“…Multiple vigorous curtains of pulsating aurora, fringed with delicate violet outer edges, spread out into an auroral corona overhead and danced across Alaskan skies directly above the northern Kenai Mountains.  The grand display rose abruptly in the east, covered the night in vibrating sheets within seconds, then moved across to the western horizon and dissipated into a few ghostly forms.  These spectacular events in auroral formation are rapid impulses and have been measured with horizontal movements exceeding 100 km/second…”