Mrs. Labson Library

"Tsunami: the Great Waves" brochure presented by the National Oceanographic and Atmospheric Administration.  See also NOAA's tsunami website.

"Tsunami and Seismic Sea Waves" description and links at the US Geological Survey.

"Lessons from Japan" article about the March 2011 earthquake and tsunami in Popular Mechanics.

"Disaster in Japan" article from Science World.

"Japan earthquake: Tsunami hits north-east" at the BBC, including video footage captured during the earthquake and tsunami.

"Japan Tsunami" pictures and links to other tsunami events at National Geographic.

"Tsunami" article at Wikipedia.  See also the "external links" at the bottom of the article, which include links to videos.