C. Hayes WGNTV NEWS February 10, 2010 A magnitude 4.3 earthquake hit northern Illinois early Wednesday morning. The quake struck at 3:59 a.m. in Sycamore in DeKalb County. The quake could be felt as far away as Chicago... 50 miles from the epicenter. We'll have more information as it becomes available. For the latest information, go to the U.S. Geological Survey website.