Oklahoma earthquake rating upgraded to magnitude 5.1

10/13/10 An earthquake that struck central Oklahoma today was the second-strongest in the state's history, the Oklahoma Geological Survey reported. No significant damage or serious injuries have been reported with the quake, which was felt in three states.

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Earthquake rating upgraded to magnitude 5.1

10/13/10 An earthquake that struck central Oklahoma today was the second-strongest in the state's history, the Oklahoma Geological Survey reported. No significant damage or serious injuries have been reported with the quake, which was felt in three states.

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Oklahoma Earthquake Swarm: Lots Of Data, But Few Answers

06/07/11 Researchers at the Oklahoma Geological Survey have been cataloguing earthquakes in the state for more than 100 years, but never have they had so many to catalogue or been so baffled as to their underlying cause.

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