Washington Post: Does fracking for natural gas cause earthquakes

Does hydraulic fracturing to obtain natural gas cause earthquakes?

Yes.

Every time humans apply or remove pressure from rock formations or dig a big hole in the ground, there’s at least a small risk of a seismic result. That does not mean that people should stop digging holes or extracting valuable resources — especially those that could have real environmental benefits — just that industry and government should apply some sensible caution.  MORE