Modeling the Relativistic Electron Belt During the July and November 2004 Storms

Details Modeling the Relativistic Electron Belt During the July and November 2004 Storms Modeling the Relativistic Electron Belt During the July and November 2004 Storms

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm33a0435b&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM33A-0435

Physics

2720 Energetic Particles: Trapped, 2730 Magnetosphere: Inner

Scientific paper

The magnetic storm which commenced on 22 July 2004 resulted in the most intense relativistic electron event of the past solar cycle [Brautigam, 2004; Blake and O'Brien, 2004]. A few months later, a second storm which commenced on 7 November 2004 resulted in nearly an identical electron flux profile. Despite the resulting profiles being very comparable, the dynamics of the individual storms were quite different. Both storm Dst signatures show 3 distinct minima within a 4-day period (for July the minima are -101, -148, and -197 nT; and for November are -373, -289, and -109 nT). The July storm is characterized by a series of stepwise inward displacements of the electron flux profile inner edge over several days, whereas the November storm is characterized by a single abrupt inward displacement at the beginning of the storm. The electron population is modeled throughout both storms using magnetic activity dependent radial diffusion coefficients (DLL) and boundary conditions in an analogous fashion to that followed for the October 1990 storm [Brautigam and Albert, 2000]. Electron flux data from the Air Force Research Laboratory Compact Environmental Anomaly Sensor (CEASE) in LEO orbit will be used. The effects of using different magnetic field models and different forms of DLL will be explored. Blake, J.B. and T.P. O'Brien (2004), A Remarkable Energetic Electron Event in Late July 2004, Eos Trans. 85(47), Fall Meet. Suppl., Abstract SM41A-1106 Brautigam, D.H. (2004), Comparison of MeV Electron Response During the October-November 2003 and July 2004 Storm Intervals, Eos Trans. 85(47), Fall Meet. Suppl., Abstract SM41A-1128 Brautigam, D.H., and J.M. Albert (2000), Radial diffusion analysis of outer radiation belt electrons during October 9, 1990, magnetic storm, J. Geophys. Res., 105, 291-309.

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