This is a link to the some tsunami animations. They don’t have any audio but the video portions are really well done. I would use them to help the students have a visual image of what is going on. It’s often difficult to really picture what the book is saying. As a side note I think its cool that the village which gets flooded by the tsunami is covered in snow.
Also the entire Alaska Earthquake Information Center (of which the above link is a part) has lots of cool information.