9 a.m. Friday morning, USGS confirmed that a 4.0 magnitude Oklahoma earthquake ratttled parts of the "Sooner State". 

They reported that the earthquake hit around 9:18 a.m. Friday about 3 miles northeast of Jones, OK. 

Ryan Dragg says he was jolted by the quake where he works on the ninth floor of the VA Medical Center in Oklahoma City. He says he and a co-worker briefly left the building.

A 2.8 magnitude quake was also recorded in the area at 11:16 p.m. Sunday and a 3.3 quake was recorded at 4:05 a.m. Thursday.

Quakes of magnitude 2.5 to 3 are generally the smallest felt by people.

According to the U.S. Geological Survey, Oklahoma falls in what's called the Stable Continental Region.