Recently, NSTA press had a nice article with some links to several web pages to learn about Earthquakes.
This NASA Jet Propulasion Lab Site is middle school level, but has some nice basics of Earthquake mechanics. http://scign.jpl.nasa.gov/learn/plate4.htm
You can look at actual data on the USGS (US Geological Survey) website at http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc0001xgp.php
To learn more about Earthquakes, the IRIS Incorporated Research Institute for Seismology Website http://www.iris.edu/hq/retm
There is a nice animation of the Tsunami at the NOAA site http://nctr.pmel.noaa.gov/honshu20110311/
Many thanks to NSTA for organizing these sites!
http://www.nsta.org/publications/news/story.aspx?id=58295
