Cascades Volcano Observatory
USGS provides information about Mount St. Helens current and past activity as well as monitoring the other volcanoes of the Cascade Range.
Hawaiian Volcano Observatory
Features information about Kilauea, Mauna Loa, and other volcanoes in the Hawaiian Islands, eruption reports, Volcano Watch articles, earthquakes, types of volcanic hazards, and more.
U.S. Geological Survey Volcano Hazards Program
See the latest U.S. volcano alerts and updates. Also learn about the challenges, work, and accomplishments of the scientists who strive to reduce the risk from volcano hazards in the United States and abroad.