From late 2007 to late 2010, one well integrity violation was issued for every six deep injection wells examined — more than 17,000 violations nationally. (scientificamerican.com)
It was only after deep injection disposal wells used to house fracking's toxic wastewater went into operation that the earthquakes started. (desmogblog.com)
Wastewater created during oil and gas production and disposed of by deep injection into underlying rock layers is the probable cause for a surge in earthquakes in southern Kansas since 2013, a new report in the Bulletin of the Seismological Society of America concludes. (sciencedaily.com)