The process of hydraulic fracturing, known as fracking, has recently been linked to earthquakes in Ohio, and fracking chemicals were confirmed in Wyoming groundwater just a month ago.
On Friday afternoon, The Calgary Herald reports, fracking at one oil well in Alberta caused a blowout at another oil well a kilometer away.
Fluids blasted deep into the earth under high pressure appear to have intersected underground with the second well, forcing oil up through the well bore at explosive rates.
A witness saw what appeared to be oil and chemicals spewing into the air.
"We're still not quite sure what happened," said Scott Ratushny, Midway Energy's chief executive. "We're still investigating it, but something allowed the frack to carry into the same zone, 130 to 140 metres away (underground),"
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