Fracking linked to Alberta earthquakes, study indicates

Carmen Langer had just left his bed to grab a drink of water when he felt his house northeast of Peace River, Alta., begin to shake.

At first I thought I wasnt feeling very good that day... and it was just my blood sugar, but no, it shook pretty good, Langer said about the Nov. 2 incident.

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Moments afterthe shaking stopped, his neighbours were calling, asking if he had felt what they just felt.

After a few minutes, I realized it was an earthquake, Langer said.

Natural Resources Canada (NRCan) registered a small, 3.0-magnitude earthquake that was lightly felt from Three Creeks to St. Isidor in northern Alberta at 11:14 p.m. MT. NRCan said on its website there were no reports of damage, and that none would be expected.

Jeff Gu, a seismologist at the University of Alberta, said the earthquake could have been caused by shifting rock formations in the region but addedthere could be another possible explanation.

Certainly that region is not immune to earthquake faulting, but I would say having actual earthquakes in that area is relatively recent, relatively new, he said.

Gu is one of three authors ofa recently published study in the Journal of Geophysical Research, a peer-reviewed publicationthat looked at four years of earthquake data around Rocky Mountain House. The study concludes that waste-water injection into the ground is highly correlated with spikes in earthquake activity in the area.

It is the first study of its kind conducted in Canadathat links industrial activity to induced earthquakes.

The conclusionwas that the industrial activities could, in some cases, potentially trigger or facilitate earthquake occurrences, Gu said.

Alberta earthquakes increasing

Since 1985, fewer than 15 earthquakes above a 3.0magnitudehave been recorded anywhere in Alberta, according to the Alberta Geological Survey's website. There has been an increase inearthquake activity since the 1960s, the organization says.

The Peace River earthquake is not the only one that has shaken the province in the past few months:

• In October, a2.7-magnitude quake was recorded about four kilometres southwest of Banff.
• In August, a 4.3-magnitude earthquake was registered near Rocky Mountain House, causing about 500 customers in the area to lose power for several hours.

Gu said the research into whether waste-water induction and frackingare related to earthquakesis still really a work in progress.

There has been more and more evidence, increasing evidence, in the last few years in particular in Arkansas, in Texas and actually more recently here, Gu said.

But he saidthere is nothing to fear right now.

Im not worried until we get a conclusive answer on whether these are caused by industry or not, whether they are naturally occurring, Gu said.

Langer, however, is worried.

With all the stuff thats going on in my community, Im feeling quite concerned about it, he said. Were having all kinds of environmental problems in the community Something has to give here.