Fracking has been put on hold (new wells) in nearby Arkansas due to belief it was causing earthquakes near Guy,AR. Just sayin’. Also problems with fracking in Penn/NY State. Although problems there pollution related, not earthquake.
After the producing well has been fracked, the fracking fluid is disposed of by pumping it down the disposal wells aka injection wells.
The state agency has put a hold on using those few disposal wells that they think are causing the quakes.