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          Institute: MPI für extraterrestrische Physik     Collection: Space Plasma Physics     Display Documents

ID: 14579.0, MPI für extraterrestrische Physik / Space Plasma Physics
Relationship between ULF waves and radiation belt electrons during the March 10, 1998 storm
Authors:Nakamura, R.; Blake, J. B.; Elkington, S. R.; Baker, D. N.; Baumjohann, W.; Klecker, B.
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Advances in Space Research
Journal Abbrev.:Adv. Space Res.
Volume (in Journal):30
Issue / Number:10
Title of Issue:Advances in Global Magnetospheric Structure, Dynamics, and Region Coupling
Full Name of Issue-Editor(s):Spence, H.
Start Page:2163
End Page:2168
Name of Conference/Meeting:Advances in Global Magnetospheric Structure, Dynamics, and Region Coupling
Place of Conference/Meeting:Warsaw, Poland
(Start) Date of Conference/Meeting
End Date of Conference/Meeting 
Copyright:2002 Cospar
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Acceleration of electrons due to ULF oscillations is considered to be an explanation for the radiation belt electron flux enhancement during the storm. In this study, we examine the relationship between the ULF wave activity observed by the Equator-S satellite and the relativistic electron flux variation observed by POLAR satellite during a magnetic storm which commenced on March 10, 1998. The storm was associated with a 5-day high speed solar wind interval. Rapid enhancement of MeV electrons was observed in the outer radiation belt within the first half day after the storm commencement with strong pancake distribution in equatorial pitch angle, followed by a more gradual flux increase for the next several days with a more isotropic distribution. During this interval, when both rapid and gradual acceleration of electrons took place, enhanced ULF wave activity was observed in the dawnside magnetosphere extending down to L < 6 region. We compare the observations with different models considering the ULF waves. The observation generally supports the mechanisms of the electron acceleration due to interaction with ULF waves, although different mechanisms are possibly involved for acceleration during the early recovery phase and the later recovery phase. (C) 2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für extraterrestrische Physik
External Affiliations:OAW, Inst Weltraumforsch, A-8042 Graz, Austria; OAW, Inst Weltraumforsch, A-8042 Graz, Austria; Aerosp Corp, Los Angeles, CA 90009 USA; Univ Colorado, LASP, Boulder, CO 80309 USA; Max Planck Inst Extraterr Phys, D-85741 Garching, Germany
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