Bogoslof Volcano: 31,000 feet ash cloud

An Alaska volcano active since mid-December has erupted again. Bogoslof Volcano in the Aleutian Islands erupted last week on wednesday and sent up an ash cloud estimated at 31,000 feet. The Alaska Volcano Observatory raised the aviation threat code to red, the highest level. Ash clouds higher than 20,000 feet are a threat to intercontinental jet aircraft because ash can damage engines.

 

On December 14, 1989, Redoubt volcano, also in Cook Inlet, erupted. The next day, KLM flight 867, carrying 231 passengers from Amsterdam to Tokyo with a stop in Anchorage, flew through a Redoubt ash plume, causing all four engines to fail. The aircraft dropped more than 3 km (2 mi) in altitude within five minutes before the flight crew managed to restart the engines and land the plane safely in Anchorage. All four engines on the aircraft had to be replaced, with damages totaling about $80 million. The Redoubt eruption continued through early June 1990.

Read more about Bogoslof on LA Times websie >>>>

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