Multi-Satellite Observations of Transient Proton Belts Near L = 3

Details Multi-Satellite Observations of Transient Proton Belts Near L = 3 Multi-Satellite Observations of Transient Proton Belts Near L = 3

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm33c1917c&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM33C-1917

Physics

[2720] Magnetospheric Physics / Energetic Particles: Trapped, [2730] Magnetospheric Physics / Magnetosphere: Inner, [2774] Magnetospheric Physics / Radiation Belts

Scientific paper

Solar energetic particle events are one of several solar-terrestrial phenomenon that can be hazardous to spacecraft operating in the near-Earth plasma environment. During the CRRES era, numerous solar proton events were observed, each followed by a storm sudden commencement (SSC) and the subsequent formation of a new proton belt [Hudson et al., 1997]. We use recent observations from the Polar-CEPPAD investigation and HEO spacecraft to examine the formation of energetic (~20 MeV) transient proton belts near L = 3. We consider several events from 2004, during the declining phase of solar cycle 23, where transient proton belts are associated with SSC s driven by interplanetary shocks. We find that the proton belts persist on the order of one month and span a radial distance of approximately one L-shell. We consider several possible mechanisms responsible for the temporal duration and spatial extent of the transient belts. The multi-satellite observations, in particular the energetic pitch-angle distributions from Polar-CEPPAD, offer a new perspective on these phenomenon.

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