This is the homepage of the United States Geological Survey's (USGS) Long Valley Volcano Observatory (LVO). It features a variety of information on the Mono-Inyo Craters volcanic chain in Long Valley Caldera, California. Materials include a current conditions page with status reports, updates and information releases. There is also monitoring data on seismic activity, ground deformation, gases and ... Full description.

This website of the United States Geological Survey (USGS) and the National Park Service (NPS) is a source of geologic information about Sunset Crater Volcano National Monument. It offers a virtual field trip through the area to learn more about cinder cone volcanics and the history of this region. General volcanic information includes an image gallery of the monument, a brief history of the eruptions ... Full description.

This activity is an active simulation of an explosive volcanic eruption. The model volcano is a plastic 35 mm film cannister that erupts (the lid blows off) when gas pressure generated by dissolving alka seltzer is sufficiently high. It is realistic in that the timing of the eruption is difficult to predict precisely and in that the eruption occurs when the pressure of the gas exceeds the confining ... Full description.

This United States Geological Survey (USGS) on-line publication highlights the volcanic hazards facing the people living on the Island of Hawaii. These hazards include lava flows, explosive eruptions, volcanic smog, earthquakes and tsunamis. This report discusses these hazards, the volcanoes of Mauna Loa and Kilauea, and the work of the Hawaiian Volcano Observatory to monitor and issue warnings to ... Full description.

This lesson introduces students to a variety of natural hazards, emphasizing that when people understand these threats they are better able to avoid or reduce their potential impacts. First, the class discusses what they know about natural hazards and natural disasters. Then, working in pairs, they research particular hazards; the threats they pose and where and when those threats are most pronounced. ... Full description.

This portal provides access to maps, data, and other information on the distribution and frequency of natural hazards in the United States. The material is arranged into seven categories: earthquakes, floods, hurricanes, landslides, tsunamis, volcanoes, and wildfires. There are also links to disaster emergency and relief organizations and to real-time resources such as RSS feeds, advisories, and the ... Full description.

The purpose of NASA's Earth Observatory is to provide a freely-accessible publication on the Internet where the public can obtain new satellite imagery and scientific information about our home planet. The specific focus of this Earth Observatory website is natural hazards. Earth scientists around the world use NASA satellite imagery to better understand the causes and effects of natural hazards. ... Full description.

This Why Files article explores volcanoes and volcanic eruptions. Topics covered include: Alaska's Pavlof and its threat to jet engines; Mexico City's restless neighbor, Popocatepetl (El Popo); underground volcanic processes; modern forecasting of eruptions; various volcanic phenomena and features; large flood basalt areas around the world; California's volcanically active area, Long Valley Caldera ... Full description.

This site is the homepage of the United States Geological Survey's (USGS) Landslide Hazards Program (LHP). Materials available include an overview of the geologic hazard presented by landslides, a discussion of the objectives and operations of LHP, and links to program staff. The site also provides a link to the National Landslide Information Center (NLIC), which is responsible for distributing information ... Full description.

This interactive resource adapted from the National Park Service explains the difference between explosive or effusive (lava pours from a vent onto the ground) volcanic eruptions, and describes the hazards associated with each type of eruption. Full description.