Even if you are mathematically challenged, you still might enjoy David Stephenson's June 2005 article from Physics Today - Tsunamis and Earthquakes: What Physics is Interesting?
He explains the dynamics involved in earthquakes and tsunamis. He also explains why the tsunami is better understood than the earthquake itself.
It's great to read an physics article so clearly written that I can share it with my friends who lack a scientific knowledge. People want to learn more right now about these natural events and what causes them.