Auroral proton and electron signatures in the dayside aurora

Pulsed proton events (PPEs) were observed in the dayside aurora over Svalba rd, December 10, 1997. Ground-based optical instruments together with satel lite instrumentation are used to categorize dayside optical signatures in t he time period 0500 UT to 1100 UT (0819-1410 MLT). We find it useful to sep arate the events into two main regions: regions 1 and 2. Region 1 is the au roral oval containing boundary plasma sheath (BPS) and low-latitude boundar y layer (LLBL)/cusp activities. Region 2 is equatorward of that, with a dri zzle of energetic electrons from the central plasma sheath (CPS), producing a green glow. Within region I a well-defined transition from intense green to red-dominated auroral activity is taken as a signature of the transitio n between BPS and LLBL. The hydrogen emissions are seen to be associated wi th both BPS and LLBL. Major PPEs are uniquely related to moving auroral for ms identified LLBL/cusp field Lines and are likely stimulated by pulsed rec onnection events.