Did you feel that?
A Magnitude 4.2 earthquake shook Oklahoma and Kansas at 7:57 a.m. Friday.
It was centered near Manchester, Oklahoma - which is about 2.5 hours northwest of Tulsa.
The USGS initially reported the earthquake as a M4.5, but that number was later revised.
So far, there have been no damage reports.
The USGS reported another earthquake, a M1.9, about an hour later in the same area.