The Missouri area has been hit by few but large earthquakes over the centuries. Mostly in the South East part of the state.
USGS History of earthquakes in Missouri
USGS History of earthquakes in Illinois
Make us Californians proud. Make your home earthquake ready.
Just read a little about your earthquake. 5.2 That's big for you guys. That would be medium for us in California, but would probably cause very little damage for us as the buildings are built to a much higher standard than a 5.2.