Hello John - We don't really use the terms "active" and "inactive" - but rather group them by last known eruptive activity. So we have 52 historically active volcanoes, about 100 volcanoes that have been active in the last 10,000 years (notably, Fourpeaked used to be in this group but moved to the historically active group in 2006 - some volcanoes can have a very long repose time), and about 150 volcanoes active in the last two million years. AVO does not keep track of those volcanic features in Alaska that are even older. The 52 historically active volcanoes are shown on this map: http://www.dggs.alaska.gov/pubs/id/20181 All of the volcanoes younger than the last two million years are shown here: https://www.avo.alaska.edu/volcanoes/ As you can see, depicting them all on one map is a challenging layout task. There are zoomed in index maps for many individual volcanoes, like this one: https://www.avo.alaska.edu/images/image.php?id=15524 Hope this is somewhat helpful, Cheryl -------- John Saul wrote: Can you supply a map showing how the active volcanic chain of the Aleutians continues as active and inactive volcanoes on the mainland? If so, if and how should it be credited if reproduced? -- Cheryl Cameron Geologist, Alaska Volcano Observatory Alaska Division of Geological & Geophysical Surveys voice: 907-451-5012 fax: 907-451-5050