简介：　　Introduction　　Withrapiddevelopmentandadvancementofeconomyandsociety,lotsofcitygroupsorcitybeltswithex-tra-largecitiesastheircentershavebeenformedinChina.Theregionsthesecitygroupslieinusuallyhavewell-developedeconomy,densepopulation,andareregionalpoliticsandculturecenters.Somegroupslieintheregionswithhighlevelofearthquakeactivity,suchastheSurroundingCapitalCityGroupwiththecentersofBei-jingandTianjin.Oncealargeearthquakeoccurs,itsinfluencewillspreadtoveryextensiveregionanditsdisasterwillbetremendoustoo.Soearthquakeresistanceanddisastermitigationofcitygroupwillbeverysignificantissue.Thecitiesinagrouphaveclosedistancewitheachother;theycancarryoutunifiedpreparationfordisasterasonewholeandreducetheheavyloadofsinglecitybeforeanearthquake,andhaveanadvantageofpromptmutual-aidafteranearthquakebecauseofclosedistance.Itisespeciallysignificanttomitigatetheloseoflives.Oneimportantpreconditionisthatallthecitiesinonegroupcannotbeexposedtothesamelevelofdestroyduringoneearth-quake.Sothedivisionofcitygroupintheregionwithdensecitiesdistributionshallbeverysignificanttotheemergentmutual-aidinearlytimeafteralargeearthquake.Forthisgoal,thecharacteristicsandcorrelativityofearthquake′simpactoncitiesinonegroupneedtoclearlybeconsidered.Thecitieswithsimilarfeaturesandstrongcorrelativityofhistoricalearthquakeinfluencehavelargechancetosuffersameleveldestroyduringthefuturestrongearthquakeandaredisadvantagetoprovidemutual-aidandshallnotbedividedintoonegroup.　　……

简介：ThestudiesonthestructureandphysicalpropertiesoftheEarth'sinteriordonebyChinesegeophysicistsfrom1999to2002werereviewedinthispaper.Itincludesseveralresearchareas:thestructureoftheEarth'sinteriorsusingseismictomography,anisotropyoftheuppermantleinChinaanditsadjacentareas,qualityfactorQβforSwaves,subductionzone,mantlediscontinuities,physicalpropertiesofEarth'smaterialsandothers.Thereviewconcernsmainlythecontents,themethodsandtheresultsofthestudies.ItcanbeseenthatnewprogressinthestudyonthestructureandphysicalpropertiesoftheEarth'sinteriorhasbeenmadeinthelast4yearsinChina.Itisshownonthreeaspects:advancementmadeonsomepreexistentareas;pioneeringonsomenewfieldsandnewmethodsadopted.

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简介：为测定震源机制及对S波射线做切线,描绘出S波波场是很有用的。就单力偶来说,S波射线的切线已知是些公共直径同运动矢量相一致的大圆。就双力偶来说,它们的几何要复杂些。本文我们介绍它们的方程及从中导出的一些重要特性。根据这些特性,在极射赤投影图上可直接做出这些切线。对于这组分析,我们给出单力偶情况下,S波射线切线的方程及从它推出已知的特性,它表明两种情况下随后的推论是精确的。就双力偶情况,我们还加了一个描绘这些线的极射赤投影绘制过程的附录。

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

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简介：AstatisticalanalysisoftectonicenvironmentforM≥6.0strongearthquakesinChina'scontinentsincethebeginningofrecordedhistoryisperformedbasedonthedataofactivefaultsstudiedduringlast10yearsandresultofcompilationofthefourthversionoftheMapofSeismicRegionalizationofChinaforEarthquakeProtection.Tectonictypesofseismicsourcesofstrongearthquakesinallseismicregionsandthemovementmodesofseismogenicstructuresarediscussed.Meanwhile,ananalysisoflengthsofsurfacerupturezonesproducedbyalltypesofearthquakes,orientationsoflongaxesofmeizoseismalareas,regionaltectonicstressfieldsinseismicsourceregionsforstrongearthquakes,geophysicalfields(gravityanomaly,highconductivitylayeranomaly,andterrestrialheatflowdensity),andrecentverticalcrustaldeformationfieldshavebeencarriedout.

简介：利用积累的磁照图——S_q曲线,通过计算机进行S-q图象编整处理后作对比分析,对局部磁异常(S_q时段)变化进行探讨,总结地震孕育过程震磁效应的相关性,更好地为地震预报提供依据。

简介：ＡｓｏｕｒｃｅｅｘｔｅｎｔａｎａｌｙｓｉｓｏｆｔｈｅＬａｎｃａｎｇｅａｒｔｈｑｕａｋｅ（Ｍｓ＝７．６）ｏｆ１９８８ＳＩ－ＨＵＡＺＨＥＮＧ（郑斯华）ＪＩＡＮＹＡＮＧ（杨健）ＣｅｎｔｅｒｆｏｒＡｎａｌｙｓｉｓａｎｄｐｒｅｄｉｃｔｉｏｎ，ＣｈｉｎａＳｅｉｓ...

简介：BasedonSwaverecordsofdeepteleseismsonDigitalSeismicNetworkofShanxiProvince,shearwavevelocitystructuresbeneath6stationswereobtainedbymeansofSwavewaveformfitting.Theresultshowsthatthecrustisthickinthestudiedregion,reaching40kminthicknessunder4stations.Thecrustallalternativeshighvelocitylayerwithlowvelocityone.Thereappearvariedvelocitystructuresfordifferentstations,andthestationsaroundthesametectonicregionexhibitsimilarstructurecharacteristics.Combinedwithdominantdepthdistributionofmanysmall-moderateearthquakes,thecorrelationbetweenseismogeniclayersandcrustalstructuresofhighandlowvelocitylayershasbeendiscussed.

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：Inthisarticle,weanalyzethecharactersofSV-componentreceiverfunctionofteleseismicbodywavesanditsadvantagesinmappingtheS-wavevelocitystructureofcrustindetail.Similartoradialreceiverfunction,SV-componentreceiverfunctioncanbeobtainedbydirectlydeconvolvingtheP-componentfromtheSV-componentofteleseismicrecordings.OuranalysesindicatethatthechangeofamplitudeofSV-componentreceiverfunctionagainstthechangeofepicentraldistanceislessthanthatofradialreceiverfunction.Moreover,thewaveformofSV-componentreceiverfunctionissimplerthantheradialreceiverfunctionandgivesprominencetothePSconvertedphasesthatarethemostsensitivetotheshearwavevelocitystructureintheinversion.ThesynthetictestsshowthattheconvergenceofSV-componentreceiverfunctioninversionisfasterthanthatoftheradialreceiverfunctioninversion.Asanexample,weinvestigatetheS-wavevelocitystructurebeneathHIAstationbyusingtheSV-componentreceiverfunctioninversionmethod.

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简介：Inordertodeterminethedegreeofreturning-to-zerooftemperaturesofdeformedcalcite,aseriesofrock-breakingexperimentsweredesignedtotestcalcite-richlimestonesamplesunderfixedconfiningpressuresanddifferenttemperatures.Theconsolidateddeformedsamplesintheirinitialstatewereobservedunderamicroscopeandthemicroscopicindicatorsindifferentzero-returningstateswereputforward,thusprovidingamicroscopicfoundationforevaluationofreliabilityofdatingvaluesofdeformationincalcite.Atlast,thecorrectionofdatingvaluesofdeformationforsampleswhosetemperaturehasnotyetreturnedtozeroisdiscussed.

简介：ＩｎｔｅｒｐｒｅｔａｔｉｏｎｏｆＳｗａｖｅｄａｔａｆｒｏｍＴａｉ′ａｎＸｉｎｚｈｏｕＤＳＳｐｒｏｆｉｌｅａｎｄｉｔｓｒｅｌａｔｉｏｎｓｈｉｐｗｉｔｈＸｉｎｇｔａｉｅａｒｔｈｑｕａｋｅｓＳＯＮＧＹＡＮＳＯＮＧ（宋松岩）１）ＸＵＥＳＯＮＧＺＨＯ...

简介：Ｃｏｍｐｌｅｘ　ｔｉｍｅ－ｓｐａｃｅ　ｓｐｒｅａｄｉｎｇ　ａｎｄ　ｆｏｃａｌ　ｍｅｃｈａｎｉｓｍ　ｏｆ　ｔｈｅ　１９８９　Ｂａｔａｎｇ　ｅａｒｔｈｑｕａｋｅ　ｓｗａｒｍ　（Ｍ＿ｓ＝６．７）（程万正）（陈天长）Ｃｏｍｐｌｅｘｔｉｍｅ－ｓｐａｃｅｓｐｒｅ...

简介：应用ＣＤＳＮ台网兰州数字台的记录和中法合作建立的朗索数字台的记录，研究了１９９５年７月２２日甘肃永登５．８级地震和１９９６年６月１日天祝－古浪５．４级地震前台剪切波分裂的特征。结果表明，在永登地震前大约１年的时间延迟和偏振方向很快恢复。因此，可以认为，此次地震前ＮＷ向，地震后剪切波分裂时间延迟和偏振方向很快恢复。因此，可以认为，此次地震前Ｓ波分裂方向的前兆特征是明显的。对于天祝－古浪５．４级地震，

简介：为了提高卫星云图在天气预报中应用的及时有效性,经常需要尽快显示实时接收的卫星数据云图.各省气象台中规模利用站接收的FY2C卫星云图的实时数据,格式为gpf,需要先进行通道分离后才能显示图像,本文主要介绍各种投影类型的gpf数据经通道分离后,对其单通道云图进行小波分析,以便简单直观地分析云图的特征、提高云图的传输效率.

简介：IntroductionRegionalseismicitytriggeredbybigearthquakesaswellasattershocksinsourcezonecouldbedetectedduetothehighseismicmonitoringcapabilitytoday(Anderson,etal,1994;Bodin,Gomberg,1994;Caskey,Wesnousky,1997;Deng,Sykes,1996;Hill,etal,1993;King,etal,19...

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