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| Titel |
Pc3 pulsations during variable IMF conditions |
| VerfasserIn |
U. Villante, S. Lepidi, P. Francia, M. Vellante, A. Meloni, R. P. Lepping, F. Mariani |
| 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 ; 17, no. 4 ; Nr. 17, no. 4, S.490-496 |
| Datensatznummer |
250013710
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| Publikation (Nr.) |
 copernicus.org/angeo-17-490-1999.pdf |
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| Zusammenfassung |
Pc3 geomagnetic field fluctuations detected
at low latitude (L'Aquila, Italy) during the passage of a high velocity solar
wind stream, characterized by variable interplanetary magnetic field conditions,
are analyzed. Higher frequency resonant fluctuations and lower frequency
phenomena are simultaneously observed; the intermittent appearance and the
variable frequency of the longer period modes can be well interpreted in terms
of the variable IMF elements; moreover their polarization characteristics are
consistent with an origin related to external waves propagating in antisunward
direction. A comparison with simultaneous observations performed at Terra Nova
Bay (Antarctica) provides additional evidence for a clear relationship between
the IMF and Pc3 pulsations also at very high latitudes.
Key words. Magnetospheric physics (MHD waves and
instabilities; solar wind · magnetosphere interactions) |
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