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

Lake Country still investigating cause for water main break

Over 2,500 residences and businesses in Lake Country and Kelowna remain under boil water notice

Housing provided for women and children fleeing violence in Penticton

Announcement on Friday is part of a provincewide initiative to construct additional housing.

Kelowna RCMP raid home on Lawson Avenue

RCMP, Emergency Response Team execute search warrant, one man arrested

Friend of accused Kelowna murderer takes the stand

Elrich Dyck’s testimony continued Friday with details from the night Chris Ausman was killed

Developer breaks ground on downtown Kelowna rental housing project

Apartments at 726 Clement Ave. are projected to cost $1,300 per month or $1,780 per month

New airline regulations bring compensation for tarmac delays, over-bookings

Some of the new regulations will roll out in July, while others are expected for December.

Sit-in on Saturday will protest move to curb loitering in Penticton’s downtown

Nanaimo Square Sit-In is taking place from 10 a.m. to 2 p.m.

Crews respond to smoke at Penticton thrift store

The rooftop A/C unit began filling the building with smoke, prompting them to evacuate

People’s Party of Canada leader talks B.C. trade to Penticton supporters

Maxime Bernier, head of the new federal political party, spoke at Time Winery on Friday

Princeton RCMP recover stolen homework and save the grade

It’s a slightly better excuse than “the dog ate my homework.” Earlier… Continue reading

New Summerland distillery has received recognition

Alchemist Distiller won audience choice award at recent competition

Scheer says it would take Conservatives five years to balance budget

Scheeraccused the Liberal government of spending $79.5 billion of previously unbudgeted funds

Vancouver woman sexually assaulted after man follows her home; suspect at large

Police are looking for an Asian man in his 40s after the incident on Vancouver’s east side.

B.C. man, 30, arrested for driving his parents’ cars while impaired twice in one day

The Vancouver-area man was arrested after officers caught him driving impaired twice in one day

Most Read