A 4.1 early this morning between Langston and Guthrie:

http://www.news9.com/story/24321881/two-more-earthquakes-rattle-central-oklahoma-sunday-morning
List of Recent Earthquakes for Central US (http://folkworm.ceri.memphis.edu/recenteqs/Quakes/quakes0.html)
Recent Oklahoma Earthquakes (http://stillwaterweather.com/okareaearthquakes.php)

http://earthquake.usgs.gov/product/dyfi/usc000ltkv/us/1388338725525/usc000ltkv_ciim.jpg