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| Titel |
Storm-time response of the Van Allen radiation belts organized by the large-scale solar wind drivers, energy and distance |
| VerfasserIn |
Heli Hietala, Emilia Kilpua, Drew Turner |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250130840
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| Publikation (Nr.) |
 EGU/EGU2016-11158.pdf |
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| Zusammenfassung |
| We study the response of the Van Allen radiation belts during geomagnetic storms. A combination of the long-term geosynchronous observations from GOES (> 2.5 MeV) and energy (tens of keV to 2 MeV) and L-shell (2.5 < L < 6.0) resolved Van Allen Probe observations are used. We demonstrate that the radiation belt response (depletion, no-change, increase) is organized by the large-scale solar wind driver (coronal mass ejection ejecta/sheath, slow-fast stream interface region, fast stream) and that the response is highly dependent on both the electron energy and the L-shell.
In addition, we show detailed Van Allen Probe observations from two geomagnetic storms that occurred during two consecutive Carrington rotations of the solar maximum year 2015. Both of these storms involved a slow-fast stream interaction region and a fast stream originating from the same coronal hole. However, the first storm also included a large-scale coronal mass ejection. We study in particular how the added presence of this coronal mass ejection affected the dynamics of the radiation belts. |
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