Tri-State residents felt what the USGS is reporting to be a 5.6 earthquake centered about 44 miles Northeast of Oklahoma City, Oklahoma and about 650 miles away from Tri-State area. The time of the earthquake (at the epicenter) was 10:53PM.
Reports of "light shaking" have been reported from around the Tri-State area. We have "felt it" reports from Quincy to Hannibal, Carthage to Griggsville, Augusta to Springfield, Illinois, up to Fort Madison and Keokuk, Iowa. Reports show that the record-setting earthquake was felt from Texas to St. Louis.The 5.6 earthquake was reportedly strongest earthquake in Oklahoma history. This quake is being classified as an "earthquake" and not an "after shock" by the USGS at this time. Read more: http://www.kmbc.com/news/29694688/detail.html#ixzz1ctox3YY4
EARTHQUAKES IN THE STABLE CONTINENTAL REGION Most of North America east of the Rocky Mountains has infrequent earthquakes. Here and there earthquakes are more numerous, for example in the New Madrid seismic zone centered on southeastern Missouri, in the Charlevoix-Kamouraska seismic zone of eastern Quebec, in New England, in the New York - Philadelphia - Wilmington urban corridor, and elsewhere. However, most of the enormous region from the Rockies to the Atlantic can go years without an earthquake large enough to be felt, and several U.S. states have never reported a damaging earthquake. The earthquakes that do occur strike anywhere at irregular intervals.
Earthquakes east of the Rocky Mountains, although less frequent than in the West, are typically felt over a much broader region. East of the Rockies, an earthquake can be felt over an area as much as ten times larger than a similar magnitude earthquake on the west coast. A magnitude 4.0 eastern U.S. earthquake typically can be felt at many places as far as 100 km (60 mi) from where it occurred, and it infrequently causes damage near its source. A magnitude 5.5 eastern U.S. earthquake usually can be felt as far as 500 km (300 mi) from where it occurred, and sometimes causes damage as far away as 40 km (25 mi).
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