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| Titel |
Magnetic flux transfer in the 5 April 2010 Galaxy 15 substorm: an unprecedented observation |
| VerfasserIn |
M. Connors, C. T. Russell, V. Angelopoulos |
| 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 ; 29, no. 3 ; Nr. 29, no. 3 (2011-03-30), S.619-622 |
| Datensatznummer |
250016997
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| Publikation (Nr.) |
 copernicus.org/angeo-29-619-2011.pdf |
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| Zusammenfassung |
| At approximately 08:25 UT on 5 April 2010, a CME-driven shock compressed
Earth's magnetosphere and applied about 15 nT of southward IMF for nearly an
hour. A substorm growth phase and localized dipolarization at 08:47 UT were
followed by large dipolarizations at 09:03 UT and 09:08 UT, observed by GOES
West (11) in the midnight sector, and by three THEMIS spacecraft near X=−11,
Y=−2 RE. A large electric field at the THEMIS spacecraft indicates so
much flux transfer to the inner magnetosphere that "overdipolarization" took
place at GOES 11. This transfer is consistent with the ground and space
magnetic signature of the substorm current wedge. Significant particle
injections were also observed. The ensemble of extreme geophysical
conditions, never previously observed, is consistent with the Near-Earth
Neutral Line interpretation of substorms, and subjected the Galaxy 15
geosynchronous satellite to space weather conditions which appear to have
induced a major operational anomaly. |
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