New Madrid Earthquake
The New Madrid Earthquake was the most powerful earthquake recorded in US history on February 7, 1812. It was preceeded by 2 similar quakes, beginning on December 16, 1811. The epicenter for them was New Madrid, Missouri, about 150 miles south of St. Louis, and they were magnitude 8 quakes. In St. Louis, chimneys were toppled and log cabins were thrown down. Huge waves on the Mississippi River overwhelmed many boats and washed others high on the shore. Casualties were low in the area, since it was still sparsely inhabited at the time. There were just more than 1,200 in St. Louis to experience the quakes.
- New Madrid earthquake on Wikipedia - for more info on the earthquake and it's affects outside the St. Louis area
- U.S. Geological Survey page about the New Madrid Seismic Zone
- Earthquakes of 1811 and 1812 - a SLU website