The theory is that the wastewater is creating friction in dormant rifts, thereby inducing earthquakes that never would have happened, otherwise. Before 2008, Oklahoma experienced only a handful of quakes. By 2010, the state was experiencing "earthquake swarms" totaling more than 1,000. Other states, including Ohio, Arkansas, Kansas, Colorado and Texas, have also suddenly become earthquake zones. The common denominator is wastewater disposal from fracking.