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Alert levels lowered again at Redoubt 18 March 2009

Posted by admin in activity reports, Alaska, Redoubt, United States.
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The Alaska Volcano Observatory has, within the last hour, lowered the aviation colour code to Yellow and the alert level to Advisory for Mount Redoubt. The AVO statement announcing the change, issued at 1741 GMT today, can be found here.

In its ‘volcanic activity summary’ section, the AVO statement explains that since the 15 March eruption/explosion/event (which is here called a ‘steam and ash emission’), seismicity has returned to prior low levels, there have been no additional emissions, and ‘The new magma beneath the volcano does not show signs of upward movement at this time’. The volcanic activity summary concludes as follows:

The volcano remains restless with abnormally high rates of gas emission and continued melting of the summit glacier. It is still possible for the current period of unrest to result in an eruption. However, the type of unrest we have observed so far could persist for many months to a year or more and not lead to an eruption. It is possible for conditions at the volcano to change rapidly, advancing from relatively low levels of activity to eruption in time periods as short as 24 hours or less.

For all our Redoubt coverage: Redoubt « The Volcanism Blog.

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