Photo of Historically active volcanoes of Alaska reference deck, Information Circular 59 v.2. Each full-color card provides the location and photo of a historically active volcano and up to four icons describing its historical activity. The icons represent characteristics of the volcano, such as a documented eruption, fumaroles, deformation, or earthquake swarms; a legend card is provided. More information about this publication available here: http://dggs.alaska.gov/pubs/id/29738
Credit: Image courtesy of the ADGGS.