This is an old post I know, but why not contribute?
I recently found on the net a recording of the underwater earthquake that caused the tsunami. It was recorded by underwater microphones used to record just this sort of thing. It was by far the most eerie thing I have ever heard. Just imagining being fathoms deep in the darkness hearing this quiet sound come rolling in and turning into a deafening roar (as it did on my computer) I felt scared of that noise. I also saw video of the wave coming, and it looked so small when I watched it. It rolled in, but not like the movies have it towering over people. Maybe just bad point of view on the film. But that sound freaked me out. Here is a link so you can hear it.
http://msnbc.msn.com/id/8670264