The link between induced seismicity and the disposal of wastewater from unconventional oil and gas development is neither a theory nor a surprise, despite recurring media reports and seeming official uncertainty. It's as obvious as it is preventable.
More stringent regulations - on the siting of disposal wells, on wastewater injection, and of the volumes disposed - and tougher enforcement are needed in light of the nation's hydraulic fracturing-driven oil and gas boom.
What's perhaps more obvious is the need to drive to waterless, chemical-free fracking technologies that minimize or avoid this risk entirely.
When will industry practice and state/Federal regulations catch up to the obvious? When will society demand it?