| 2004 Chicago Earthquake |
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The earthquake was the first in La Salle County, Illinois since September 1972. It occurred 3.1 miles beneath the surface in a structure associated with the Sandwich Fault Zone. It was ''not'' connected with the New Madrid Fault farther south, which has been linked to the Midwest's most serious earthquakes. No injuries occurred; the mildness of the earthquake did not affect many as well as the time it occurred. Three nearby nuclear power plants— La Salle , Quad Cities , and Dresden —issued low-level alerts, but no damage was found. EXTERNAL LINKS
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