HR: 0800h
AN: SM41A-1128    [Abstracts]
TI: Comparison of MeV Electron Response During the October-November 2003 and July 2004 Storm Intervals
AU: * Brautigam, D H
EM: Donald.Brautigam@hanscom.af.mil
AF: Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Rd, Hanscom AFB, MA 01731 United States
AB: A comparison of the MeV electron response during the October-November 2003 and July 2004 storm intervals is made using data from the Air Force Research Laboratory Compact Environmental Anomaly Sensor (CEASE) flying in low Earth orbit on the TSX-5 spacecraft. An intense solar proton event commenced on 28 October 2003, and was followed by a very large geomagnetic storm with two distinct Dst minima recorded on 30 October at 01 hr UT (-363 nT) and 23 hr UT (-401 nT). An intense injection of electrons into the slot region followed, with $>$1.2 MeV fluxes peaking at L=2.5 on 02 November and subsequently decaying away over the next several weeks. The July 2004 storm interval was marked by a Dst index that exhibited three distinct minima of -104 nT (23 July), -150 nT (25 July), and -182 nT (27 July). This active period produced an enhanced MeV electron population that peaked between L=3-4 and penetrated to L=2. The fluxes remained above pre-storm levels for several weeks. Although the 2004 storm period did not produce as large a negative Dst excursion as the 2003 storm, it produced more intense fluxes and a much harder spectrum. The MeV electron spectra and decay profiles throughout the two storm periods will be compared and discussed.
DE: 2720 Energetic particles, trapped
DE: 2730 Magnetosphere--inner
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting