BBC: New research suggests that fracking is not a significant cause of earthquakes that can be felt on the surface.
UK scientists looked at quakes caused by human activity ranging from mining to oil drilling; only three could be attributed to hydraulic fracturing.
Most fracking events released the same amount of energy as jumping off a ladder, the Durham-based team said.
They argue that the integrity of well bores drilled for fracking is of much greater concern.
The research is published in...