IMAGE Discovers Proton Aurora in Cusp.

IMAGE sees protons flowing into the magnetospheric 'cusp' after magnetic field lines from the magnetotail begin to reconnect. This also means that during these times, protons may make a large contribution to the way that energy is deposited into the cusp region.

(2001: H.U. Frey, S.B. Mende, T.J. Immel, S.A. Fuselier, E.S. Clafin, J.-C. Gerard, and B. Huber)