(SPARKS, Okla.) -- A second earthquake shook Oklahoma on Saturday night, nearly a day after a 4.7 magnitude quake struck the state.
The U.S. Geological Survey says the Saturday earthquake occurred at 10:53 p.m. with its epicenter close to Sparks, a small town 44 miles from Oklahoma City. Shakes were reportedly felt in several states including Illinois, Texas and Arkansas.
The 5.6 magnitude quake, which is the largest to ever hit the state, shook buildings but evidence of major structural damage may not be known until officials complete assessing affected areas. Inital damage reports include the buckling of at least two sections of a highway.
The quake, with a shallow depth of 3.1 miles, produced several afteshocks on Sunday.
No injuries were reported from both earthquakes and aftershocks.
Copyright 2011 ABC News Radio