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

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：Bycalculatingtheazimuth,phaseangleandchangerateoftidalforce,andcontrastingtheirrupturetypes,wefindthatin6of11reversefaultingearthquakes,theanglesbetweenthedirectionofthehorizontaltidalforceandcompressiveprincipalstressarewithin33°,theverticalphaseanglesofall8strike-slipearthquakesareintheupwardpeaksectionandtheverticalphaseanglesoftwoextensionalnormalfaultingearthquakesareinthedownwardpeaksection.Accordingtotheabovestatistics,themechanismoftidalforcetriggeringoftheWenchuanMS8.0Earthquakeanditsstrongaftershocksisdiscussed.

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：在在M_W9.0地震前的不同时间空间的领域的地震活动的特征被学习。结果如下:①T他在澳大利亚的板的北方边界地区的深地震的活动是显然加强的since1994，显示出增加的频率，大小和深度，特别关于地震深度的异构的分发(也就是在500km和689km之间)。同时thes使神圣7.0显然在苏门答腊岛和它的附近是的M≥的地震也加强了，并且与一段大约1000km和宽度300km②T形成了一个加强的区域他有7.0显示出的M≥的全球强震的时间分发异常地震静止活动的特性在M_W9.0地震前并且在它的活跃句号期间的年，强震形成了在NWW方向罢工的一条地震的带。同时，有地震差距，M≥的地震形成5.0在震中和它的附近的区域。③TwoM≥的深地震7.0半年以前发生在西方并且在澳大利亚的板的北方边界地区的东方。他们之一在在哪儿的苏门答腊岛发生了，是著名的有M≥的没有深地震6.0发生在过去的三十年里。三天以前发生的中等震动的④Thespace分发展出了NWW罢工沿着澳大利亚的板的北方边界地区的地震的带。⑤T他在澳大利亚的板的北方边界地区散布的火山的活动在过去的4年里被加强了，特别在M_W9.0地震的出现前的几个月。

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简介：TheFebruary12,2014,MS7.3,earthquakeinYutian,Xinjiang,China,occurredasaresultofshallowstrike-slipfaultinginthetectonicallycomplexregionofthenorthernTibetanPlateau,withadepthof17km.ThisearthquakeoccurredseveralhundredkilometersnorthoftheconvergentIndia-Eurasiaplateboundary.TheepicenterlocationoftheYutianearthquake,36.1°N,82.5°E,is110kmnorthofYutianCounty,HotanPrefecture.AlargenumberofaftershocksfromML2.0toML3.0occurreduntil12:00oclock,February23,2014andthelargestaftershock,MS5.7,occurredat17:24p.m.,February12,2014.ThebandhvalueofYutiansequenceare0.70and1.29,respectively.ThewaitingtimemethodrevealsthatthestrongaftershocksaboveML4.5complywithalinearrelationship,whichisconsistentwiththecharacteristicsofamainshock-aftershocksequence.Furthermore,wecalculatethesourceparametersandanalyzetheruptureprocessbasedontheempiricalrelationshipsfortheYutianearthquake,andtheresultsindicateafrictionalundershootbehaviorinthedynamicsourceprocessoftheYutianearthquake,whichisalsoinagreementwiththelowerandsimilarbvaluescomparedwiththe2008MS7.3Yutianearthquakeandthe2012MS6.2Yutianearthquake.

简介：TheYutianearthquakewithM_S7.3happenedonFebruary12,2014.Theprecursormonitoringabilityisweakinthatarea.Wefoundtendencyanomaliesandmiddle-andshort-termanomaliesfrommetalpendulumtiltmeasurementsinHotanseismicstationbeforetheearthquake.AndwealsocomparedtheanomalieswiththatoftheM_S7.3YutianearthquakeonMarch21,2008.Thetendencyanomaliesmeasuredbythemetalpendulumtiltmeterappearedsince2012astiltingeastward.Whilethemiddle-andshort-termanomalieswerecharacterizedbyacceleration,pauseandrapidchangeoftiltrateintwodirections.Thetendencyanomaliesofmetalpendulumtiltrecordsarethesamebeforethetwoearthquakes.Theybothhappenedintheeastdirection.However,therearedifferencesinduration,characteristicandearthquakeintervalsforthemiddle-andshort-termanomalies.

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　1981122912261172°256°1171°256°连城丘家山3211Ⅴ小震群　　表中的宏观震中是根据现场调查所圈定的Ⅴ度线推测的,位于微观震中的南西方向约6公里的丘家山林场附近。震源深度则是依据经验公式计算结果推断的。二、地震烈度分布本次地震震中地处山区,强度小,地表破坏轻微,主要根据人的感觉及房屋的轻微损坏与否进行评定,划分出Ⅴ、Ⅳ度两区(见图8-1)。图8-1　1981年12月29日连城丘家山地震等震线图Ⅴ度区为极震区。Ⅴ度等震

简介：ThepaperinvertsthefocalmechanismsolutionsoftheYutianM_S7.3mainshock,foreshocksandM_S≥3.5aftershocksbyusingtheCAPmethod,basedonthebroadbandwaveformsrecordedbytheXinjiangandTibetDigitalSeismicNetworks.TheresultsshowthattheM_S7.3strongearthquakeisofstrike-sliptypewithanormalfaultingcomponent,andcombinedwiththeanalysisoffocalstructureandtheaftershockdistribution,thenodalplaneIwithstrike241°,dip90°andrake-22°isconsideredtobetheseismogenicfaultplaneofthemainshock.ThedirectionofP-axisforthemainshockis194°,closetothenearNSdirectionoftheprincipalstressP-axisofhistoricalstrongearthquakesinthisregion.ThefocalmechanismsolutionoftheM_S5.4foreshockhasagoodconsistencywiththatofthemainshock.Amongthe18aftershocks,10areofstrike-sliptype,6areofnormalfaultingtypeand2areofthrusttype.70%oftheaftershocksinthesequencehaveafocalmechanismwithP-axisinthenear-NSdirection.ThefocaldepthsofthisM_S7.3earthquakesequencesaredistributedintherangeof5km-28km,withthemajorityinthedepthrangeof15km-20km,slightlydeeperthanthedepthof10kmofthemainshockascalculated.

简介：Thispaperintroducesthegeologicalstructurebackgroundaroundthe2014YutianM_S7.3earthquakearea,investigatesandanalyzestheregimeofsmallearthquakeactivityandthecharacteristicsofregionalseismicitypatterninXinjiangbeforetheearthquake,andcomparesthecharacteristicsoftheregionalseismicactivitywiththe2008YutianM_S7.3earthquake.Theresultsshow:12~3yearsbeforethe2014YutianM_S7.3earthquake,Xinjiangwasinaseismicactivestatewithstrongearthquakeoccurringsuccessively,andbeforethe2008M_S7.3earthquake,Xinjiangwasinthequietstateofmoderate-smallearthquakeswithM3.0~4.0.2BeforethisYutianM_S7.3earthquake,theregionalseismicactivityshowedashort-termanomalyfeature,thatis,seismicityofM≥5.0earthquakessignificantlyincreasedontheAltunseismiczoneandinthesourceareathreeyearsbeforetheM_S7.3earthquake,whileafiveyearlongquiescenceofseismicityofM≥4.0earthquakesappearedontheeastofthesourceareainarangeofabout440km.SixmonthsbeforethisM7.3earthquake,thereexistedseismicgapofM3.0~4.0earthquakesandnear-conjugateseismicbeltmagnitude3.0and4.0inthesourcearea.3ThestateofstrongearthquakeactivityandtheseismicitypatternofsmallearthquakesbeforethisYutianM_S7.3earthquakeweresignificantlydifferenttothatbeforethe2008YutianM_S7.3earthquake,andthismayberelatedtothedifferentseismogenicenvironmentsofthetwoM_S7.3earthquakes.

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简介：本文通过对记录到2015年天津港＂8·12＂爆炸的32个台站的三分量数字地震波形进行倒谱分析,得到了以下结论：（1）2个主要爆炸的发生时间间隔约为32.3s;（2）爆炸-2发生在爆炸-1的西北侧约353°处;（3）依据这些记录的倒谱,无法判定在爆炸-1前是否还存在微小的爆炸。以上结论均与前人研究成果吻合。由于倒谱叠加采用的是全波形,对滤波频带不敏感,因此,在检测发生在同一地点的多次爆炸或其它类似事件（如核爆）上有一定的优势。

简介：Micro-aftershockswithmagnituderangeof1.5-4aroundtheWenchuanearthquakeepicenter,thesouthernpartoftheLongmenshanfaultzone,exhibitgoodfrequency-magnitudelinearrelationships,thusenablingb-valueanalysis.Theaverageb-valueformicro-aftershocksofM1.5-4fromJulytoDecemberof2008inourlocalstudyregionisabout0.88,similartotheb-valueforallaftershocksofM3.0-5.5fromMay,2008toMay,2009alongthewholeLongmenshanfaultzone.Thesimilaritybetweenthelocalandregionalb-valuespossiblyindicatesthatthesouthernpartoftheLongmenshanfaultzonehassimilarseismogenicenvironmenttothewholeLongmenshanfaultzone.Alternatively,itmayalsoimplythatb-valuesderivedfromalleventswithoutconsiderationofstructuralvariationcannotdiscriminatelocal-scaletectonicinformation.Thepresentstudyshowsthattheb-valuefortheWenchuanearthquakemicro-aftershocksvarieswithdifferentregions.Theb-valueinsouthwestoftheYingxiutownishigherthanthatinthenortheastoftheYingxiutown.Thehighb-valueinthesouthwestpartwheretheWenchuanearthquakemainshockhypocenterlocatedindicatesthatthecurrentstressaroundthehypocenterregionismuchlowerthanitssurroundingarea.Theb-valuesarealsodependentondepth.Atshallowdepthsof<5km,theb-valuesareverysmall(~0.4),possiblybeingrelatedtostrongwaveattenuationorstrongheterogeneityinshallowlayerswithhighcontentofporosityandfractures.Atdepthsof~5-11km,wheremostaftershocksconcentrated,theb-valuesbecomeashighas~0.9-1.0.Atthedepthbelow~11km,theb-valuesdecreasewiththedepthincreasing,beingconsistentwithincreasingtectonichomogeneityandincreasingstresswithdepth.