"McDONALD, Ohio - Officials said Saturday they believe the latest earthquake activity in northeast Ohio is related to the injection of wastewater into the ground near a fault line, creating enough pressure to cause seismic activity.
The brine wastewater comes from drilling operations that use the so-called fracking process to extract gas from underground shale. But Ohio Department of Natural Resources Director Jim Zehringer said during a news teleconference that fracking is not causing the quakes."
The Associated Press had the story January 1, 2012.
SEE ALSO:
"Disposal Halted at Well After New Quake in Ohio" (New York Times)
Source: AP, 01/02/2012