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Title: | Solar flare effects on the geomagnetic elements during normal and counter electrojet periods |
Authors: | Rastogi, R.G. Pathan, B.M. Rao, D.R.K. Sastry, T.S. Sastri, J.H. |
Keywords: | Geomagnetic field Equatorial electrojet Solar flare effects |
Issue Date: | 1999 |
Citation: | Earth Planet Space, v.51, p.947-957, 1999, doi: 10.1186/BF03351565 |
Abstract: | The paper describes the study of solar flare effects (sfe) on horizontal (H), eastward (Y) and vertical (Z) components of the geomagnetic field at the Indo-USSR chain of magnetic observatories extending from the magnetic latitudes 0° to 45°N, a network not available any where else in the world. Events are selected when strong, normal and reversed (counter) equatorial electrojet are in existence as well as when only a partial counter electrojet is present. During a strong and normal electrojet event time, sfe consists of a positive impulse in H at all stations, the amplitude of H following the latitudinal variation similar to that of the quiet day monthly mean, Sq (H). The sfe in Y is negative at all the stations. Sfe in Z shows positive impulse at the four-electrojet stations and negative at other stations. During a counter electrojet period the effect of solar flare on H field is negative impulse at electrojet stations, positive at low latitude and again negative at stations north of Sq focus. Sfe in Y is small at all the equatorial nd negative at higher latitude stations. However, sfe (Z) is negative at the equatorial latitudes. During a partial counter electrojet period the observed effect is the combination of an increase of the planetary current component and the decrease of the electrojet component, giving rise to a negative impulse in H at equatorial stations and apositive impulse in H, increasing with increasing distance from the equator. These results are presented and discussed. |
URI: | http://localhost:8080/xmlui/handle/123456789/74 |
Appears in Collections: | ODA_Reprints |
Files in This Item:
File | Description | Size | Format | |
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PathanBM_etal_EarthPlanetsSp_1999.pdf | 963.89 kB | Adobe PDF | View/Open |
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