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| Titel |
Luminosity variations in several parallel auroral arcs before auroral breakup |
| VerfasserIn |
V. Safargaleev, W. Lyatsky, V. Tagirov |
| 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 ; 15, no. 8 ; Nr. 15, no. 8, S.959-966 |
| Datensatznummer |
250012904
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| Publikation (Nr.) |
 copernicus.org/angeo-15-959-1997.pdf |
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| Zusammenfassung |
| Variation of the luminosity in two parallel
auroral arcs before auroral breakup has been studied by using digitised TV-data
with high temporal and spatial resolution. The intervals when a new arc appears
near already existing one were chosen for analysis. It is shown, for all cases,
that the appearance of a new arc is accompanied by fading or disappearance of
another arc. We have named these events out-of-phase events, OP. Another type of
luminosity variation is characterised by almost simultaneous enhancement of
intensity in the both arcs (in-phase event, IP). The characteristic time of IP
events is 10–20 s, whereas OP events last about one minute. Sometimes
out-of-phase events begin as IP events. The possible mechanisms for OP and IP
events are discussed. |
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