Tremors reported in suburbs
LaGRANGE (AP) – Some residents in Chicago’s western suburbs say they felt the ground shake and authorities say it could have been a small earthquake.
U.S. Geological Survey geophysicist Julie Dutton says the tremors on Tuesday afternoon appear to be an earthquake. The agency’s website shows an earthquake centered in LaGrange measuring 2.7 on the Richter scale.
But Dutton also says such shaking can be caused by mining blasts. She says it isn’t unusual for the agency’s monitoring equipment to pick up activity from blasts.
A worker at Hanson Materials Service in nearby McCook says the company was doing mining work on Monday, which included blasts in its quarry.
Residents in Westchester, LaGrange and Western Springs say the tremors lasted 1 to 2 seconds.
No injuries were immediately reported.
