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Tuesday, January 27, 2009

Alaska Volcano Observatory Places Mount Redoubt Under Orange Alert

Here is the latest:

- Status Report

Unrest at Redoubt Volcano continues. Seismicity at stations closest to the volcano's summit has declined somewhat starting at about 4:00 AKT this morning, but remains well above background levels.

Nothing unusual has been seen over the past 24 hours in clear to partly cloudy satellite views. AVO conducted an overflight of the volcano yesterday afternoon, and observations confirm that an eruption has not occurred. Increased steaming through previously observed sources in the snow and ice cover were seen and sulfur gas emissions were noted. There was no significant disruption of the glacial ice, nor any apparent increased water discharge down the Drift River. A gas-measurement flight to the volcano is underway today.

The current activity at Redoubt could be precursory to an eruption, perhaps within days. A further increase in seismicity is expected to accompany an eruption. Staff are currently monitoring the volcano 24 hours a day.

Beginning at 00:58 AST (9:58 UTC) yesterday morning, nearly continuous volcanic tremor was recorded at stations near Redoubt's summit, prompting AVO to raise the Aviation Color Code to ORANGE and the Alert Level to WATCH at 02:09 AST (11:09 UTC). AVO had raised the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY on November 5, 2008, in response to increased emissions of volcanic gases; melting of snow and ice near the volcano’s summit; and a subtle increase in seismicity.

Source: Alaska Volcano Observatory, where you can view a live webcam of the volcano and browse through reports on other volcanoes in the state.

**01-30-2009** Due to increased webtraffic, the previous link has died. Here are a couple of alternate links KTUU-TV and Anchorage Daily News volcano section, and this article from Alaska Dispatch.[--TP] I'm guessing all the renewed Internet traffic has overwhelmed the servers in Alaska like happened when McCain picked Governor Palin to be his running mate.

Related: Google Map of Volcano
Related: Wikipedia Article

On the right is a photo from Wikipedia of the 1989-1990 eruption of Mount Redoubt.