Oil and gas commission investigating quakes in northeast B.C.

Honn Kao, a research scientist with the Geological Survey of Canada, said the probability is ‘very high’ that the tremors were caused by fracking

The British Columbia Oil and Gas Commission is investigating a series of earthquakes that one expert says were very likely caused by hydraulic fracturing, a fuel extraction process also known as fracking.

Earthquakes Canada reported a 4.5 magnitude quake just before 5:30 p.m. Thursday that was felt in Fort St. John, Taylor, Chetwynd and Dawson Creek in the province’s northeast. A second quake rattled the region about 45 minutes later and measured 4.0.

The oil and gas commission issued a brief statement Friday that said operations in the area were immediately shut down as a precaution and mitigation strategies will be put into place for any operations linked to seismic events.

Honn Kao, a research scientist with the Geological Survey of Canada, said the probability is “very high” that the tremors were caused by fracking, which involves injecting high-pressure liquid into the ground to extract oil and gas.

He said the survey established seismic stations in the region in 2013 and the stations automatically detected the quakes Thursday evening. It contacted the oil and gas commission, which investigated to see if there is a specific fracking operation nearby, he said.

READ MORE: 4.5 magnitude earthquake strikes near Fort St. John

“Our colleagues at the BC Oil and Gas Commission immediately realized that there was an active hydraulic fracturing operation in the vicinity of the epicentre,” he said.

He said the quakes are consistent with the pattern of fracking-induced events, and the preliminary assessment of the geological survey is that the tremors were likely caused by fracking. The geological survey and the oil and gas commission continue to investigate, he said.

“This is not 100 per cent proof … but we are continuing to work with the BC Oil and Gas Commission to get more detailed operation data.”

Geoff Morrison, B.C. manager of the Canadian Association of Petroleum Producers, said safe and sustainable natural gas development is a priority for operators in northeast B.C.

“Natural gas activity is strictly regulated and monitored, and the safety of communities located near operations is of paramount importance. We have a track record of robust regulations, employing best industry operating practices, and working to continuously improve our environmental performance,” he said in a statement.

The industry will continue to work closely with the oil and gas commission as it conducts its investigation, he added.

The commission has been monitoring induced seismicity caused by fuel extraction activities for some time. It has previously found that hydraulic fracturing and wastewater disposal can cause seismic activity.

It released two studies on induced seismicity caused by oil and gas activities, in 2012 and 2014. The most recent study found there were 231 seismic events caused by oil and gas operations in the Montney Trend, a natural gas reserve in northeast B.C., between August 2013 and October 2014.

The U.S. Geological Survey said in its tectonic summary of Thursday’s quake in northeast B.C. that there is evidence that some North American earthquakes have been triggered by human activities that have altered the stress conditions in the Earth’s crust, including fracking.

Kao said the majority of fracking does not induce earthquakes that are felt by people.

One of the reasons that fracking can cause earthquakes that are felt is because the water or fluids injected into the ground disturb naturally occurring geological faults.

In Canada, the highest recorded magnitudes of earthquakes caused by fracking are about 4.5 to 4.6, Kao said, adding that the duration of these earthquakes is short and they are usually shallow.

“Even though the preliminary assessment appears to indicate that this is an induced event, we are still working on it and making sure our analysis is as complete as possible.”

The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Laundry an essential cycle to protect Terrace firefighters from cancer

Fire hall getting a minor renovation, new washer and dryer this fall

Block party at Northern View Cannery Road Race

Terrace family top the podium in each of their racing categories

Stolen property recovered

Police briefs from Sept. 9-11

Terrace couple wins Lotto Max

Money to be put towards retirement and motorcycle trip

VIDEO: Liberals make child care pledge, Greens unveil platform on Day 6 of campaign

Green party leader Elizabeth May unveils her party’s platform in Toronto

The Northern View announces inaugural Tyee Fishing Derby in Prince Rupert

More than $7,000 up for grabs for biggest legal salmon and halibut

B.C. ends ‘birth alerts’ in child welfare cases

‘Social service workers will no longer share information about expectant parents without consent’

U.S. student, killed in Bamfield bus crash, remembered as ‘kind, intelligent, talented’

John Geerdes, 18, was one of two UVic students killed in the crash on Friday night

Free Tesla 3 offered with purchase of Surrey townhome

Century Group’s offer for Viridian development runs through Oct. 31

B.C. communities urged to improve access for disabled people

One in four B.C. residents has disability, most want to work

Sikh millworker lodges human rights complaint against Interfor, again

Mander Sohal, fired from Delta’s Acorn Mill, alleges discrimination based on religion and disability

UVic students killed in Bamfield bus crash were from Winnipeg, Iowa City

Authorities said the two victims were a man and a woman, both aged 18

Safety concerns resurface after fatal bus crash on Vancouver Island

Huu-ay-aht First Nations wants a safe route between Bamfield and Port Alberni

Most Read