Recent Volcanic Activity - The Big Picture - Boston.com

Recent Volcanic Activity - The Big Picture - Boston.com: "Several volcanoes have erupted in the past few months - two in Chile (Chaiten and Llaima) and one in Alaska (Okmok). At any given time, approximately 20 to 50 volcanoes are active worldwide (depending on the definition of 'active'). Collected here are photos of volcanic events from the the past several years, seen from many angles, including low Earth Orbit. (15 photos total)"