December 2015 – MEDFORD, Oklahoma — At least seven earthquakes rattled north-central Oklahoma on Monday, including one felt 300 miles away in Iowa, prompting concern from local residents and policymakers that the state isn’t doing enough to curb the quakes that scientists have linked to oil and gas activity. The strongest a 4.7 magnitude quake felt throughout much of the state and into Kansas. There were no immediate reports of damage from Monday’s quakes. The U.S. Geological Survey says the 4.7 magnitude earthquake hit at 3:49 a.m. 16 miles west-southwest of Medford, or about 80 miles south of Wichita, Kansas.
A 3.0 magnitude quake struck just outside the Oklahoma City metropolitan area at 5:50 a.m. A 3.1 quake was registered at 7 a.m. near Perry. A 3.2 magnitude quake was recorded at noon near Cherokee. Another 4.7 magnitude temblor hit northern Oklahoma on Nov. 19. That earthquake prompted state regulators to shut down some oil and gas wastewater disposal wells in the area and reduce the volume at others. –Herald News