USGS says Chicago area did experience an earthquake on Nov. 4
Posted on November 15, 2013 by The Extinction Protocol
November 15, 2013 – CHICAGO (AP) — Scientists of the U.S. Geological Survey say it’s likely it was an earthquake that shook Chicago’s 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. –CBS
Thanks to: http://theextinctionprotocol.wordpress.com
Posted on November 15, 2013 by The Extinction Protocol
November 15, 2013 – CHICAGO (AP) — Scientists of the U.S. Geological Survey say it’s likely it was an earthquake that shook Chicago’s 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. –CBS
Thanks to: http://theextinctionprotocol.wordpress.com