USGS geophysicist Jana Pursley says the earthquakes began around 1:45 a.m. Tuesday and all were centered northeast of Oklahoma City. She said three earthquakes have been confirmed and that she was working on a confirming a possible fourth. She says the strongest was a magnitude 4.3 quake centered near the town of Luther.
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Pursley says all the quakes were shallow, which is common for the area. She also says it's common for several earthquakes or aftershocks to strike during a short period of time.
An official answering the dispatch line for the Oklahoma County Sheriff's office says they have received no reports of damage or injuries.