Alaska Volcano Observatory (AVO) downgraded Cleveland Volcano to Yellow (alert)status today, as the eruption has ground to a halt. The latest activity consisted of slow lava dome extrusion at the summit. No explosive eruptions occurred during this period.
AVO states that activity could resume at any time, and that a collapse of the lava dome could produce avalanches or ash.
Cleveland Volcano is one of the most active in the Aleutian Islands and has erupted plenty of times in recent history. This volcano, due to its remoteness and other factors such as weather and the vastness of the Alaskan islands, does not have a seismic monitoring station, and reports from the area are hard to come by. AVO relies on satellite monitoring and anecdotal evidence to monitor the volcano.
The Aleutian Islands are one of the most volcanically active areas in the United States, aside from the big island of Hawaii, and the Cascades, which have not seen any real eruptive activity since the explosion of Mt. St. Helens in 1980.
You can always check the status of volcanoes in Alaska and the Russian Kamchatka Peninsula at http://avo.alaska.edu.
Friday, November 4, 2011
AVO Downgrades Cleveland Volcano Alert Status to Yellow
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