This resource provides a collection of links to photos and information about volcanoes. Links are divided into the following categories: volcano classifications, types of eruptions, volcanic deposits, scales of impact, and volcanic hazards. Full description.

This portal provides links to an extensive list of volcano-related websites for the United States and around the world. Users can access articles, maps, glossaries, webcams, a dictionary of volcanoes, and many other resources. Full description.

This site describes active volcanoes from around the world by using the volcano links from the Michigan Technological University and the homepages of observatories at active volcanoes. Each volcano section contains photo images, maps, and reference text. Some sections contain bibliographies, volcano reports, and video clips of lahars. The volcanoes are organized by the following geographic regions: ... Full description.

This slide show describes scientists' travels to the ends of the earth to study climate variability. Included in this set are color photos of the Greenland Ice Sheet and the Antarctic Ice Sheet, in addition to a comprehensive text for each slide. Examine ice cores, visit science camps, and understand the importance of these two enormous ice sheets. Maps and graphical representations of ice core data ... Full description.

From our home planet to distant neutron stars, this narrated videotape presents recent scientific visualizations of observation and simulation data. We begin with a dramatic journey over SC99 host city Portland and its surroundings. Later explorations accompany the X-33 aerospace plane on its first test flight, witness Mississippi River flooding, and follow global life over 22 months. New views of ... Full description.

The Electronic Volcano offers links to many types of information on active volcanoes, such as maps, photographs, full texts of dissertations and a few elusive documents. The Electronic Volcano will guide you to resources in libraries or resources on other information servers including catalogs of active volcanoes, datasets for literature citations, electronic and hard-copy journals, visual information, ... Full description.

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.

The distribution of earthquakes and volcanoes around the world confirmed the theory of plate tectonics first proposed by Wegener. These phenomena also help categorize plate boundaries into three different types: convergent, divergent, and transform. Full description.

This resource provides information about variances in size and explosiveness of volcanoes that have erupted during the past 10,000 years. Included is a table showing that small eruptions are more frequent than larger ones. A feature of this site is the introduction of a scheme for estimating the magnitude of historic eruptions, called the Volcanic Explosivity Index (VEI). Historical eruptions can ... Full description.

This page describes the different types of calderas: Crater-Lake type calderas, which are associated with the collapse of stratovolcanoes; basaltic calderas, which result from the summit collapse of shield volcanoes; and resurgent calderas, which lack an association with a single centralized vent. Each type is described in detail with photographs, maps, diagrams, and examples. Multiple links lead ... Full description.