Atmosphere-ionosphere response to the M9 Tohoku earthquake revealed by multiinstrument space-borne and ground observations： Preliminary results-中国Betway体育网页登陆

摘要 WeretrospectivelyanalyzedthetemporalandspatialvariationsoffourdifferentphysicalparameterscharacterizingthestateoftheatmosphereandionosphereseveraldaysbeforetheM9Tohoku,JapanearthquakeofMarch11,2011.Thedataincludeoutgoinglongwaveradiation(OLR),GPS/TEC,lowerEarthorbitionospherictomographyandcriticalfrequencyfoF2.OurfirstresultsshowthatonMarch7tharapidincreaseofemittedinfraredradiationwasobservedfromthesatellitedataandananomalydevelopedneartheepicenter.TheGPS/TECdataindicateanincreaseandvariationinelectrondensityreachingamaximumvalueonMarch8.StartingfromthisdayinthelowerionospherealsotherewasconfirmedanabnormalTECvariationovertheepicenter.FromMarch3to11alargeincreaseinelectronconcentrationwasrecordedatallfourJapaneseground-basedionosondes,whichreturnedtonormalafterthemainearthquake.ThejointpreliminaryanalysisofatmosphericandionosphericparametersduringtheM9Tohoku,Japanearthquakehasrevealedthepresenceofrelatedvariationsoftheseparametersimplyingtheirconnectionwiththeearthquakeprocess.Thisstudymayleadtoabetterunderstandingoftheresponseoftheatmosphere/ionospheretothegreatTohokuearthquake.

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Atmosphere-ionosphere response to the M9 Tohoku earthquake revealed by multiinstrument space-borne and ground observations： Preliminary results

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