At 1:11 AM CT on Monday morning, an earthquake with a magnitude of 4.1 struck in northern Illinois, epicentered near the town of Ottawa. Quakes in this area are quite rare, but have been previously recorded in 1881, 1912, and 1972. The three-second temblor was felt over a wide swath of the Midwest, including areas in Iowa, Wisconsin, Indiana, Michigan, and Missouri.
Coast listener Shawn N. of Racine, WI wrote in to describe his experience: "The house gently shook for at least 5 seconds. I thought I was hallucinating or something until I came across a link online that verified it as an earthquake...Never thought I'd see the day when an earthquake would hit in the Midwest! After months of monsoon-like rain, and tornadoes, and now an earthquake?!...something strange is going on here..."