The USGS shows all three earthquakes struck within a 12-hour window.
The first quake struck just before 6:30 p.m. yesterday.
It was a 2.8 magnitude near Ninnekah, Oklahoma, just south of Chickasha.
Harrah is just east of Chocktaw.
Just over an hour later, the second quake, a 3.4 magnitude, hit near Harrah, OK.
The third quake was a 3.1 magnitude that hit just southwest of Tuttle, OK.
None of these quakes caused any damage or injuries.
In fact, a 3.0 magnitude is the smallest quake that is even noticeable by humans.