HR: 0830h
AN: SM41C-0584    [PDF]
TI: A Long-lived Enhancement of $>$30 keV Electron Fluxes at Very Low L-values
AU: * Evans, D S
EM: david.s.evans@noaa.gov
AF: Space Environment Center, 325 Broadway, Boulder, CO 80305 United States
AU: Greer, S
EM: sue.greer@noaa.gov
AF: Space Environment Center, 325 Broadway, Boulder, CO 80305 United States
AU: Soraas, F
EM: finn.soraas@fi.uib.no
AF: University of Bergen, Allegaten 55, Bergen, 5000 Norway
AU: Oksavik, K
EM: kjellmar.oksavik@fys.uio.no
AF: University of Oslo, POB 1048 Blindern, Oslo, N-0316 Norway
AB: Beginning in May, 2003 and continuing through the summer, the NOAA/POES satellites have observed the $>$30 keV trapped electron fluxes at L-values between 1.18 and 1.22 elevated by about a factor of 100 over their normal intensities. At lower L-values the electron fluxes have displayed dramatic (factors of 1000 and more), but short lived, intensity increases. We hypothesize that solar wind/magnetospheric activity, especially the storm of May 29, greatly enhanced the energetic electron population at L-values above 1.18 where losses to the atmosphere are low. Continued magnetospheric activity during the summer transported electrons from that reservoir inward in L thus producing large intensity enhancements on drift shells that intersect the atmosphere where the electrons are quickly lost. NOAA/POES observations complemented with data from other spacecraft supporting this hypothesis will be presented.
DE: 2720 Energetic particles, trapped
DE: 2730 Magnetosphere--inner
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting