Physics
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsa31a..08z&link_type=abstract
American Geophysical Union, Spring Meeting 2007, abstract #SA31A-08
Physics
2400 Ionosphere (6929), 2409 Current Systems (2721), 2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2435 Ionospheric Disturbances
Scientific paper
The remarkable variations of terrestrial magnetic field and electrodynamics parameters at equator latitudes during a severe magnetic storm would be due to the magnetospheric disturbances which are connected to the ionosphere of high latitudes. The ionosonde data and the magnetic data recorded at Korhogo (9.34° N; 5.43° W) are used to characterize the disturbances observed in the equatorial region following the mechanism of direct penetration of magnetospheric convection electric field from high latitudes to the equator during the magnetic storm of November 18, 1993. The H component of the magnetic field for the disturbed day was compared to quiet day used as reference day. The electrodynamics parameters are obtained by inverting the ionograms with the NHPC code program (Reinish, 1996). The variation of the H component of magnetic fields during the disturbed day shows a negative deflection (different from the variation of quiet day) which lasts approximately 3 hours (1600 - 1900) and represents a westward disturbance of the zonal electric field. That corresponds to the inversion of the equatorial electrojet current during a time period of 3 hours attesting the direct penetration of the magnetospheric electric field from high latitudes towards the magnetic equator. The analysis of the electrodynamic parameters at equatorial latitudes shows an increase of F2 region electron density during this event simultaneously to an inversion of the vertical drift which flows downward for this time interval (1600 - 1900). The event is followed by a resurgence and intensification of the eastward zonal electric field and thus the re- establishment of the eastward normal electrojet current as a result of the reinforcement of the upward vertical drift simultaneously to a fall of F2 layer electronic density.
Kobea A. T.
Obrou O. K.
Zaka K. Z.
No associations
LandOfFree
Characterization of the Direct Penetration of Magnetospheric Electric Field Convection at the Equator does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Characterization of the Direct Penetration of Magnetospheric Electric Field Convection at the Equator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Characterization of the Direct Penetration of Magnetospheric Electric Field Convection at the Equator will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1036461