MASSIVE ENERGY FLOW. “The tail field reconfiguration is also associated with strong field-aligned currents to and from the ionosphere, which in part contribute to the energy dissipation in the ionosphere. Thus, the large-scale current disruption, configuration change, and field reconfiguration all are associated with a major energy dissipation process in the magnetosphere.”
https://link.springer.com/article/10.12942/lrsp-2007-1