Storm-time Ionospheric Electrodynamics During the September 7-9, 2017 Geomagnetic Storm
Abstract
Among the observed ionospheric consequences of the storm-time electrodynamics are dramatic redistributions of the electron densities at all latitudes and occurrence of spread-F type instabilities at mid to low latitudes. We use the SAMI3/RCM first-principles numerical model to simulate ionospheric electrodynamics in response to penetration electric fields of magnetospheric origin during the geomagnetic storm of September 7-9, 2017. Simulation results will be compared to multi-instrument observations of the ionospheric F-region densities made by the FPMU instrument suite (on board the International Space Station) and by the SWARM spacecraft, global maps of the total electron content (TEC) derived from ground-based GNSS receivers, electron density and F-region ExB drift velocities measured by the Jicamarca and the Millstone Hill incoherent scatter radars, and topside plasma densities and drift velocities by the DMSP spacecraft. We will characterize the longitudinal dependence of storm-time electric fields and role of the Interplanetary Magnetic Field (IMF) y-component and rotations of IMF vector on penetration electric fields.
- Publication:
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43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E.601S