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ULF wave indices to characterize the solar wind-magnetosphere interaction and relativistic electron dynamics

dc.contributor.authorRomanova, N.
dc.contributor.authorPilipenko, V.
dc.date2009
dc.date.accessioned2016-04-05T10:30:18Z
dc.date.available2016-04-05T10:30:18Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3243
dc.descriptionTo quantify the level of low-frequency wave activity of the magnetosphere and IMF, a set of the ULF wave power indices has been introduced. We demonstrate that the ULF activity global level can be very useful in space weather related problems. The application of the interplanetary index to an analysis of auroral activity driving has shown that a turbulent IMF drives auroral activity more strongly than the laminar solar wind does. The enhancements of relativistic electrons at the geosynchronous orbit are known not to be directly related to the intensity of magnetic storms. We found that the electron dynamics correlated well with long-lasting intervals of elevated ground ULF wave index. This fact confirms the importance of magnetospheric ULF turbulence in energizing electrons up to relativistic energies. The time-integrated ULF index demonstrates a significantly higher correlation with electron fluxes, which implies the occurrence of a cumulative effect in the electron energization. © Versita Warsaw and Springer-Verlag Berlin Heidelberg 2009.
dc.languageeng
dc.titleULF wave indices to characterize the solar wind-magnetosphere interaction and relativistic electron dynamics
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeAtoms
dc.subject.freeDynamics
dc.subject.freeElectrons
dc.subject.freeFlow interactions
dc.subject.freeGeomagnetism
dc.subject.freeMagnetosphere
dc.subject.freeNuclear energy
dc.subject.freePlasma accelerators
dc.subject.freeSolar system
dc.subject.freeSolar wind
dc.subject.freeStorms
dc.subject.freeTurbulence
dc.subject.freeUltrashort pulses
dc.subject.freeWave power
dc.subject.freeAuroral activities
dc.subject.freeCumulative effects
dc.subject.freeElectron acceleration
dc.subject.freeElectron dynamics
dc.subject.freeElectron energization
dc.subject.freeElectron fluxes
dc.subject.freeGeosynchronous orbits
dc.subject.freeGlobal levels
dc.subject.freeMagnetic storms
dc.subject.freeMHD turbulence
dc.subject.freeRelativistic electrons
dc.subject.freeRelativistic energies
dc.subject.freeSolar wind-magnetosphere interaction
dc.subject.freeSpace weathers
dc.subject.freeULF waves
dc.subject.freeWave activities
dc.subject.freeSolar energy
dc.subject.freeaurora
dc.subject.freeelectron
dc.subject.freegeomagnetic storm
dc.subject.freemagnetosphere
dc.subject.freesolar activity
dc.subject.freesolar wind
dc.subject.freeturbulence
dc.subject.freewave power
dc.source.titleActa Geophysica
dc.source.volume57
dc.source.issue1
dc.source.page158-170
Orfeo.peerreviewedYes
dc.identifier.doi10.2478/s11600-008-0064-4
dc.identifier.scopus2-s2.0-58049211908


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