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| Titel |
Quasi-periodic precipitation with periods between 40 and 60 minutes |
| VerfasserIn |
K. Rinnert |
| 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 ; 14, no. 7 ; Nr. 14, no. 7, S.707-715 |
| Datensatznummer |
250012352
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| Publikation (Nr.) |
 copernicus.org/angeo-14-707-1996.pdf |
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| Zusammenfassung |
| Intervals of periodic enhancements of
E-region electron density have been found in EISCAT (European Incoherent SCATter)
data. The periods are typically between 40 and 60 min. The phenomenon is
observed during relatively quiet times, though after geomagnetic disturbances;
it may last up to 6 h. The events can occur at all times of day with a maximum
probability in the MLT morning sector. Using the EISCAT database from recent
years, the statistical characteristics of these events, and their relation to
magnetospheric conditions defined by the Dst index and the d.c. electric field
perpendicular to B\= have been derived. The latitudinal extent is found to be
several degrees, but the longitudinal extent is not known. It is concluded that
these events are due to the periodically modulated flux of electron
precipitation controlled by oscillations in the magnetospheric tail. |
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