Features formed from those igneous rocks that have reached or nearly reached the Earth's surface before solidifying. [Adapted from Glossary of Geology, 4th ed.]
Alexandria Digital Library Feature Type Thesaurus
The ongoing Pu'u 'O'o eruption of Kilauea Volcano, Hawai'i -- 30 years of eruptive activity [ More info] Fact sheet chronicles and illustrates Kilauea Volcano's longest rift-zone eruption in more than 500 years.
The story of the Hawaiian Volcano Observatory -- A remarkable first 100 years of tracking eruptions and earthquakes [ More info] History of the Hawaiian Volcano Observatory (HVO), established in 1912, including an overview of Hawaiian volcanic processes and USGS monitoring techniques.
This dynamic planet: World map of volcanoes, earthquakes, impact craters, and plate tectonics [ More info] Online world map with booklet (PDF format) giving an account of plate tectonics, volcanology, earthquake activity, and impact craters.
Types and effects of volcano hazards [ More info] Describes the 6 main types of hazardous activities and processes associated with volcanoes, including tephra, lava flows, pyroclastic flows, lahars (volcanic mudflows), landslides, and volcanic gas.
Using tiltmeters to measure volcano deformation [ More info] Describes and illustrates how scientists use electronic tiltmeters measuring deformation on volcanoes.
Volcano Hazards Program [ More info] Homepage for USGS Volcano Hazards Program with feature stories, and links to worldwide volcano updates, volcanic hazards, reducing volcanic risk, USGS international programs, and resources such as educator's page, videos, and online reports.
Volcano Hazards Program, California Volcano Observatory [ More info] Overview of volcano hazards in California with links to monitoring data including earthquakes and deformations, long-term outlook, volcano hazards in the area, USGS response plan, image gallery, monitoring and topical studies, publications and references.
Volcano and hydrologic hazards, features, and terminology [ More info] Links to explanations of volcanic hazards and features and to a glossary of volcano terminology.
Volcano hazard zones in the Long Valley - Mono Lake Area, California [ More info] Describes the volcano-hazard zones for the Long Valley and Mono-Inyo Craters volcanic chain identified by scientists of the U.S. Geological Survey.
Volcano monitoring at Yellowstone National Park [ More info] Describes volcano monitoring at Yellowstone National Park including an update of recent volcanic activity, real-time data, and link to volcano monitoring techniques information.
Alphabetical Index of Topics
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