Central Oklahoma was shaken by a 5.6-magnitude earthquake Saturday night, less than 21 hours after a 4.8-magnitude temblor, officials said.The 10:53 p.m. quake was centered about 4 miles east of Sparks, Okla., and 44 miles north-northeast of Oklahoma City at a depth of 3.1 miles, the U.S. Geological Survey said. The 4.8-magnitude quake came at 2:12 a.m. about 6 miles southeast of Sparks.\"The picture by the TV fell off the wall and we jumped up because we thought somebody had hit the house,\" Noeh Morales told The Oklahoman newspaper in Oklahoma City after the latest quake.\"It was like a roaring noise. I\'ve never one that bad over here.\"It woke me out of a dead sleep. I felt the whole house shaking. I jumped and ran outside to see what was going on.\"The early-morning quake had been followed by at least 40 aftershocks up to magnitude-3.4, Oklahoma Geological Survey seismologist Austin Holland told The Oklahoman.At 5.6-magnitude, the evening temblor surpassed a 5.5-magnitude quake near El Reno in 1952.