Ionospheric Electrodynamics
Polar Cap Boundary and Electric Potential
SWMF ionospheric potential with polar cap
Polar Cap Boundary and Field-Aligned Currents
SWMF ionospheric FAC with polar cap
Cross Polar Cap Potential
Difference History

 week's worth of electric potential differences

Models: Space Weather Modeling Framework, SWMF
(Gombosi et al., CSEM)