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Volcanoes
Vents in the surface of the Earth through which magma and associated gases erupt; also, the forms or structures, usually conical, that are produced by the erupted material. [Glossary of Geology, 4th ed.]
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Volcano Hazards Program [New Window]
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.
Volcanoes [New Window]
This booklet presents a generalized summary of the nature, workings, publications, and hazards of the common types of volcanoes around the world, along with a brief introduction to the techniques of volcano monitoring and research.
Volcanoes of Hawaii feature stories archive [New Window]
Archive of feature stories on volcanic features on the Big Island, guided tours of Hawaii Volcanoes National Park, eruptions and eventful earthquakes, and other topics about the work of scientists at the Hawaiian Volcano Observatory.
Volcanoes of Hawaii photo gallery [New Window]
Images of Hawaiian volcanoes and the islands they've built in the past few million years, and images of recent eruptions.
Volcanoes of the United States [New Window]
Booklet detailing plate tectonics, eruptions, hazards, and monitoring of U.S. volcanoes with black and white photos.
Cascades Volcano Observatory - Learn about volcanoes [New Window]
Educational volcano site providing answers to frequently asked volcano questions with links to other general information on volcanoes and to information on specific volcanoes including the Cascade Range volcanoes.
Most recent updates for U.S. volcanoes [New Window]
Short descriptions of recent volcanic activity in the US.
This dynamic planet: World map of volcanoes, earthquakes, impact craters, and plate tectonics [New Window]
Online world map with booklet (PDF format) giving an account of plate tectonics, volcanology, earthquake activity, and impact craters.
1915: Lassen's most recent eruption [New Window]
Summary of the most recent eruption of Lassen Peak, Cascades (1914-1917)
Alaska Volcano Observatory [New Window]
Homepage for Alaska Volcano Observatory (AVO) with offices in Anchorage and Fairbanks monitors and studies Alaska's hazardous volcanoes. Links to featured news, updates, publications and products, and a volcano atlas for Alaska.
Carbon dioxide and helium discharge from Mammoth Mountain, Long Valley caldera, California [New Window]
An explanation of toxic carbon dioxide emissions at Mammoth Mountain in Long Valley caldera, and a description of magmatic helium discharge at the Mammoth Mountain fumarole with photos, maps, and links to other studies.
Cascades Volcano Observatory [New Window]
Portal to information provided by the Cascades Volcano Observatory in Vancouver, WA with links to reports and activity in the Cascade Range and other volcanoes and multiple links to general information on volcanology, reports, research, and maps.
Earth tides and volcano monitoring [New Window]
Article in the May 28, 1998 issue of Volcano Watch describing of correlation of earth tides to volcanic eruptions and value in monitoring underground magma movement with deformation measurement instruments including tiltmeters and strainmeters.
Eruptions from the Inyo chain about 600 years ago: sequence of events and effects in the Long Valley Area [New Window]
Describes the volcanic activity that occurred along the southern part of the Mono-Inyo Craters volcanic chain in California about 600 years ago.
Eruptions of Mount St. Helens: past, present, future [New Window]
Online booklet on the 1980 eruption of Mount St. Helens, past history, and future hazards.
Geologic history of Long Valley Caldera and the Mono-Inyo Craters volcanic chain, California [New Window]
Summarizes the geologic and volcanic activity of the Long Valley Caldera and Mono-Inyo Craters volcanic chain in east central California.
Hawaiian Volcano Observatory [New Window]
Hawaiian Volcano Observatory's latest news with links to information on Kilauea, Mauna Loa, and other volcanoes, earthquakes, volcanic hazards, photo archive, and general information about the center.
Hawaiian Volcano Observatory spotlight images archive [New Window]
Images of Hawaiian volcanoes and the islands they've built in the past few million years, images of recent eruptions, and Hawaiian landscapes.
Kilauea - eruption update and image archive [New Window]
Current Kilauea eruption activity, updated daily with recent photos, maps, and deformation information and links to video for broadband users, photo glossary, and image archive.
Kilauea - perhaps the world's most active volcano [New Window]
Current activity, hazards, and history of eruptions of Kilauea Volcano.
Mauna Loa current activity [New Window]
Current activity of Mauna Loa Volcano with news, GPS data, electronic tiltmeter data, and current seismicity plus links to long term monitoring.
Mauna Loa, Earth's largest volcano [New Window]
Current activity, hazards, and history of eruptions of Mauna Loa.
Monitoring data of the Long Valley caldera and Mono-Inyo Craters volcanic chain, California [New Window]
Describes the monitoring effort and provides real-time data of the current restless activity of the caldera, including earthquakes, ground deformation, and release of volcanic gas and plus link to volcano monitoring techniques.
Photo gallery of the Long Valley area, California [New Window]
Selection of photographic images of the Long Valley area that illustrate the consequences of the past geologic history of the Sierra Nevada, Long Valley Caldera, the Mono-Inyo Craters volcanic chain, glaciation, and faulting.
Potential hazards from future volcanic eruptions in the Long Valley -- Mono Lake Area, California [New Window]
An introduction to the volcano hazards in the Long Valley area based on the past geologic history of the Long Valley Caldera and the Mono-Inyo Craters volcanic chain.
Selected volcano information [New Window]
Selected books, maps, videos, and other materials produced by the USGS Volcano Hazards Program. Many products highlighted here are intended for general audiences.
Types and effects of volcano hazards [New Window]
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 [New Window]
Describes and illustrates how scientists use electronic tiltmeters measuring deformation on volcanoes.
Volcano Hazards Program, Long Valley Observatory [New Window]
Overview of the Long Valley Caldera 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 [New Window]
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 [New Window]
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 [New Window]
Describes volcano monitoring at Yellowstone National Park including an update of recent volcanic activity, real-time data, and link to volcano monitoring techniques information.
Volcano video and television surveillance monitoring systems [New Window]
Visual monitoring of volcanoes by closed-circuit television and video monitoring for a permanent video record of events using slow-scan television which permits continuous surveillance at a distance for remote volcanoes or in times of danger.
Volcano watch [New Window]
Volcano Watch is a weekly newsletter issued by the U.S. Geological Survey's Hawaiian Volcano Observatory on volcanic features on the Big Island, volcanic hazards, and informational topics of Long Valley, Montserrat, or Alaska.
Yellowstone Volcano Observatory (YVO) [New Window]
Homepage of the Yellowstone Volcano Observatory with links to information about the observatory at Yellowstone National Park, volcanic history, photo gallery, monitoring data, publications and products, and Frequently Asked Questions (FAQs).


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