Fracking is very active in Oklahoma. The Woodford Shale Play serves as one of the formations that are used for fracking. Two very active areas are the SCOOP and STACK. The SCOOP is the South Central Oklahoma Oil Province, while the STACK is the Sooner Trend Anadarko Basin Canadian and Kingfisher Counties. Oklahoma has noticed increased seismic activity that is thought to be related to the fracking activity in the state.