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|Title:||Low Latitude F-Region Anomalies & the Equatorial Electric Field|
Rastogi, R. G.
|Abstract:||A study is made of the profiles of the electron density distribution at the equator during days of strong and weak equatorial electric field. The diurnal and latitudinal variations of the F-region ionization at low-latitudes are shown to be closely associated with the east-west electric field over the magnetic equator. In extreme cases of reversal of the geomagnetic field H at the equator for a few hours around noon, the F. region Appleton anomaly itself is found to be reversed. A study of the electron density distributions made on such days shows larger ionization at the equator than at a station at 30o dip which normally is an anomaly crest. Electron drift measurements at the equator show a westward electrojet at times or reversal of the geomagnetic field. The feature of a reversed F2 anomaly is explained in terms of a downward E x B drift at the equator.|
|ISSN:||0975-105X (Online); 0367-8393 (Print)|
|Appears in Collections:||IJRSP Vol.03(4) [December 1974]|
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