U.S. Volcano Information

Redoubt Volcano viewed from the northwest following the April 4, 2009 eruption (Event 19). Steam rises from the summit crater, p
March 7, 2016

There are 169 potentially active volcanoes in the U.S., and the USGS Volcano Hazards Program provides warnings of unrest and eruption for these volcanoes. We offer volcano monitoring data, provide maps and geologic information, conduct research how volcanoes work, and engage with community education and outreach.