US Geological Survey
Usgs: Earthquakes
The U.S. Geological Survey sponsors this site about the history of earthquakes in the United States as well as information about how earthquakes are detected and measured.
US Geological Survey
U.s. Geological Survey: Earthquakes for Kids
A collection of articles, games, printouts, facts, science fair ideas, and links through which students learn about the history and science of earthquakes and also explore what it takes to be an "earthquake scientist."