Since the Halliburton Loophole of 2005, there has been a dramatic upturn in seismic activity, especially in the vicinity of fracking and waste injection well operations.
Some rationalize that the injection wells may be more damaging than just continued oil and gas fracking exploration, when both unavoidably contaminate water.
Others are concerned about the overall location of these spates of earthquakes in relationship to the deformed and North American Cratons.
Further expansion are expressed as concerns about peripheral Craton faults and fractures linking super volcanoes like Valle Grande and Yellowstone.