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Effect of interplanetary magnetic field on ionosphere over the magnetic equatorLarge and quick changes of the latitude of the interplanetary magnetic field from its southward to northward direction are shown to be associated with the disappearance of the Es-q layer (Knecht, 1959) at the equatorial ionosphere during the daytime or with the reversal of E region horizontal and F region vertical electron drifts during both night and day. This phenomenon is suggested as the imposition of an electric field in the ionosphere in a direction opposite to that of the Sq electric field. The resultant electrostatic field on the equatorial ionosphere would be decreased or even reversed from its normal direction, resulting in the reduction of electron drift velocity. When the normal Sq field is over-compensated by the magnetospheric electric field, the electron drifts are reversed and the irregularities in the E region due to the cross-field instabilities are inhibited, resulting in the sudden disappearance of the Es-q layers.
Document ID
19760040203
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rastogi, R. G.
(Physical Research Laboratory Ahmedabad, India)
Patel, V. L.
(Physical Research Laboratory, Ahmedabad, India; Denver, University Denver, Colo., United States)
Date Acquired
August 8, 2013
Publication Date
October 1, 1975
Subject Category
Geophysics
Accession Number
76A23169
Funding Number(s)
CONTRACT_GRANT: NGR-06-004-058
Distribution Limits
Public
Copyright
Other

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