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| Titel |
An analysis of geomagnetic field variations (3 min-2 h) at a low-latitude observatory (L=1.6) |
| VerfasserIn |
P. Francia, U. Villante, A. Meloni |
| 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 ; 13, no. 5 ; Nr. 13, no. 5, S.522-531 |
| Datensatznummer |
250011850
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| Publikation (Nr.) |
 copernicus.org/angeo-13-522-1995.pdf |
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| Zusammenfassung |
| An analysis of the geomagnetic field
variations between 3 min and 2 h at L'Aquila (L=1.6) shows that the power
level in the low-frequency range (i.e. for periods longer than approximately 10
min) at solar maximum (1989/90) is much higher than at solar minimum (1985/86).
Conversely, at solar minimum, it emerges that there is a greater relative
importance of fluctuations with periods smaller than 10 min which might be
related to the greater percentage of solar wind speeds greater than
approximately 540 km s–1. Diurnal, seasonal and solar cycle
variations of both the high- and the low-frequency power are also discussed. We
found that several aspects of these variations might be correlated with
ionospheric features such as the ionisation of the F2 layer and the
location and the intensity of the S current system. |
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