The Alaska Volcano Observatory (AVO) responded to eruptions, possible eruptions, and volcanic unrest at or near three separate volcanic centers in Alaska during 2011. The year was highlighted by the unrest and eruption of Cleveland Volcano in the central
McGimsey, Robert G. mcgimsey@usgs.gov,Maharrey, J. Zebulon,Neal, Christina A.. 2011 volcanic activity in Alaska: summary of events and response of the Alaska Volcano Observatory. 2014-01-01.