This fact sheet discusses the dangers associated with debris flows, as seen in the United States. Topics include an introduction to the properties of debris flows, a discussion of where they occur, their association with fires and volcanic activity, and some suggestions for people who live in areas prone to debris flows. Full description.

This map shows debris flow hazard areas in the United States, including locations of known debris flows and predictions of where future flows might occur. It shows the locations of debris flows in two different ways, as points representing the locations of individual flows or small groups of flows, and as areas or polygons containing one or more debris flows. Different symbols are used to indicate ... Full description.

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 is the homepage of the United States Geological Survey's (USGS) Yellowstone Volcano Observatory. It features news articles, monitoring information, status reports and information releases, and information on the volcanic history of the Yellowstone Plateau Volcanic Field. Users can access monthly updates with alert levels and aviation warning codes and real-time data on ground deformation, earthquakes, ... Full description.

This article discusses the idea of 'hot spot' volcanoes, those not associated with plate tectonic boundaries, but rather with relatively stationary sources of heat energy (thermal plumes) in the mantle. Topics include the development of the theory by Canadian geophysicist J. Tuzo Wilson; the mechanics of volcanism over a hot spot as seen in the Hawaiian Islands; ancient Hawaiian observations of the ... Full description.

This guide introduces students to the task of conducting a literature review in the earth sciences. It covers six steps, beginning with a keyword search on the internet, a search of bibliographic databases, and extensive reading of recent literature. Concluding steps consist of an examination of popular literature (newspapers, popular science reviews, and societal review publications), return visits ... Full description.

This portal provides links to information on the occurrence, quality, quantity, and availability of mineral resources. The resources are grouped by geographic region, publication or data type, and by issues and projects. Basic search is by keyword; advanced search options include text search in variable contexts, date, and a number of options for displaying search results. Full description.

This website provides an overview of the San Andreas Fault Observatory at Depth (SAFOD) project, an initiative to drill into the fault in one of its most predictively active segments near Parkfield, California. Information accessible at the site includes a discussion of drilling methods, an introduction to the structure of the fault zone as it appears at Parkfield, and a discussion of earthquake prediction. ... Full description.

This interactive map shows landslide hazard areas of the United States. Users can click on selected areas of the map (marked by circles) to view more detailed enlargements. The map is color-coded; areas of high landslide incidence or susceptibility are colored pink or red. It is accompanied by an open-file report that provides an overview of the study. There are also links to shapefiles of the landslide ... Full description.

This virtual tour features three-dimensional images from the United States Geological Survey's (USGS) collection. It introduces visitors to the geology, landforms, and volcanism of Hawaii Volcanoes National Park. Features of interest include Kilauea Caldera and Halema'uma'u Crater, which have been the sites of very recent volcanic activity. There are also views of active lava flows, steam vents, and ... Full description.