A seismograph at the Saint Louis University Earthquake Center continues to record seismographic activity after recording an earthquake around 1:11 a.m. CDT that measured 4.5 in St. Louis, Monday, June 28, 2004. The U.S. Geological Survey in Colorado, said the quake's epicenter was about eight miles northwest of Ottawa in northern Illinois, close to the small village of Troy Grove, a rural area is about 70 miles west of Chicago. No damage has been reported. (AP Photo/Charles Rex Arbogast)
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