M 3.8 - 3 km W of Flat Rock, Illinois
- 1991-11-11 09:20:44 (UTC)
- 38.905°N 87.710°W
- 0.0 km depth
Felt (III) at Allendale, Bellmont, Birds, Claremont, Mt. Carmel, Newton, Noble, Parkersburg, Robinson, Sainte Marie, Sumner and West Liberty, Illinois. Also felt in the Lawrenceville and Olney, Illinois areas.