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© Dimas Ardian, Getty Images
An earthquake that initially has been reported as matching the strongest quake in Oklahoma's history was felt across Oklahoma early Saturday, rattling windows and waking residents.

The 5.6 quake was centered northwest of Pawnee and occurred at 7:02 a.m., according to the U.S. Geological survey.

Initial indications on social media were that the quake could be felt across the state, from central Oklahoma to northeast Oklahoma. Reports of feeling the quake also came from Texas and Kansas.

The temblor's initial measurement indicates it matches the strongest quake in state history, a 5.6 magnitude earthquake on Nov. Nov. 6, 2011, in the Lincoln County town of Prague.

Hundreds of earthquakes have shaken Oklahoma annually in recent years, but rarely have they been felt in northeast Oklahoma. Often the quakes are below 4.0 magnitude.