The U.S. Geological Survey says the quake was recorded about 2:40 p.m. Tuesday about 8 miles (13 kilometers) south-southeast of Medford, about 93 miles (150 kilometers) north of Oklahoma City. It was recorded at a depth of about 4 miles (7 kilometers).
No damage was immediately reported. Geologists say damage is unlikely in temblors below magnitude 4.0.
Thousands of earthquakes in Oklahoma have been linked to underground injection of wastewater from oil and gas production. The USGS reports the number of magnitude 3.0 or greater earthquakes is on pace to decline for the fourth straight year after state regulators began directing producers to close some wells and reduce volumes in others.
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