Fracking causes minor earthquakes, B.C. regulator says

Fracking causes minor earthquakes, B.C. regulator says by The Canadian Press, September 6, 2012, CBC News
The report said no quakes were recorded in the area prior to April 2009. It said all of the events began after fracking took place. The quakes happened within five kilometres of fracking operations and within 300 metres of the depth at which the rock was being fractured. Among other things, the report recommends improvements in seismic detection in the area, further study to identify pre-existing fault lines and stronger monitoring and reporting procedures. It also calls for an examination of the relationship between hydraulic fracturing parameters and seismic activity. For instance, lower pump rates or injection volumes may be considered.