This United States Geological Survey (USGS) on-line publication contains details about the geologic and hydrologic hazards caused by volcanoes, specifically in the U.S. Information and details are provided about hazards such as eruption blasts, volcanic gases, lava and pyroclastic flows, volcano landslides and lahars. Full description.

This United States Geological Survey (USGS) website discusses volcano hazards by type (gas, lahars, landslides, lava flows, pyroclastic flows, and tephra) and by the effect volcanoes have on people and land. This site gives an overview of volcano hazards and links to selected case studies listed by country, volcano, year, and type of hazard. Links to more USGS information about volcanoes, such as ... Full description.

This report summarizes the Volcano Hazards Program of the United States Geological Survey (USGS). Topics include its goals and activities, some key accomplishments, and a plan for future operations. There are also discussions of active and potentially active volcanoes in the U.S., the role of the USGS volcano observatories, prediction of eruptions, and potential danger to aircraft from volcanic plumes. ... Full description.

A comprehensive overview of the U.S. Geological Survey's Volcano Hazards Program and current volcanic activity in the United States. The Volcano Hazards Program monitors volcanoes and collects the best possible scientific information on volcanoes in the United States and elsewhere to reduce the risk from volcanic activity. Site includes links to the Program's four volcano observatories in Alaska, ... Full description.

This web page describes the history and hazards related to the Mount Hood volcano in Oregon. Issues discussed include past eruptive behavior, past catastrophic events, hazardous areas and tephra hazards. Included are a block diagram of tectonic plates and a simplified volcano hazards zone map for the area around Mount Hood. Full description.

This web site is a good place to start for anyone seeking information on the geology and management of natural hazards phenomena related to volcanoes and hydrologic and geothermal processes. Some information is included on landslides, earthquakes, faults, and tsunamis. In addition to a brief definition of the terms, the site provides background information on related terms; maps, graphics and images; ... Full description.

This fact sheet provides an overview of the gases emitted by volcanoes, which consist mostly of water vapor, carbon dioxide, and sulfur dioxide. Topics include reasons for studying them, potential hazards, methods for studying them, and some facts about the gases emitted by the eruption of Mount St. Helens. A downloadable, printable version is available. Full description.

This fact sheet discusses the eruptive history and hazards associated with Glacier Peak, the most remote of the five active volcanoes in Washington State. Topics include past eruptions, the potential for large, explosive eruptions with pyroclastic flows produced by collapse of lava domes, and prospects and preparations for future eruptions. Full description.

This United States Geological Survey (USGS) resource provides links to news and current events regarding volcanoes and current activities and a summary for the Cascade Range and its volcanoes. Other links connect to information about living with volcanoes, visiting a volcano, educational outreach, and hazards assessment reports and maps. There are also extensive menus for links to the USGS volcano ... Full description.

Shishaldin Volcano in Alaska. Full description.