2009 VOLCANIC ACTIVITY IN ALASKA, KAMCHATKA, AND THE KURILE ISLANDS - SUMMARY OF EVENTS AND RESPONSE OF THE ALASKA VOLCANO OBSERVATORY
McGimsey, R.G., Neal, C.A., Girina, O.A., Chibisova, Marina, and Rybin, Alexander, 2014, 2009 Volcanic activity in Alaska, Kamchatka, and the Kurile Islands - summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2013-5213, 125 p., http://pubs.usgs.gov/sir/2013/5213/ .
link to USGS website with PDF