Carbondale is at the north end of the New Madrid Seismic Zone, and as such is as likely to experience severe earthquake damage as better known regions such the San Andreas, in California.
Know what to do when the earth starts to move under your feet.
The U.S. Geological Survey shaking-hazard maps for the United States are based on current information about the rate at which earthquakes occur in different areas and on how far strong shaking extends from earthquake sources. Colors on this particular map show the levels of horizontal shaking that have a 1-in-50 chance of being exceeded in a 50-year period. Shaking is expressed as a percentage of g (g is the acceleration of a falling object due to gravity). Source: http://pubs.usgs.gov/fs/fs-131-02/fs-131-02.pdf