New Madrid Seismic Zone Maps
Mississippi River ran backward ??? Click here.
Clicking a map on this website will usually take you to its source.
Map of the New Madrid and Wabash Valley seismic zones. Red circles indicate earthquakes that occurred from 1974 to 2002 with magnitudes larger than 2.5 (University of Memphis).
Green circles denote earthquakes that occurred prior to 1974. Larger earthquakes are represented by larger circles.
From USGS Fact Sheet 131-02, "Earthquake Hazard in the Heart of the Homeland"