There was an earthquake at 4:37am CDT this morning in southern Illinois, magnitude 5.2; it's epicenter was near West Salem, Illinois (about 50 miles east of Evansville, Indiana).

http://en.wikipedia.org/wiki/April_18%2C_2008_Midwest_Earthquake

It managed to get my attention in Chicago's south suburbs, about 250 miles north of the epicenter, and most reports seem to be from cities NW/north/NE of the quake. Anybody in Memphis feel it?