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| Titel |
A case study of a radially polarized Pc4 event observed by the Equator-S satellite |
| VerfasserIn |
R. Cramm, K. H. Glassmeier, C. Othmer, K. H. Fornacon, H. U. Auster, W. Baumjohann, E. Georgescu |
| 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 ; 18, no. 4 ; Nr. 18, no. 4, S.411-415 |
| Datensatznummer |
250013952
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| Publikation (Nr.) |
 copernicus.org/angeo-18-411-2000.pdf |
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| Zusammenfassung |
A 16 mHz Pc4 pulsation was recorded on March
17, 1998, in the prenoon sector of the Earth's magnetosphere by the Equator-S
satellite. The event is strongly localized in radial direction at approximately L
= 5 and exhibits properties of a field line resonance such as an ellipticity
change as seen by applying the method of the analytical signal to the magnetic
field data. The azimuthal wave number was estimated as m \approx 150. We
discuss whether this event can be explained by the FLR mechanism and find out
that the change in ellipticity is more a general feature of a localized Alfvén
wave than indicative of a resonant process.
Key words: Magnetospheric physics (MHD waves and
instabilities) |
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