By Mike Lynch
Feb. 7, 2012, marks the 200th anniversary of the last and possibly strongest event of a series of very strong earthquakes that shook eastern North America in the winter of 1811-12. The events occurred on what became known as the New Madrid Seismic Zone (NMSZ), located along the Mississippi River in northeastern Arkansas, southeastern Missouri, northwestern Tennessee, and western Kentucky.
Because seismic instruments were not available at that time, today's seismologists can only estimate what the likely magnitudes might have been, based mostly on eyewitness accounts and newspaper reports from that time. The magnitudes of the three largest shocks ranged between 6.8 and 7.7 on the Richter scale, which also didn’t exist at the time of these events.
Two departments at the University of Kentucky, the