CONWAY SPRINGS, Kan. (AP) — An earthquake with a preliminary magnitude of 4.8 that shook parts of Kansas and Oklahoma, Wednesday, was apparently also felt as far away as Omaha and Council Bluffs. The Daily NonPareil reports employees at the paper’s office building felt their chairs shake and watched as a hanging sign in the newsroom swayed without prompting. The Pottawattamie County Courthouse also reported feeling the aftershock. Omaha, Clarinda and Denison residents also said they felt the tremors.

The U.S. Geological Survey says the quake struck around 3:40 p.m. Wednesday. It had an epicenter about 8 miles south of Conway Springs, which is a town of about 1,200 people about 30 miles southwest of Wichita. It wasn’t immediately clear how much damage the quake may have caused.

The southern part of Kansas has been experiencing an upsurge in earthquakes this year. A panel commissioned by Kansas Gov. Sam Brownback found there wasn’t enough evidence to link the temblors to oil and gas exploration. The panel is recommending more study and the installation of more monitoring stations. The Federal Emergency Management Agency claims the largest reported earthquake in Kansas – a 5.5-magnitude earthquake in 1867 – could be felt in Dubuque.