简介：ＴｈｅＤａｔｏｎｇｅａｒｔｈｑｕａｋｅａｎｄｉｔｓａｎｏｍａｌｏｕｓｔｉｌｔｆｉｅｌｄＡｎ－ＦｕＮＩＵ（牛安福）；Ｙｉ－ＬｉｎＷＵ（吴翼麟）；Ｄｅ－ＦｕＣＨＥＮ（陈德福）ａｎｄＸｉａｏ－ＪｕｎＬＩ（李晓军）（ＩｎｓｔｉｔｕｔｅｏｆＳｅｉｓｍｏｌｏｇｙ...

简介：TheemergenceofZhangHeng’sseismoscopehasaprofoundhistoricalbackground.ThispaperintendstoexploretheformationandmaterialbasisofZhangHeng’sscientificthought.Itappearsthatthesimpleintentionof"observingvisionsanddistinguishinggoodfortuneormisfortune"washismotivationtodeveloptheseismoscope.Tracingitshistoricalbackground,theauthorsproposedinthispaperthatthedevelopmentofthisseismoscopestartedaround128A.D.,andbasedonperceptualknowledge,twoideasaboutearthquakescameintobeing,i.e.,earthquakelocationcouldbejudgedaccordingtotheinstrumentshakingdirection,andtheearthquakeandearthsplitwereessentiallydifferent.Intheinstrumentmanufacture,ZhangHengadvocatedaprincipleof"makingutensilstoimitatecosmos".Bythisprinciple,thefollowingthreeproblemswerereadilysolved:theseismoscopeimitatedtheresponseofthesuspensionsystemtoearthquakes(i.e.naturalseismoscope).Technically,thetriggermechanismofthelatchwasusedforreference,anditrecordedthephysicalevidenceofearthquakeoccurrencebyaningeniouswayofaballdroppingfromadragon’smouth.Thesolutionofthesethreekeyproblemsleadtotheemergenceoftheseismoscopein132A.D.andthesuccessfuldetectionofanearthquakein134A.D.Hisinventiondeepenedhumanity’sknowledgeofnaturallaws,andpromotedthedevelopmentofscienceandtechnologyinthattimeandlater.

简介：Monitoringandstudyofdynamiccharacteristicsofgroundwateraresignificantmethodsofearthquakemonitoringandforecasting.Forresearchongroundwaterdynamics,groundwaterdatingcanqualitativelyandquantitativelyprovidescientificanalysisonthecharacteristicsofgroundwaterrechargeandrunoffaswellasrenewalcapacity.Thisarticleillustratesthemethodsusedgloballyandsummarizesthemainadvancesandachievementsingroundwaterdating.Italsofocusesontherelationshipsbetweengroundwaterrenewalcapacityandseismicmonitoring,groundwatermovementandseismicactivity,shallowgroundwaterrechargeandabnormalinterferenceelimination.Thestudiesshowthatgroundwaterdatingplaysanimportantroleinwater-rockinteraction,andgeologicaltectonicandseismicactivityevaluation.Therefore,groundwaterdatingcanbewidelyusedtomonitorandanalyzetheprecursorinformationinseismicundergroundfluidobservationsinthenearfuture.

简介：Inthispaper,wefirstlyanalyzethe"3,400traveltimetable"usedforalongtimeinXinjiangSeismologicalNetworktoobtainthevelocitystructuremodelsinaccordwiththetablebyfitting.ThenwefitthevelocityofallseismicphasesrecordedinXinjiangregioninJanuary2009~December2013.Simulationanalysisisdoneonthereliabilityandstabilityofthevelocities,andaconceptisproposedforbuildingsubareacrustalvelocitymodelsaccordingtopartitioningofseismicclusterregions.ThecrustalvelocitymodelsuitablefortheYutianareaisfittedwiththedataofallphasesofseismiceventswithinaradiusof1°aroundthe2014YutianM_S7.3earthquakesinceJanuary2009,andthemodelisappliedtotherelocationoftheYutianM_S7.3earthquakeanddeterminationoffocaldepthsoftheearthquakesequence.

简介：ThispaperbrieflyintroducestheSeismotectonicMapofXinjianganditsneighborhoodinthescaleof1∶2500000.Themapisamended,supplementedandexpandedbasedofthenewlycompiledSeismotectonicMapofXinjianginscale1∶1000000.ThebasemapofthisseismotectonicmapisthegeologicmapofwesternChinaanditsneighborhoodcompiledbyLiTingdong.Theabundantnewmaterialsfromrelatedresearch,referentialliteraturesandtheanalysesonremotesensingdatawereusedinthecompilingwork.Adatabaseandrelevantdocumentsarebuiltfornearly300activefaultsand150activefolds.Thebasicinformationofthemajoractivefaults,especiallythoseneartheborderareasinthismapareintroducedinthispaper.

简介：Asaresultofsortingout,estimatingandcatalogingofhistoricalearthquakes,fromtheyearof2A.D.toAug.,1949,wefoundthattherewere2187earthquakeswithM≥3.0intheareaoftheYellowSeaanditsadjacentarea.Amongtheearthquakes,thenumberofearthquakeswithM≥5.0is209,andatleast43oftheearthquakescausedseriouslosses,20oftheearthquakescausedhumancausalities.Itisdemonstratedthattherewere3areasofhistoricalearthquakeconcentrationandtheearthquakeactivitywashigherinthe16thcenturyandthefirsthalfifthe20thcentury.

简介：Crossholeultrasonictomographyisreferredtoraytracingbygridingmethodandimagereconstructionbycombiningthesuccessivelylinearizediterationwithdampingleast-squaresQRdecomposition,withwhichtheresulthasbetterprecisionthanthatwithcrossholeseismictomographybyusingthesameinversionmethodinengineeringgeologicalinvestigation.Ithasbeenprovedinpracticethattheinvestigationwithcrossholeultrasonictomographycanclearlyshowthelocationandshapeoftheabnormalgeologicalunitwiththevolumemorethan60cmwhenthecrossholedistanceexceeds30m.Theresultofinvestigationhasbeenconfirmedbythedrilling.Thecrossholeultrasonictomographymethodwillbeextensivelyusedintheengineeringgeologicalinvestigation.

简介：Objectivesofthistaskaretoconductresearchonseismichazards,andtoproviderelevantinputontheexpectedlevelsofthesehazardstoothertasks.Othertasksrequiringthisinputincludethosedealingwithinventory,fragilitycurves,rehabilitationstrategiesanddemonstrationprojects.Thecorrespondinginputisprovidedinvariousformatsdependingontheintendeduse:aspeakgroundmotionparametersand/orresponsespectralvaluesforagivenmagnitude,epicentraldistanceandsiteconditions;orastimehistoriesforscenarioearthquakesthatareselectedbasedonthedisaggregatedseismichazardmappedbytheU.S.GeologicalSurveyandareincorporatedinbuildingcodes.Theusercommunityforthisresearchisbothacademicresearchersandpracticingengineerswhomayusetheseismicinputgeneratedbythesynthesistechniquesthataredevelopedunderthistaskforavarietyofapplications.Theseincludegroundmotionsforscenarioearthquakes,fordevelopingfragilitycurvesandinspecifyinggroundmotioninputforcriticalfacilities(suchashospitals)locatedintheeasternU.S.

简介：ＣａｌｃｕｌａｔｉｏｎｏｆｂｖａｌｕｅａｎｄｉｔｓａｐｐｌｉｃａｔｉｏｎｉｎｅａｒｔｈｑｕａｋｅｐｒｅｄｉｃｔｉｏｎＨｕａ－ＣｈｅｎＤＵＡＮ（段华琛）；Ｃｈａｎｇ－ＱｉｎｇＦＡＮ（范长青）ａｎｄＹｕｅ－ＭｉｎＸＵ（许跃敏）（Ｓｅｉｓｍｏｌｏｇｉｃａｌ...

简介：Thispaperselectstherecordsof7,412earthquakes,eachrecordedbymorethan10stationsinYunnanbetween2009and2014toacquirethetraveltimecurves.Meanwhile,forimprovingprecision,linearanalysis,reducedtraveltimecurveandintervalstabilityanalysisareconductedfocusingontherecordsof83earthquakeswithML≥3.0recordedeachby≥80%ofthestations,andbycombiningpredecessors??researchresults,theinitialcrustalvelocitymodelofthestudyareaisobtained.Byselecting200earthquakeswithM≥3.0occurringinYunnanbetween2010and2014,usingtheHyposatbatchlocationprocessingmethodtoiteratetheinitialvelocitymodel,andperformingfittingtoSwaveslayeredvelocitystructure,weobtainthecrustalvelocitymodelfortheYunnanregion,namely,the2015Yunnanmodel,with:vP1=6.01km/s,vP2=6.60km/s,vPn=7.89km/s,H1=20km,H2=21km,vS1=3.52km/s,vS2=3.86km/s,vSn=4.43km/s.AnalysisonearthquakerelocationsbasedonthenewmodelshowsthatmostearthquakesoccurringinYunnanareatadepthof10km-20kmoftheuppercrust.TheMarch10,2011MS5.8YingjiangandAugust3,2014MS6.5Ludianearthquakesarerelocated,andthefocaldepthsdeterminedwiththenewmodelarerespectivelyclosetotheprecisepositioningresultandhypocentraldistancetothestrongmotionstationsattheepicenters,indicatingthatthenewone-dimensionalvelocitymodelcanbetterreflecttheaveragevelocitystructureofthestudyarea.

简介：　　Thehistoricalearthquakedataisoneoftheimportantfoundationsforseismicmonitoring,earthquakefore-castandseismicsafetyevaluation.However,therecognitionofearthquakeislimitedbythescientificandtechno-logicallevel.Therefore,theearthquakecanonlybedescribedusingperfectearthquakecatalogueaftertheseismo-graphisinvented.Beforethistime,theearthquakeparametersweredeterminedaccordingtotheearthquakedisas-teronthesurfaceandthewrittenrecordsinhistory,andtheearthquakelevelwasmeasuredusingearthquakein-tensity.　　……

简介：ＴｈｅｐｈｙｓｉｃａｌｉｍｐｌｉｃａｔｉｏｎｏｆｃｏｄａａｍｐｌｉｔｕｄｅｒａｔｉｏａｎｄｉｔｓｐｏｓｓｉｂｌｅａｐｐｌｉｃａｔｉｏｎＴＩＡＮ－ＺＨＯＮＧＺＨＡＮＧ（张天中）ＹＵＮ－ＳＨＥＮＧＭＡ（马支生）ＲＯＮＧ－ＬＩＡＮＧＨＵＡＮＧ（黄蓉良）Ｉｎ...

简介：

简介：SpatialscanningisdonefortworegionsinChineseMainland,wheredisplayedadenseprecursorynetworkduring1994～1998.Thetworegionsarethemid-southernsegmentoftheNorth-southseismicbelt(20°～35°N,95°～110°E)andNorthChina(36°～42°N,110°～120°E).Wetook0.5°×0.5°asaspatialwindowwithastepof0.25°and4monthsasatemporalwindowwithastepof1month.Forthetworegions,theanomalydensityisscannedfrom1994and1995respectivelyinthetworegions.TheprecursoryanomaliesareallfromtheDivisionofSeismicTrendinChinaandtheDivisionofSeismicTrendintheCapitalArea,CenterforAnalysisandPrediction,ChinaSeismologicalBureau.Aseismogenictectonicmodelisintroducedtoexplainthescanningresults.Inthemodel,thefrictionalstrengthofthefocalsourcesisdistributedrandomly.Aftertheboundaryplatemotionrateandallothergeologicalparametersaregiven,thestressofthesourcesinthesystemchangesinhomogenouslyduetothevariationofthefrictionalstreng

简介：ＲｅｓｅａｒｃｈｏｎｎｏｎｌｉｎｅａｒＲ／ＳｍｅｔｈｏｄａｎｄｉｔｓｐｐｌｉｃａｔｉｏｎｉｎｅａｒｔｈｑｕａｋｅｐｒｅｄｉｃｔｉｏｎＢｉ－ＱｕａｎＷＡＮＧ（王碧泉）；Ｈａｎ－ＭｉｎｇＨＵＡＮＧ（黄汉明）；Ｈｏｎｇ－ＳｈｕｎＦＡＮ（范洪顺）；Ｃｈｕｅｎ...

简介：ThecontrollingandinfluencingeffectsofthejointactionofplatessurroundingChinaonstrongearthquakesinChinesemainlandarediscussed,andthecharacteristicsofseismicactivitiesintheWestofChinaandneighboringregionsarefurtherstudied.TheresultsshowthattheseismicactivityintheWestofChinaandneighboringregionsnotonlyhasthecharacteristicsofhightideandlowtidealternationbutalsohasthecharacteristicsofrisinginoneregionwhilefallinginanother,andtheriseandfailofseismicityareinsomeproportion.TheabovecharacteristicsareusefulforthepredictionofmainbodyregionofstrongearthquakesinChinesemainland,especiallyforthejudgementoftheendingtimeofthehighfideperiod.

简介：ＴｈｅｐａｔｔｅｒｎｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｔｈｅｔｅｎｄｅｎｃｙｖａｒｉａｔｉｏｎｓｏｆｅａｒｔｈｒｅｓｉｓｔｉｖｉｔｙａｎｄｉｔｓｒｅｌａｔｉｏｎｔｏｅａｒｔｈｑｕａｋｅｓＨｅ－ＹｕｎＺＨＡＯ（赵和云）（ＥａｒｔｈｑｕａｋｅＲｅｓｅａｒ...

简介：ＴｈｅｎｕｍｅｒｉｃａｌｍｅｔｈｏｄｏｆＦｏｕｒｉｅｒｅｉｇｅｎｔｒａｎｓｆｏｒｍａｎｄｉｔｓａｐｐｌｉｃａｔｉｏｎｉｎｓｅｉｓｍｉｃｉｔｙａｎａｌｙｓｉｓＢＩＮＧＣＨＥＮ１）（陈兵）ＺＨＩ－ＺＨＥＮＺＨＥＮＧ２）（郑治真）ＺＡＩ－ＳＥＮＪＩＡＮＧ...

简介：ＵｐｐｅｒｍａｎｔｌｅｆｌｏｗｂｅｎｅａｔｈｔｈｅＮｏｒｔｈｗｅｓｔｏｆＣｈｉｎａａｎｄｉｔｓｌｉｔｈｏｓｐｈｅｒｉｃｄｙｎａｍｉｃｓＪＩＡＮ－ＨＵＡＨＵＡＮＧＩ（黄建华）；ＸＩＡ－ＨＵＡＣＨＡＮＧＩ（常筱华）ａｎｄＲＯＮＧ－ＳＨＡＮＦＵＩ傅容珊）（...

简介：ＳｙｎｔｈｅｓｉｚｅｄＰｏｉｓｓｏｎａｎｄｒｅｎｅｗａｌｍｏｄｅｌａｎｄｉｔｓａｐｐｌｉｃａｔｉｏｎｉｎｓｅｉｓｍｉｃｈａｚａｒｄａｎａｌｙｓｉｓＨａｎ－ＹａｏＣＨＥＮ（陈汉尧）ａｎｄＹｕ－ＸｉａｎＨＵ（胡聿贤）（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓ...