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| Titel |
Letter to the Editor: Geomagnetic storm effects at low latitudes |
| VerfasserIn |
R. G. Rastogi |
| 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 ; 17, no. 3 ; Nr. 17, no. 3, S.438-441 |
| Datensatznummer |
250013699
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| Publikation (Nr.) |
 copernicus.org/angeo-17-438-1999.pdf |
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| Zusammenfassung |
The geomagnetic horizontal (H) field from the
chain of nine observatories in India are used to study the storm-time and
disturbance daily variations. The peak decrease in storm-time variation in H
showed significant enhancements at the equatorial electrojet stations over and
above the normally expected decrease due to the ring current effects corrected
for geomagnetic latitudes. The disturbance daily variation of H at equatorial
stations showed a large decrease around midday hours over and above the usual
dawn-maximum and dusk-minimum seen at any mid-latitude stations around the
world. These slow and persistent additional decreases of H of disturbance daily
variation at equatorial latitudes could be the effect of a westward electric
field due to the Disturbance Ionospheric dynamo coupled with abnormally large
electrical conductivities in the E region over the equator.
Key words. Ionosphere (electric fields and currents) ·
Magnetospheric physics (electric fields; storms and substorms) |
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