A major earthquake rattled Oklahoma and was felt in several other states about 7 a.m. Saturday morning.

Aftershocks are expected today after a major earthquake rattled Oklahoma and was felt in several other states about 7 a.m. Saturday.

The USGS has confirmed the quake was a 5.6 magnitude and was centered about 8 miles northwest of Pawnee, which is in Pawnee County north of Lincoln County.

Within moments of the quake, many were leaving comments on Facebook and other social media as many sleeping residents were awakened by the quake.

Many were saying it was the biggest earthquake they had ever felt. The record-setting Prague earthquake in 2011 also was a 5.6 magnitude.

The earthquake was reportedly felt in at least seven states -- Texas, Kansas, Arkansas, Iowa and Missouri are among them.

Shawnee/Pottawatomie County Emergency Management Director Don Lynch said crews are out collecting data on any possible damages.

"It was a 5.6 centered 8 miles NW of Pawnee. It certainly felt like a longer duration also," he said. "We've had folks out checking. The only visible damage found... was a dip in the pavement southbound on Harrison Street on the outside lane in the vicinity of Joe Cooper Chevy."

Some of the local Facebook comments include:

Donna Chance: Hearing Tecumseh never thought it was going to stop shook my whole house that was a big one.

Patricia Lincoln: Earlsboro had stuff falling off tv stand had to hold flat screen so it wouldn't fall

 Angels Fury: felt it was fixing to drag my daughter out of the house. Woke me up from a dead sleep. That was a big one! Hope no crazy after shocks.

Robyn Jones Watkins: McLoud. I have stuff that fell off my walls and glasses that fell out of cabinet. Cracks in walls.

Danielle White: Have family in Ponca city and Arkansas say they felt it as well as on the west side of OKC.

Watch for updates.