THE NITTY-GRITTY: A scanning electron microscope image (magnified 1,200 times) of an ash flake that fell in Healy, Alaska, about 200 miles (320 kilometers) north of Anchorage. Pavel Izbekov/Alaska Volcano Observatory/U.S. Geological Survey
ASH STASH: Research geologist Game McGimsey of the Alaska Volcano Observatory bags an ash sample Monday at a seismic station about eight miles (13 kilometers) north of Redoubt's summit. Cyrus Read/Alaska Volcano Observatory/U.S. Geological Survey
SOME THINGS EVEN BAKING SODA CAN'T CLEAN UP: Another view from the Tordrillo Mountain Lodge. Lel Tone/Alaska Volcano Observatory/U.S. Geological Survey
DRIFTS UPON DRIFTS: Ash piles on snow at the Tordrillo Mountain Lodge on the Talachulitna River, north of the volcano. Lel Tone/Alaska Volcano Observatory/U.S. Geological Survey
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EXFOLIATION: In the lower end of the Drift Valley, tree trunks were abraded by the floods as high as six feet (two meters). Game McGimsey/Alaska Volcano Observatory/U.S. Geological Survey
PUDDLE OF MUD: The Drift Valley experienced floodwaters of about 20 to 25 feet (six to 7.5 meters) in height from the eruption of Mount Redoubt, according to the Alaska Volcano Observatory. Game McGimsey/Alaska Volcano Observatory/U.S. Geological Survey
ASHFALLS: A waterfall tumbles down the base of Drift Glacier. Cyrus Read/Alaska Volcano Observatory/U.S. Geological Survey
BLACK AND WHITE: Waterfalls course through the snowy Drift Glacier. Cyrus Read/Alaska Volcano Observatory/U.S. Geological Survey
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MUDDY WATERS: A black river pours through the Drift Glacier, below the peak of Mount Redoubt. Game McGimsey/Alaska Volcano Observatory/U.S. Geological Survey
![Fallout from Alaska's Mount Redoubt [Slide Show]](https://static.scientificamerican.com/sciam/cache/file/590E7C4F-5B62-4354-B7B22438B3914E5C.jpg?w=590&h=393)