Difference between “could” and “will”

One of our sharp-eyed followers caught a slight error in the story we reported this week about Tufts University and its study of earthquakes, fracking and wastewater disposal wells.

As OK Energy Today pointed out, the research showed the subsurface injection of fluids, whether it be in the fracking process or the disposal of wastewater into disposal wells “could” cause significant and rapidly spreading earthquake activity “beyond the fluid diffusion zone.”

Our story incorrectly surmised that the injection of the liquids “will” result in increased earthquake. We should have stated that the injection, just as the researchers concluded, “could” cause increased earthquake activity.