A magnitude 3.8 earthquake shook the Chicago suburbs and northern Illinois at 3:59 a.m. today, according to the U.S. Geological Survey. The quake was centered near Pingree Grove, between Hampshire and Elgin.
Though it roused many from a sound sleep, the earthquake did not cause any major damage in DuPage County.
"We have no reports of any damage in the county, fortunately," said Bill Babyar, deputy diretor of the county's Office of Homeland Security and Emergency Management. "We've just been dealing with the storm all night."
Immediately afterward, hundreds of users on the social-networking site Twitter were reporting the shaking from throughout the suburbs, from Kane to DuPage counties all the way east into Chicago.
The quake was originally classified as magnitude 4.3, centered near Sycamore. But the USGS revised its data upon further study.