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| Titel |
Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere |
| VerfasserIn |
G. I. Korotova, D. G. Sibeck, H. J. Singer, T. J. Rosenberg, M. J. Engebretson |
| 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 ; 22, no. 12 ; Nr. 22, no. 12 (2004-12-22), S.4197-4202 |
| Datensatznummer |
250015084
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| Publikation (Nr.) |
 copernicus.org/angeo-22-4197-2004.pdf |
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| Zusammenfassung |
The pressure pulse model for dayside transient ionospheric
events predicts dawnward moving events at and prior to local noon during
periods of spiral interplanetary magnetic field (IMF) orientation, but
duskward moving events at and after local noon during rarer periods of
orthospiral IMF orientation. We use this model to interpret ground and
geosynchronous magnetometer observations of a duskward-moving transient
event that occurred on 10 August 1995 during a period of orthospiral IMF
orientation. We then survey geosynchronous GOES-8, 9, and 10 magnetometer
observations to determine the directions of motion for 67 isolated magnetic
impulse events seen in South Pole magnetograms from 1995-1999. The
occurrence patterns and directions of motion inferred from both case and
statistical studies are consistent with pressure pulse model predictions.
Key words. Interplanetary physics (Interplanetary magnetic
fields; discontinuities) – Magnetospheric physics
(Magnetosphere-ionosphere interactions) |
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