From Newsweek:
A magnitude 3.5 earthquake struck southern Illinois in the early hours of Tuesday morning, according to the U.S. Geological Survey (USGS), a tremor felt in neighboring St. Louis, Missouri.
The epicenter was located around 2.5 miles east of Ohlman, Illinois, and the quake had a depth of around 5.5 miles, the USGS said. More than 1,000 people reported feeling the tremor to the USGS.