Information about Oregon's volcanic hazards from the Oregon Department of Geology and Mineral Industries (DOGAMI).
Volcano information from the Federal Emergency Management Agency (FEMA).
Volcano infromation from the Cascades Volcano Observatory operated by the U.S. Geological Survey in Vancouver, WA.
Information about volcanoes in the Portland area from the U.S. Geological Survey.
Volcano information and activity alerts from the U.S. Geological Survey.