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Unrest at Alaska’s Redoubt 26 January 2009

Posted by admin in activity reports, Alaska, Redoubt, United States.
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The Alaska Volcano Observatory increased the Aviation Color Code for Mt Redoubt to orange and the Alert Level to watch on 25 January 2009 following an overflight. Seismicity is well above background levels and volcanic tremor has been recorded at stations near the volcano’s summit. There has been no eruption, but steaming and elevated sulphur emissions have been observed. In its most recent bulletin on Redoubt the AVO reports:

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

Redoubt’s activity has been on an upswing since the latter part of last year, when snowcap melting, increased gas emissions and elevated seismicity were observed. Redoubt is one of Alaska’s most active volcanoes; the most recent eruption in 1989-90 brought evacuations, property damage and extensive economic disruption to the Cook Inlet area.

Mount Redoubt rumbles: eruption possibleAnchorage Daily News, 25 January 2009

Global Volcanism Program: Redoubt – summary information for Redoubt (1103-03-)
Alaska Volcano Observatory – Redoubt – AVO information and updates for Redoubt
Alaska Volcano Observatory – main page for the AVO

The Volcanism Blog