Tsunamis, unlike wind-generated water waves, can have a wavelength in excess of 100 km and a period in excess of one hour.  Tsunamis can travel great, transoceanic distances with limited energy losses, causing catastrophic results when they reach a shoreline.  This web site provides a set of simple tutorials on the physics of tsunamis.  Each tutorial is presented in clear, straightforward language, with multiple animations and simulations to depict how these destructive waves originate and propagate.  

This item is part of a larger set of resources on tsunamis developed and maintained by the Earth and Space Sciences project at the University of Washington.

Please note that this resource requires Quicktime.