Abstract
It is known that equatorial sporadic E disappears at night when dynamo field is east to west. During some DP2 type magnetic sub-storms, which cause a depression of the geomagnetic horizontal field at the equator, theq type of sporadic E is found to disappear at the equatorial stations Huancayo and Kodaikanal. This suggests that one of the mechanisms causing the temporary disappearance of E s —q during daytime in equatorial ionograms is the replacement of the east to west dynamo electric field by a west to east electric field due to the imposition of an electric field opposing the normal daytime S q field.
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(Communicated by Professor K. R. Ramanathan,f.a.sc.)
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Rastogi, R.G. The effect of polar magnetic sub-storms on the equatorial sporadic E. Proc. Indian Acad. Sci. 77, 130–138 (1973). https://doi.org/10.1007/BF03049514
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DOI: https://doi.org/10.1007/BF03049514