3.9 magnitude earthquake felt around St. Louis region.
The United States Geological Service has revised the magnitude of the earthquake located near Sullivan, Missouri to a 3.9. from 4.2.
It hit at 3:10 a.m. and lasted several seconds.
The earthquake was 3.2 miles deep and hit 15 miles east, southeast of Sullivan. Sullivan is located about 50 miles southwest of St. Louis.
People have reported feeling it from as far away as Columbia, Missouri and Carbondale, Illinois.
The Kirkwood Police Department says it took at least a half dozen calls from people who say the ground shook.