Aftershocks rattle Oklahoma after big quake


Two of the aftershocks were of magnitude 4.0 and was centered about 45 miles east of Oklahoma City.

The strongest of the weekend earthquakes had a record-setting magnitude of 5.6 and hit the area Saturday night.

The first earthquake Saturday morning registered at 4.7.

No injuries were reported, and aside from a buckled highway and the collapse of a tower on the St. Gregory's University administration building, neither was any major damage.

The quakes are being felt as far away as Arkansas, Texas and Missouri.

Oklahoma typically had about 50 earthquakes a year until 2009. Then the number spiked, and 1,047 quakes shook the state last year, prompting researchers to install seismographs in the area. Still, most of the earthquakes have been small.

The Associated Press contributed to this report.

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