2.4 magnitude earthquake strikes O'Fallon, Illinois, part of the New Madrid Seismic Zone.

2.4 magnitude earthquake hits O'Fallon, Illinois, first known in the area; New Madrid Seismic Zone experiences a minor swarm of quakes, including two others in southern Missouri. USGS seismologist confirms the event, but it is not a cause for concern as small earthquakes in the area are common. This is the seventh instance of an earthquake with a magnitude of 2.0 or more within 30 miles of St. Louis in the past ten years.