The U.S. Geological Survey reports a series of earthquakes along the Oklahoma-Kansas border – including magnitude 4.2 and 4.1 temblors near Medford.
Emergency management and law enforcement officials say no injuries or damage are reported.
The 4.2 quake was recorded at 12:29 p.m. Saturday nine miles northwest of Medford, the same area where a 4.1 magnitude quake was recorded at 5:11 a.m. Reports on the USGS website say it was felt in Oberlin, Kansas, some 400 miles away.
The two are among 11 earthquakes in north-central Oklahoma and south-central Kansas. The others ranged from magnitude from 2.5 to 3.5.
The Oklahoma Geological Survey has said many recent earthquakes in the state likely were triggered by the injection of wastewater from oil and natural gas drilling operations.