Someday, when that is depends on which government agency you believe, the New Madrid fault zone is going to blow. Now there has been a new fault discovered around Marianna making the danger even more real.
There are several states involved with trying to promote earthquake awareness because of the looming danger. Arkansas is having their earthquake awareness week the first week of February.
Here is a link to some geocaches related to Earthquake Awareness:
http://www.wjtv.com/gulfcoastwest/jtv/n ... -0009.html