This page presents information about the four principle types of volcanoes found on Earth. Diagrams showing the internal structure of each type and photographs of well-known examples are provided. Full description.

This site offers links to current volcanic activity reports, volcanic hazards mitigation, information on Central American volcanoes, remote sensing of volcanoes, volcanologic research in online journals, and more. There are also links to a site with information on becoming a volcanologist, and a comics page of volcano humor. Full description.

This website integrates video footage and information with lesson plans and activities to teach students about volcanoes. Students learn about some of the most dangerous volcanoes, plot locations, research hazards, and assess risks presented by volcanoes. There are lesson plans for each activity with objectives, videos, pre-activities, materials, and discussion questions. There are worksheets, lists, ... 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 glossary of terms is specific to the discussion of volcanoes. It contains terms such as aa (a type of lava), and silicic (a term used to describe silica-rich volcanic rock or magma). Many of the terms not only have definitions, but serve as active links to sites with additional information about the term. Full description.

This volcanoes site provides information about volcanoes as well as a classroom activity. There are video clips which show some of the features discussed, such as types of lava and eruptive styles. Topics covered by the text include how rocks melt, where and why volcanoes occur (plate tectonics), hot spots, volcanic hazards, forecasting eruptions and coping with risk. The classroom exercise involves ... Full description.

This fact sheet discusses the eruptive history and hazards associated with Glacier Peak, the most remote of the five active volcanoes in Washington State. Topics include past eruptions, the potential for large, explosive eruptions with pyroclastic flows produced by collapse of lava domes, and prospects and preparations for future eruptions. Full description.

This is the homepage of the United States Geological Survey's (USGS) Cascades Volcano Observatory (CVO). The site features news and events, updates on current activity of Cascade Range volcanoes, and information summaries on each of the volcanoes in the range. There are also hazard assessment reports, maps, and a 'Living with Volcanoes' feature that provides general interest information. A set of ... Full description.

In this module, students can explore two ways that volcanoes affect Earth: by directly threatening people and the environments adjacent to them, and by ejecting aerosols into the atmosphere. The module consists of three investigations in which they will study the local effects of volcanism using images of Mount St. Helens, examine how the effects of volcanic activity can be remotely sensed and monitored ... Full description.

At this site students use the Web to explore places they would not otherwise be able to visit. Here they get to visit a volcano erupting approximately 2,300 meters (1.5 miles) below the surface of the sea. During their research, they investigate the dynamic forces at work in the deep seas, including the submarine volcanoes and earthquakes that are the direct result of plate tectonics. To conduct their ... Full description.