Cornell University - This site allows you to explore the concepts of plate tectonics in more detail.
Smithsonian Institute - The Global Volcanism Program documents, analyzes, and disseminates information about global volcanic activity.
U.S. Geological Survey - The USGS hosts a real-time earthquake map and a downloadable database of all earthquakes since 1990.
San Francisco Museum - This site offers eyewitness accounts of the Great 1906 San Francisco quake.
News & Events
Earth Observatory / NASA
News from around the world of science.
Google - Research database allows searching of the scholarly literature.
PBS - An interactive plate tectonics animation that illustrates the processes occurring at plate boundaries.
Dr. Ron Blakey, Professor of Geology, Northern Arizona University - Shows the global plate movements from the Late Proterozoic to the present