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| Titel |
The storm-time ring current: a statistical analysis at two widely separated low-latitude stations |
| VerfasserIn |
P. Francia, U. Villante, N. Adorante, W. D. Gonzalez |
| 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 ; 22, no. 10 ; Nr. 22, no. 10 (2004-11-03), S.3699-3705 |
| Datensatznummer |
250015041
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| Publikation (Nr.) |
 copernicus.org/angeo-22-3699-2004.pdf |
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| Zusammenfassung |
| We conducted a statistical analysis of the geomagnetic field variations
during the storm main phase at two low-latitude stations, separated by
several hours in magnetic local time, in order to investigate the asymmetry
and longitudinal extent of the storm-time ring current. The results show
evidence for an asymmetric current which typically extends from evening to
noon and, during moderate solar wind electric field conditions, up to the
early morning, confirming the important role of the magnetospheric
convection in the ring current energization. We also analyzed a possible
relationship between the local current intensity during the storm main phase
and the substorm activity observed at different time delays τ with
respect to the storm onset. The results show a significant anticorrelation
for τ =-1h, indicating that if the substorm activity is high just
before the storm, a weaker ring current develops. |
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