Overview
- The USGS recorded a magnitude 3.5 quake at about 1:30 a.m. with an epicenter roughly 2.5 miles northwest of Ohlman in southern Christian County.
- The earthquake occurred at an estimated depth of 8.8 kilometers.
- Residents reported light shaking across central Illinois, with some reports coming from the St. Louis area.
- No damage has been reported following the early-morning tremor.
- The area lies within the Illinois Basin–Ozark Dome near the more active New Madrid seismic zone, where smaller quakes occur about once or twice a year and can be felt across broad areas in the eastern U.S., according to the USGS.