Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1765358 | Advances in Space Research | 2012 | 9 Pages |
Abstract
This study reports on ionospheric disturbances that occurred in the early morning hours in the South American-Atlantic sector during a few intense/super storm events. The events were observed at latitudes close to the southern crest of the equatorial ionization anomaly (EIA) as an unusual intensification of the F region electron density peak at local times when the EIA is not usually developed. All the events were observed at pre dawn-morning hours, under conditions of northward interplanetary geomagnetic field. Large scale traveling ionospheric disturbances that are launched during highly disturbed conditions and/or equatorward surges in the thermospheric meridional winds seem to be the most probable causes of the observed disturbances.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
I.S. Batista, M.A. Abdu, Paulo A.B. Nogueira, R.R. Paes, J.R. de Souza, B.W. Reinisch, V.H. Rios,