I second your opinion of spunkets reply......
I found this while trying to inderstand it....might interest you or others, too:
The Physics of Tsunamis
The mechanisms of tsunami generation and propagation
sections:
What does "tsunami" mean?
How do tsunamis differ from other water waves?
How do earthquakes generate tsunamis?
How do landslides, volcanic eruptions, and meteorites generate tsunamis?
What happens to a tsunami as it approaches land?
What happens when a tsunami encounters land?
http://www.geophys.washington.edu/tsunami/general/physics/physics.html
Thnks for the link..took a while to load..the server must be swamped..bookmarked for tonite late.