Mount Redoubt, an active volcano in the Aleutian chain about 100 miles southwest of Anchorage, Alaska, erupted last night, sending a plume of ash 50,000 feet into the air. Watts Up With That? has <a href=”http://wattsupwiththat.com/2009/03/23/mt-redoubt-in-alaska-erupts/-6481″>more. Below, the Redoubt eruption from April 1990.