U.S. Geological Survey
Google - Research database allows searching of the scholarly literature.
Cornell University - This site allows you to explore the concepts of plate tectonics in more detail, including an interactive mapping tool called QUEST.
Smithsonian Institute - The Global Volcanism Program (GVP) has up-to-the-minute information about volcanic eruptions worldwide and a downloadable database of recent eruptions.
U.S. Geological Survey - The USGS hosts a real-time earthquake map and a downloadable database of all earthquakes since 1990.
Illustrations formatted for printing on transparencies or displaying with a projector
An alphabetical glossary of relevant scientific terms.
San Francisco Museum - This site offers eyewitness accounts of the 1906 San Francisco quake.
PBS - An interactive plate tectonics animation that illustrates the processes occurring at plate boundaries.
Cornell University - You can move and rotate the continents to reconstruct Pangaea.