and found the epicenters of sixty-seven small earthquakes.77 The most reliably located earthquakes were within two miles of an injection well. A July 2013 study in the Journal of Geophysical Research linked fracking-related waste injection to 109 small earthquakes that took place in a single year around Youngstown, Ohio, where an earthquake had not been previously recorded since monitoring began in the eighteenth century. The lead researcher of a similar study, published in Science, explained, “The fluids [in wastewater injection wells] are driving the faults to their tipping point.”
