Enhanced waves in these regions could play a major role in electron acceleration to relativistic energies during periods of prolonged substorm activity.
electrojet activity shifts with the auroral oval to lower latitudes during the substorm growth phase.
The main purpose is finding the forerunners of the substorm disturbances and a possible prediction of these disturbances.
It seems possible that both originate in the thin current sheet that occurs in the magnetotail at substorm onset.
Evidence for enhanced substorm activity and whistler mode chorus associated with electron acceleration to relativistic energies.