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Exploratorium
Exploratorium: Earthquake Faultline Earthquake Activities
This outstanding website provides an excellent variety of hands-on earthquake activities to help you understand what causes earthquakes.
US Geological Survey
U.s. Geological Survey: Rock'n on Shakey Ground [Pdf]
The basics of earthquake science including factual information about how and why they happen. Also includes some hands-on activities and experiments for students.
Incorporated Research Institutions for Seismology
Iris: Incorporated Research Institutions for Seismology
This university consortium provides on-going, current information on seismic activity happening all over the world. Of special interest is the Seismic Monitor. Open this page to a full screen to monitor global earthquake activity in real...