简介：~~

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　19940916142020118°41′22°36′台湾海峡73191Ⅷ主余震型　　表中震源深度为台湾台网测定。二、地震烈度分布震中位于远离陆地的海域,调查在闽粤沿海陆地上进行,最高烈度为Ⅵ度,存在Ⅵ度强乃至Ⅶ度的异常点,仅勾划出Ⅵ度及Ⅴ度两条等震线(见图19-1),它们均呈北东走向微向北西突出的弧形。图19-1　1994年9月16日台湾海峡地震等震线图Ⅵ度区:成带状展布于福建省厦门、漳州及广东省汕头、潮州等地。Ⅵ度等震线北起福建省泉州的石

简介：ThetimeseriesofcoordinatesofalargenumberofGPSstationsintheworld,processedbyProf.GeoffreyBlewittwithGIPSYsoftwareareavailableathttp://geodesy.unr.edu.BasedonthetimeseriesofcoordinatesintheglobalreferenceframeofIGS08atmorethan250stationsofcontinuousGPSobservations,downloadedfromthewebsite,theco-seismicdisplacementsoftheM7.3KyushuearthquakeonApril16,2016inJapanandthepre-seismicstrainaccumulationsanddisplacementsintheregionalreferenceframewereobtained.ThestationofcontinuousGPSobservationatBJFSnearBeijinghasbeenquitestableindisplacementintheeasternpartofChinaformorethan17yearssincethebeginningofitsoperation,andthisstationisusedasthecorestationintheregionalreferenceframeforthepre-seismicdisplacementoftheKyushuearthquakeofM7.3.Themainfeatureofthepre-seismicdisplacementsoftheKyushuearthquakeischaracterizedbylockinginthecrustatandneartheepicenter.Theanomalouspre-seismicstrainaccumulationdevelopedinanareaofanomalousaccumulationoftheshearstraincomponentofγ1onthenortheastsideoftheepicenter,withincreasingsizeoftheareaandincreasingmagnitudeinγ1.Thelargestareacoveredbytheanomalousγ1isabout2000km2.ThechangeintheEcomponentatBJFSsinceNovember26,2015wascausedbythereplacementofthereceiverandtheantennaatthestation.Inordertostudytheshort-termchangeindisplacementsatstationsatandneartheepicenter,thetimeseriesat3stationswithcontinuousGPSobservations,2atSUWNandDAEJinsouthKoreaand1atBJSHnearBeijingwereanalyzed.Theanalysisshowsthatthedisplacementsatthe3stationshavebeenquitestableinthesamemannerineastAsia.Thus,BJSHisusedasthecorestationintheregionalreferenceframeofdisplacementandthedisplacementtimeseriesshowthattherewerenosignificantshorttermanomaliesbeforetheearthquake

简介：UsingthefocalmechanismsolutionsandslipdistributionmodeldataoftheTaiwanStraitsMS7.3earthquakeonSeptember16,1994,wecalculatethestaticCoulombstresschangesstemmingfromtheearthquake.Basedonthedistributionofaftershocksandstressfield,aswellasthelocationofhistoricalearthquakes,weanalyzetheCoulombstresschangetriggeredbytheTaiwanStraitsMS7.3earthquake.TheresultshowsthatthestaticCoulombstresschangeobtainedbyforwardmodelingbasedontheslipdistributionmodelisquiteconsistentwiththelocationofaftershocksintheareasfarawayfromtheepicenter.Ninetypercentofaftershocksoccurredinthestressincreasedareas.TheCoulombstresschangeisnotentirelyconsistentwiththedistributionofaftershocksneartheepicenter.ItisfoundthatCoulombstresschangecanbetterreflecttheaftershockdistributionfarawayfromtheepicenter,whilesuchcorrespondingrelationshipbecomesquitecomplexneartheepicenter.ThroughthecalculationoftheCoulombstresschange,wefindthatthestressincreasesinthesouthwestpartoftheMin-Yue(Fujian-Guangdong)coastalfaultzone,whichenhancestheseismicactivity.Therefore,itisdeemedthattheseaareabetweenNanpengIslandandDongshanIsland,wheretheMin-YuecoastalfaultzoneintersectswiththeNW-trendingShanghang-Dongshanfault,hasahighseismicrisk.