Long-term observations of keV ion and electron variability in the outer radiation belt from CRRES
Journal Article
·
· Geophysical Research Letters
- Institut fuer Aeronomie, Katlenburg-Lindau (Germany)
The distribution of energetic electrons and ions with L-value (L<8) as measured by the Electron-Proton Angle Spectrometer onboard CRRES over the whole mission lifetime is presented. The outer radiation belt is shown to be highly dynamic, both in position and in strength. Substantial enhancements of electron and ion flux on short timescales are seen throughout most of the magnetosphere sampled by CRRES, and are strongly related to the Kp index and the ring current as measured by D{sub ST}. These enhancements decay over less than 30 days. There is evidence of a magnetospheric electron and ion acceleration mechanism of considerable strength and efficiency. Very intense periods of activity can lead to the creation of an additional, high-energy belt in the slot region, which persists over a a period of many months. 11 refs., 1 fig.
- OSTI ID:
- 123333
- Journal Information:
- Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 14 Vol. 22; ISSN GPRLAJ; ISSN 0094-8276
- Country of Publication:
- United States
- Language:
- English
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