An earthquake of four-point-five magnitude shook parts of northern Illinois on June 27, 2004. Its epicenter was near Troy Grove, about 70 miles west of Chicago, and it caused no major damage. Just how common are earthquakes in Illinois?
An earthquake of four-point-five magnitude shook parts of northern Illinois on June 27, 2004. Its epicenter was near Troy Grove, about 70 miles west of Chicago, and it caused no major damage. Just how common are earthquakes in Illinois?