An earthquake has rattled western Nebraska, but so far no injuries or property damage. The U.S. Geological Survey says a magnitude 3.6 earthquake happened around 11:30 Wednesday night. Its center was about 18 miles northwest of Hyannis. Grant County Sheriff Shawn Hebbert says some people felt the quake, saying it woke them up. The sheriff says he didn't feel a thing. There were two small earthquakes in November 2011.