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07:00: Signal amplitudes on flank stations decrease slightly while amplitude on summit station increases slightly.
10:13: Onset of eruption heralded by strong tremor.
10:15: First major explosive event; plume to 10+ km; ash to NE; debris flows and floods.
10:16: Pilot report of ash and steam plume to 25,000 ft.
10:20: Pilot report of plume to 33,000 ft, moving NE.
10:21: Pilot report of plume to 35,000 ft.
11:30: FAA report of leading edge of plume passing over Anchorage.
11:40 Ashfall at Big Rivers Lake Lodge 25 miles NE of Redoubt for about 35 minutes--fine ash and pumice fragments 1-2 cm in length.
11:45: Ash fall reported at Mt. Susitna, Beluga Power and areas west of Anchorage.
17:00: Last crew evacuates from Drift River Oil Facility (DROF); no reports of flooding during day. Estimated snow depth near terminus of Drift glacier is about 3 feet. DROF crews return on 12/27 at 1000.
19:15 - 22:45: Two bursts of seismic activity occurred, each lasting about 1 hour; there were no known ash plumes reported during these events.