Effects of Subauroral Polarization Streams on the Equatorial Electrojet During the Geomagnetic Storm on June 1, 2013

In this study, the effect of disturbance dynamo electric field (DDEF) induced by subauroral polarization streams (SAPS) on variations equatorial electrojet (EEJ) and its counter (CEJ) during geomagnetic storm June 1, 2013 is analyzed in detail for first time. Observations from ground-based magnetometers showed that SAPS-induced EEJ flows westward eastward daytime dawn/dusk sectors, respectively. The effects SAPS are mainly associated with changes zonal ionospheric field, while conductivity play a secondary role. By using Thermosphere Ionosphere Electrodynamic General Circulation Model simulations, DDEF examined. results simulations show has significant impact variability. at dip equator driven wind, contributions meridional wind. A similar mechanism can be observed sector when produced; however, it much weaker intensity than daytime.