Cascades Volcano Observatory Photo archives, Mt. St. Helens, Frequently Asked Questions about volcanoes, visit a volcano. Geysers This site, maintained by Western Kentucky University, provides an easy-to-read, yet detailed description of geysers, what they are, why they are so rare, and how they work. Links connect you to a geyser glossary and a web cam on which you can watch Old Faithful live. Michigan Technological University Volcanoes Page With information on active volcanoes, remote sensing of volcanoes, volcanic hazard mitigation, and much more.

Hawaii Center for Volcanology: Learn about Hawaiian volcanoes.

Kilauea Volcano
Visit this web site developed to take the public and school children to sea on a research cruise to the Puna Ridge, the underwater extension of the East Rift Zone of Kilauea Volcano, Hawaii.

Mount St. Helens
Find out what happened before, during, and after the eruption of Mt. St. Helens on this Volcano World web site.

Photo glossary of volcano terms
The glossary has about 60 terms that are primarily types of volcanoes or vents, eruption types, and eruptive products. Clicking on a term displays a captioned photograph illustrating the concept and a glossary definition.

Recycling at Yellowstone National Park
This Why Files short article discusses some new research on Yellowstone Caldera, a giant volcanic hotspot in Wyoming. Rock has been remelted inside the caldera.

Surtsey
See photos of the volcanic explosion that formed the island of Surtsey and read about the development of life there.

USGS Volcano Hazards Program Learn about hazards posed by volcanoes and how volcanologists monitor active volcanoes. Check out volcanoes of the US (active and historic). View a photoglossary. Read about warning schemes and FAQs. Link to The Educator's Page for free online volcano books, traditional books (most free), and free videotapes through their interlibrary loan. Build a volcano kit and dynamic planet poster. Vesuvius A web page with pictures of Vesuvius including old photographs and drawings of eruptions.

Volcano Lovers
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 and Mammoth Mountain; Indonesia's Krakatau eruption in 1883, which was the world's largest historical eruption; Krakatau's ecological contribution to the study of colonization of sterile lands; and central Mexico's Paricutin which was witnessed emerging from a farmer's field in 1943.

Volcano World
Provides information, photos, and video clips of volcanoes around the world, plus a contest, quiz, and a chance to send your question to a volcanologist.