Abstract
F-region effects following two severe magnetic storms over Delhi are studied with N( h) profiles deduced from C4 ionograms. The major effects are a reduction in the electron density at heights above 200 km, and a considerable increase in the height of the maximum electron density, h m F2, during the night; there being little or no change in h m F2 during the sunlit hours. The effects are examined with the help of a parameter R 0, which is the ratio of the loss coefficient, β and the vertical transport velocity, w. The parameter R 0 is found to increase considerably on the storm nights. This increase is concluded as an increase in the loss coefficient and a decrease in the transport velocity. Further analysis of R 0 indicates that the transport velocity decreases with height on storm nights in contrast to an increase with height on quiet nights.
Published Version
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