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：近5年来，乌鲁木齐4号泉水中甲烷含量逐年呈趋势性降低。本文从泉点地质构造、水文地球化学环境入手，结合水文气象资料，分析并论正了甲烷逐年趋势性变化的原因。

简介：研究了山东德州2号井2004年9月11日水氟高值异常变化特点，对水氡高值异常的原因进行了系统的探讨。详细调查影响水氡变化的各种环境因素和人为因素，进行科学的数据分析、合理推断和试验验证。结果表明：该“异常”是由于临近水井抽水引起的干扰，不是地震异常。研究论证了开展流体氡前兆观测与分析预报的同时开展流体氡的动态变化及其影响因素研究的必要性。

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

简介：依据区域水文地质、地球化学环境特征,研究了濮阳市地震台2号井水化动态的变化原因.濮阳台2号井属多层-混合型井孔,采用双含水层进行水化观测,其水化动态的变化受地下水开采的影响.

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

简介：2013年5月7日～9日河南濮阳清丰地震台清丰2号井水位快速下降约0.18m,下降幅度大于平常下降幅度,9日起水位慢慢恢复.对产生水位快速下降的原因进行了调查分析,研究结果显示：河南濮阳清丰2号井水位下降是由于同层地下水开采抽水造成的,不是地震前兆异常变化.

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：一种曾对1997年新疆伽师的2次6级强震及2001年四川雅江6.0级地震作了较成功预报的思路为：“两显著地震的地方平太阴时夹角小于45°，且震级呈上升趋势是判断后续强震的有效指标”，利用该方法对1960年以来宁夏及邻区的中强地震进行了预测检验。在宁夏的吴忠，灵武地区和内蒙古的巴音木仁发生的中强地震前得出了较为满意的结果。认为该方法可以作为一种地震前兆指标。用于中强地震的时间预测。

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.

简介：Ｐｒｅｌｉｍｉｎａｒｙｒｅｓｕｌｔｏｆ３ＤｇｒａｖｉｔａｔｉｏｎａｌｆｏｒｗａｒｄｃａｌｃｕｌａｔｉｏｎｓｔｕｄｙｉｎＢｏｈａｉＳｅａＧＵＡＮＧＸＩＡＬＩＵ１）（刘光夏）ＷＥＮＪＵＮＺＨＡＯ２）（赵文俊）ＷＥＮＪＵＲＥＮ１）（任文菊）ＸＩＵ...

简介：通过描述传统测绘地形图在防灾减灾中的特殊作用及局限性，进而介绍了现代测绘高科技“3S”技术在灾害防治中的应用前景及其优越性。

简介：Theexperimentalresultsof3-Dfractureundercompressionareintroducedinbriefandthetheoryofstresscriterionof3-Dfractureisstudied.Methodstoimitateinitialfracturesaredeveloped.Itispointedthatthereareimportantdefectsintheextremevalue(EV)methodeverproposedbyPalaniswamyandKnauss.ThemajordefectliesinthatonlytwoEulerangles(2EA)areconsidered,butanotheroneisneglected.IfthevariationofallthethreeEulerangles(3EA)areconsidered,onecangetbetterresultwhichisconsistentwiththeobservationoffaultingthatextendsoncurvedsurfacesbutnotonplanes.Themethodofevaluatingmaximalnormalstressdirectionvector(NSDV)isproposedandfurtherprovedtobeequivalenttothe3EAmethod.ItisprovedthattheNSDVmethodcanbefurtheroptimizedtothemethodofcompositionofthefirstprincipaldifferentialplane(CFPDP).TheresultsfromCFPDPmethodcanfitthecurvedsurfacesofinitialgrowthobservedintheexperimentsof3-Dfracture.TheCFPDPmethodcanalsobeusedtointerpretthe3-Dfracturesoftheslippingsectionbetweentheasperitiesintheburiedfaultplanethatismodeledasellipsecrack.Theresultsof3-Dfracturecanbeappliedtointerpretingtherelatedproblemsoffaultingincludingthemechanismofalotofshatterrockswithdifferentdimensions,thecauseofearthquakesoccurredattheedgeofplateunderlowshearstress,andthemechanismofanisotropycausedbytheextensivedilatancyanisotropy(EDA)cracks.

简介：TheJuly3,2015PishanM_S6.5earthquakeoccurredintheintersectionareaoftheTarimblockandWestKunlunblockwherethemoderate-strongearthquakeshavebecomeactiveinrecentyears.Thispaperhasstudiedtheseismicityparametersoftheearthquakesequencessuchastheb-valueinthePishanregionanditsvicinity.Inaddition,wealsorelocatedtheaftershocksofthePishanM_S6.5earthquakeusingtheseismicphasereportbythedouble-differencemethod.ThetemporalandspatialvariationcharacteristicsofthePishanearthquakesequenceintherupturezoneareanalyzed.Thestudyisofgreatsignificanceintheseismichazardassessmentinthisregion.

简介：ＢｏｄｙｗａｖｅｆｏｒｍｉｎｖｅｒｓｉｏｎｆｏｒｔｈｅｓｏｕｒｃｅｐｒｏｃｅｓｏｆｔｈｅＦｅｂｒｕａｒｙ３，１９９６Ｌｉｊｉａｎｇ，ＹｕｎｎａｎｅａｒｔｈｑｕａｋｅＹＡＮＧＸＵ１）（徐扬）ＭＡＳＡＹＵＫＩＫＩＫＵＣＨＩ２）（菊地正幸）ＹＯＵ－ＪＩＮ...

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：本文通过对漳州开发区7号山体硐室大爆破振动速度、加速度的测试及数据的初步分析,阐述了爆破地震波衰减规律及其影响因素。并引入平均衰减指数的概念,对开发区当地以后众多的大、中型爆破抗震的安全设计提供有益的依据。

简介：边界条件能显著地在强烈地震下面影响斜坡行为。为了为有限元素(FE)评估边界条件的重要性，一张饮料桌子的模拟在斜坡反应上试验，一验证三维(3D)非线性的FE模型被介绍，并且数字、试验性的结果被比较。为那个目的，基于公开源码的计算站台OpenSees，柔韧的图形的用户接口SlopeSAR被采用，它简化努力集中的预处理和processing以后阶段。网孔决定效果也被探讨。参量的研究被执行在在结束脸包含边界程度和边界条件的三种类型的FE模型上评估边界条件的影响。通常，在边界程度的变化生产不一致的斜坡变丑。为二张结束脸，修理y方向排水量不是适当的模仿饮料桌子实验，结束墙在僵硬、不平。另外，3D的长度的影响倾斜最高的脸和处于二之间的差别的一个重要角色在结束边界条件打的斜坡戏的宽度面对(修理y方向排水量并且修理(y，z)方向排水量)。总的来说，这研究加亮对在模拟和试验性的结果之间的比较的评价竟然与到期的考虑被执行到边界的效果，这调节。

简介：Inthispaper,wedeterminedanearthquakesequencelocationintheXingfengjiangareafromJune,2007toJuly,2014andthe3DP-wavevelocitystructurebyasimultaneousinversionmethod.Onthatbasis,westudiedtheoccurrencefeaturesofactivetectonicsandtheearthquakesourcemechanism.Theresultsshowthatthereservoirfracturesystemhasatendencytoincreasewithgradualdepthfromsoutheasttonorthwest,consistentwithgravitationalfieldresearchresults.Thereare4highvelocityzones(HVZ)underthedepthofthe7km-12kmcrustbetweentheXinfengjiangReservoirdamandXichangDistrict,Dongyuan.ThemaxvelocityofthebiggestHVZwhichisunderXichangis6.3km/s.Underthereservoirdamthereisastrongtectonicdeformationzone,asthecenterexitRenzishifault(F2),Nanshan-Aotoufaults(F4),Heyuanfault(F1)andShijiao-Xingang-Baitianfault(F5),7earthquakeswithML≥5.0(includingM6.1inMarch,1962)occurredatthehighgradientzoneoftheHVZⅢandHVZⅣedgewhichhasbeenunderthereservoirdamsince1960,withrelativityenergyreleasingmorethoroughly.ModerateseismicactivityoccurredattheHVZⅠedgewhichhasbeenunderXichangsince2012,andisadangerzoneforM5.0earthquakesinthefuture.