Quantitative information on auroral electron precipitation is needed to evaluate the effects of the precipitation on the ionosphere and upper atmosphere. In this paper we present such information for the mormingside aurora. We use simultaneous observations of precipitating electrons and auroral images from the low-altitude, polar-orbiting DMSP-F6 satellite, and we relate specific precipitation features to specific types of auroras. We find the equatorward region of diffuse aurora to have precipitating electron energy fluxes, ϵp, which typically reach 10 ergs/cm2 s, and such fluxes can extend over several degrees in latitude. Energy spectra over the diffuse aurora are quite hard and show no evidence of acceleration by a field-aligned potential drop, V∥. The poleward region of structured aurora includes a soft background of relatively weak, uniform precipitation. Arclike structured precipitation results from variable V∥ acceleration of this background. Over the arcs, ϵp can exceed 1 erg/cm2 s.

Bursts of precipitation at energies above a few keV are identifiable in the data equatorward of the peak in the diffuse auroral precipitation. We believe these bursts are associated with pulsating auroral patches. Omega band waves are occasionally observed along the poleward boundary of the diffuse aurora. Electron spectra over the omega bands are unique for the morningside. The spectra show hard precipitation as observed within the diffuse region. In addition, the spectra have a peak at energies generally ≲1 keV indicative of acceleration by a V∥≲1 keV.