Posted by CypressTX on 3/28/2009, 2:05 pm, in reply to "Explosion at 1:35Z, Ash Cloud at 40K-Ft"

http://www.adn.com/volcano/story/738389.html exerpts: "If history is a guide, the last eruption at Redoubt -- from December 1989 to April 1990 -- lasted four months and generated 23 distinct eruptions, according to U.S. Geological Survey records." "By comparison, Redoubt's current eruptive episode is less than a week old, and it would have to continue through half the summer to match the 1989-1990 eruption in terms of duration. At the same time, it's already generated 13 distinct eruptions, and at that rate it could match its previous mark in just one more week." "Below the summit, however, Waythomas and others discovered that heat from the volcano has already melted or evaporated away about one-fifth of the Drift Glacier. That's nearly commensurate with the "cubic kilometer ... about one-fourth of the glacier" that was lost to melting 20 years ago, Waythomas said. "So perhaps this eruption is not going to follow that (1989-90) script," he said. "It's still too early to tell.""