Seismic event chart from the newspaper

Comparison Chart of Seismic events

The Alaskan Earthquake of 1964 was the worst one recorded in the US. Here is info here: http://www.aeic.alaska.edu/quakes/Alaska_1964_earthquake.html

The ones here in Missouri between 1811 and 1812 actually made the Mississippi forge a new path and flow northward for a time: http://earthquake.usgs.gov/earthquakes/states/events/1811-1812.php