This sounds great, my biggest concern would be that it's basically the same mechanism as "fracking," but likely minus some of the more esoteric chemicals and th

This sounds great, my biggest concern would be that it's basically the same mechanism as "fracking," but likely minus some of the more esoteric chemicals and the sand. What are the chances of this having similar seismic impacts with the injection of water at those depths - is there already a significant amount of water down there so the net effect would be replacement of the increased volume of the system's interior? Is the nature of the area involved such that adding water is going to lubricate existing fault lines? Part of the concern with this is whether we're going to start seeing a significant volume of earthquakes in areas where building codes don't and haven't traditionally required the kind of safety features found in more seismically active areas.