BackgroundRedoubt is one of the most active and largest volcanoes in Alaska. It is a steep stratovolcano, measuring about 10 km at its base and rising to an elevation of 3108 m above sea level.
Its flanks are cut by valley created by glacial action. Redoubt has an ice filled summit crater, almost 2 km in diameter, which is breached to the north by Drift Glacier.
Redoubt volcano (Alaska): Fresh snow in the foreground strikingly contrasts with grey ash on the volcano's SE flank and peaks SE of it. (Photo: marcofulle)
See also: Sentinel hub | Landsat 8 | NASA FIRMS