Abstract
We simulated the Nov 4, 2021 geomagnetic storm event penetrating
electric field using the Multiscale Atmosphere-Geospace Environment
(MAGE) and compared with the NASA ICON observation. The ICON observation
showed enhancement of the vertical ion drift when the penetrating
electric field arrived at the equatorial region. The simulated vertical
ion drifts are consistent with ICON observation. Hence, we are able to
verify the MAGE simulation with ICON observation. On the dusk side, the
MAGE simulation showed strong pre-reversal enhancement (PRE), whereas
the ICON observation did not display any sign of the PRE. The MAGE
simulation did show that PRE amplitude decreases as altitude increase.
Because the ICON orbital height is above the model upper boundary, it
could be a factor for the discrepancy. Instrumental issue cannot be
ruled out at this moment. GOLD UV image at the same time exhibits
multiple plasma bubbles, which seem to suggest the existence of the PRE.