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| Titel |
Association of cusp energetic ions with geomagnetic storms and substorms |
| VerfasserIn |
J. T. Niehof, S. K. Morley, R. H. W. Friedel |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 30, no. 12 ; Nr. 30, no. 12 (2012-12-06), S.1633-1643 |
| Datensatznummer |
250017290
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| Publikation (Nr.) |
 copernicus.org/angeo-30-1633-2012.pdf |
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| Zusammenfassung |
| Energetic ions observed in the cusp have been explained as a result of
processes within the magnetosphere, but also proposed as a driver of
some of those same processes. This study assesses potential
connections between energetic ions observed in the cusp and
geomagnetic storm and substorm activity. These connections may suggest
sources of cusp energetic particles (CEPs), or imply effects of these
particles on magnetospheric dynamics. We identify CEPs from six years
of cusp crossings by the Polar satellite, relating them to storm and
substorm onsets. CEPs showed no significant dependence on storms but
did show a weak, statistically significant, increase after substorm
onsets. CEPs had no significant association with subsequent storm or
substorm onsets. We conclude that substorm acceleration may contribute
to CEPs but CEPs are unlikely to contribute to global magnetospheric
dynamics. |
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