Fracking Industry Shakes Up Northern BC with 231 Tremors
British Columbia's shale gas fracking industry triggered more than 231 earthquakes or ''seismic events'' in northeastern British Columbia between Aug. 2013 and Oct. 2014.
Some of the quakes were severe enough to ''experience a few seconds of shaking'' on the ground in seven areas of the province on top of the large Montney shale gas basin.
The events, many of which occurred in clusters or swarms, showed that the regulation of the industry still lags behind the pace of drilling activity in the region.
''Induced seismicity related to wastewater disposal and hydraulic fracturing within the Montney (a 29,850 square-kilometre underground siltstone formation) indicates a more uniform application of regulations is appropriate,'' concluded a December report by the BC Oil and Gas Commission.
The 32-page report states that 38 tremors were caused by the injection of wastewater produced by fracking operations and another 193 events were directly attributed to the hydraulic fracturing of hundreds of horizontal wells in the region....
http://thetyee.ca/News/2015/01/10/Fracking_Industry_Shakes_Up_Northern_BC/