Breaking News Bar
updated: 11/15/2013 8:15 AM

Western suburbs hit by quake after quarry blast, USGS says

hello
Success - Article sent! close
 
Associated Press

Scientists of the U.S. Geological Survey say it's likely it was an earthquake that shook the western suburbs after a blast at a quarry.

USGS scientist Jim Dewey says research indicates quarry blasts don't cause larger follow-up tremors. However, a quarry blast in McCook was followed by a related tremor seven seconds later.

Dewey says USGS scientists now believe the blast triggered a release of tectonic strain at a shallow depth, not miles deep in the earth's crust where earthquakes usually originate.

The USGS and Hanson Materials, owner of the quarry, will install a seismograph in the quarry which will make hourly readings of the earth's behavior.

The Nov. 4 tremor shook several communities southwest of Chicago. There were no reports of damage or injuries.

Share this page
Comments ()
Guidelines: Keep it civil and on topic; no profanity, vulgarity, slurs or personal attacks. People who harass others or joke about tragedies will be blocked. If a comment violates these standards or our terms of service, click the X in the upper right corner of the comment box. To find our more, read our FAQ.