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FAIRVIEW, Okla. (AP) — Four small earthquakes have been recorded in Oklahoma — two in northern Oklahoma and two in the central part of the state.
The U.S. Geological Survey recorded a magnitude 3.8 quake at 12:19 a.m. Wednesday 17 miles northwest of Fairview and a 2.9 magnitude temblor at 4:40 a.m. 16 miles southwest of Medford.
The USGS also reports a 3.1 magnitude quake at 12:51 a.m. four miles northeast of Edmond and a 2.8 magnitude quake in the same area at 6:51 a.m.
There are no reports of damage or injury.
Oklahoma's increase in earthquakes has been linked to the injection of wastewater underground from oil and gas production. State regulators have ordered reducing the volume or shutting down some of the disposal wells in hopes of curtailing the quakes.