Solar and Magnetic Declination Control of the Pre-Reversal Enhancement in the Equatorial E- and F-Region Electric Fields
P. Muralikrishna, I.S. Batista and M.A. Abdu
Event name: 2nd International Congress of the Brazilian Geophysical Society
Session: Space and Atmospheric Geophysics
Publication date: 28 October 1991
Info: Extended abstract, PDF ( 218.35Kb )
The horizontal drift velocity of electrons in the E- region, and their vertical drift velocity in the F- region show regular enhancements prior to their morning and evening reversals, in the equatorial ionosphere. These enhancements are more pronounced in the evening than in the morning and also show significant seasonal variations. The influence of solar and magnetic declination angles on the electrical coupling of non-equatorial E and F- regions being responsible, at least partly, for these observations, is discussed here. Possible future observations, that can conclusively establish this hypothesis are also suggested.