakes,velocitystructuresbeneathstationsandfaults.

简介：WecompilearegionalcatalogueofearthquakeswithmomentmagnitudeoftheCenter-SouthernAsiatestarea(20°-35°N,85°-105°E)fortheGlobalSeismicHazardAssessmentProgram(GSHAP).Therearesignificantinhomogeneousanduncompleteddata,andnuniformityofearthquakemagnitudesinthistestareabecausethisregionissituatedontheboundariesofmanycountries,suchasChina,India,Nepal,Vietnam,etc.WeestablisharelationshipbetweenGutenbergsurface-wavemagnitudeandIASPEIsurface-wavemagnitude,whichcanbeusedforconversionofdifferentmagnitudescalesintomomentmagnitudeforthiscatalogue.AcatalogueofeventswithMw≥6.0ofthistestareaisgivenattheendofthispaper.

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：Basedonthemodelsofnon-uniformearthquakedistributioninthepotentialsource,theseismiczonationofWesternPanzhihuaandCentralandSouthernShanxiProvinceisstudied.Theresultsshowthattheusualuniformdistributionmodelmayunderestimatetheseismicriskandresultinareductionoftheareasofhighintensity.Theinfluenceofeachnon-uniformprobabilisticdistributionmethodontheresultofseismiczoningisdiscussed.

简介：TakingthesouthernpartoftheShanxiProvinceandthewesternpartoftheSichuanProvinceastheexamples,theseismicityparametersofeverypotentialseismiczonehavebeendeterminedbythemaximumlikelihoodmodelwithdifferentdatabasedondifferentmagnitudethresholds,dependingonthedifferentprecisionofdifferentearthquakecatalogs.Accordingtothegeneralseismicriskanalysismodel,theseismicintensityzoningfortwoareashasbeenobtained.

简介：［ＢｒｉｅｆＮｅｗｓ］：ＡｎＭｓ＝７．３ｅａｒｔｈｑｕａｋｅｏｃｃｕｒｒｅｄｉｎｔｈｅｓｏｕｔｈｅｒｎＡｎＭｓ＝７．３ｅａｒｔｈｑｕａｋｅｏｃｃｕｒｒｅｄｉｎｔｈｅｓｏｕｔｈｅｒｎｐａｒｔｏｆｔｈｅＴａｉｗａｎＳｔｒａｉｔ（２２．６°Ｎ，１１８．７°...