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EDMOND, Oklahoma - Central Oklahoma residents are demanding to know whether earthquake swarms that have shaken their homes and their nerves in recent months are caused by oil and gas drilling operations in the area.

About 500 residents attended a meeting with regulators and research geologists Thursday night in Edmond. Many urged the Oklahoma Corporation Commission, which regulates the oil and gas industry, to ban or severely restrict wells that are used to dispose of wastewater from drilling.

Edmond resident Mary Fleming says earthquakes shake her house several times a week, causing cracks inside the home.

Earthquakes used to be almost unheard of in Oklahoma and neighboring states, but Oklahoma has recorded 230 so far this year, including a magnitude 3.6 earthquake southwest of Guthrie recorded by the U.S. Geological Survey early Thursday.

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