This story has been updated.
PAWNEE, Okla. (KTUL) -- A 5.6-magnitude earthquake rattled Oklahoma Saturday morning and was felt in as many as seven different states.
According to the USGS, the temblor was centered about 9 miles northwest of Pawnee.
PICS, VIDEO: Damage from Oklahoma earthquake
In response, the Oklahoma Corporation Commission has contacted Arbuckle disposal well operators within 725-square-mile area of the quake's epicenter, ordering them to shut down their wells.
According to OCC spokesman Matt Skinner, that includes about 37 wells.
The schedule for shut down will vary according to the well, but all wells will be shut down within 10 days.