Shaking in western suburbs was a quarry blast

November 04, 2013|RedEye

What many people thought to be an earthquake in the Chicago area Monday afternoon was really a quarry blast at the McCook Quarry, according to the U.S. Geological Survey.

The blast was equal to that of a 3.2-magnitude earthquake, the USGS reported. Initially, the USGS classified the shaking as a quake centered in Indian Head Park but quickly revised its report.

The shaking, according to the USGS, happened at 12:35 p.m.

Around that time, reports started circulating on social media about shaking in the western suburbs. People who said they lived in Darien, Clarendon Hills, Brookfield and other near-west suburbs said they felt shaking and/or heard a rumble.

Tom Skilling posted on Facebook and Twitter about the reports, saying it could be blasts at the McCook Quarry, which is near the village of Brookfield.

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