The U.S. Geological Survey is reporting a 3.8 magnitude earthquake that shook northern Oklahoma near the Kansas border early Saturday morning.
The USGS says the quake struck this morning at 3:46 AM near Medford, Oklahoma. At a depth of approximately 1.8 miles.
No damage or injuries have been reported. Geologists say earthquakes of magnitude 2.5 to 3.0 are generally the smallest that are felt by humans and damage is not likely from earthquakes below magnitude 4.0.
The Oklahoma Geological Survey has said it is likely that many recent earthquakes in the state are being triggered by the injection of wastewater from oil and natural gas drilling operations.