I was just watching something on National Geographic channel or Discovery? (can't remember) but it said that there is a MAJOR fault line running out there around S. Illinois that causedweeks of earthquakes into the 8.0's in the 1800's maybe? ........but it was before there was anything to really damage.
They said that a really big one is only a matter of time and it is supposed to flatten St. Louis I think .[:-]

I have to see if I can find a link to the whole story it was really interesting. I guess the last big one out there was powerful enough to cause the Mississippi river to flow BACKWARDS. []

Yeah good luck with that.