Team members from Simon Fraser University work on a study of fumaroles, or gas vents, on Mount Meager in Lillooet, B.C., in a 2016 handout photograph. THE CANADIAN PRESS/HO-SFU, Gioachino Roberti, *MANDATORY CREDIT*

Team members from Simon Fraser University work on a study of fumaroles, or gas vents, on Mount Meager in Lillooet, B.C., in a 2016 handout photograph. THE CANADIAN PRESS/HO-SFU, Gioachino Roberti, *MANDATORY CREDIT*

Climate change, receding glaciers increase landslide risk on B.C.’s Mount Meager

Climate change is causing glaciers atop Mount Meager, in British Columbia, to shrink increasing the chances of landslides and even a new eruption, says one expert.

Climate change is causing glaciers atop Mount Meager in British Columbia to shrink, increasing the chances of landslides and even a new eruption, says an expert studying the volcano.

Glyn Williams-Jones, a volcanologist from Simon Fraser University in Burnaby, B.C., has been studying the fumaroles, or gas venting, of water vapour, carbon dioxide and hydrogen sulphide from the volcano for about two years. He and his team of students are also examining the increased risk of landslides caused by receding glaciers on the volcano.

Williams-Jones said the release of the gases worries him.

“The reason those fumaroles are coming, we believe now, is not because the volcano is more active but rather because of warming climate … those glaciers have been getting thinner,” he said. “There is this interplay between climate, ice-covered volcano and the response of those volcanoes.”

The churning gases don’t mean an eruption is imminent, he said, but the volcano is definitely not extinct.

Mount Meager is northwest of Whistler and was the last volcano in British Columbia to have a large explosive eruption, which was 2,400 years ago.

“That’s a blink of an eye in geological terms,” Williams-Jones said.

Read more: Ignoring climate change poses potential catastrophe for B.C.

Read more: Canada not slowing emissions from oil and gas: environmental groups

Volcanoes have their own characteristics and personalities, he said.

“It is a grumpy volcano in the sense that it has had some very large eruptions and also had these extremely large landslides. So I’d say yes, it’s on the grumpy side.”

Mount Meager has been forming over the last two million years, so it can be thought of as ”multiple volcanoes old,” each sitting on top of each other, he said.

It is surrounded by ice and glaciers and the presence of a well-known hot spring nearby is evidence of its activity, he said.

Heat from the volcano and warming temperatures are thinning the glaciers, changing the way water moves through the rocks, he added.

The water’s movement and the acidic nature of the volcanic gases makes the rock of the volcano ”rotten” and unstable, William-Jones said.

The slope of the volcano is moving northwest at the rate of about three centimetres a month, which increases the potential for a landslide, he said.

A landslide in 2010 from Mount Meager unleashed about 53 million cubic metres of rock and created a dam on Meager Creek about 300 metres wide and two kilometres long.

About 5,000 people downstream were evacuated because of the threat of a rapid release of the lake that formed behind the dam.

William-Jones said it’s possible the next landslide could be 10 times that size, with the greatest threat to residents of the Pemberton Valley.

If that happens, the change in pressure could destabilize the magma chamber beneath the volcano leading to an eruption, he said.

“There are a lot of big ifs and a lot of dominoes would have to line up for that to happen but we think this is a plausible thing to be concerned about.”

Williams-Jones said he’s not being alarmist, but there’s a need for monitoring and government attention.

He couldn’t say if or when the volcano would erupt, a calculation made even more difficult by the lack of data.

“The thing about volcanoes is that they’ve got their own personalities and they’re extremely unpredictable,” William-Jones said. “To say when Meager is going to reactivate is anyone’s guess. Even the best monitored volcanoes can catch you unawares and by surprise.”

Williams-Jones was at the site in September and said looking down into the mouth of the volcano is like looking into a cave about 50 metres long and 30 metres wide. The ice is about 100 metres at its thickest and gets down to about 50 metres as it thins around the caves.

There is no ”mouth of hell” with a big, glowing, red or orange mass of lava, he said.

“What you’re looking at is this inclined opening with steam and gas pouring out. And melting water from the ice pouring down into it,” he said.

Hina Alam, The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Harrison Hot Springs country singer Todd Richard poses for a photo with Mission firefighters. (Photo/Sarah Plawutski)
VIDEO: Harrison country artist Todd Richard plans for a busy, rockin’ summer

Richard and his band look to live shows as restrictions start to lift

The theme for this year’s Fraser Valley Regional Library Summer Reading Club is “Crack the Case” and Katie Burns, community librarian at the Chilliwack Library, is encouraging people of all ages to sign up. She is seen here at the Chilliwack Library on Friday, June 18, 2021. (Jenna Hauck/ Chilliwack Progress)
Crack the case, read, win prizes with FVRL Summer Reading Club

‘Immerse yourself in other worlds and have a bit of fun while you do it,’ says Chilliwack librarian

Police tape is shown in Toronto Tuesday, May 2, 2017. Statistics Canada says the country's crime rate ticked up again in 2018, for a fourth year in a row, though it was still lower than it was a decade ago. THE CANADIAN PRESS/Graeme Roy
CRIME STOPPERS: ‘Most wanted’ for the week of June 20

Crime Stoppers’ weekly list based on information provided by police investigators

Cpl. Scott MacLeod and Police Service Dog Jago. Jago was killed in the line of duty on Thursday, June 17. (RCMP)
Abbotsford police, RCMP grieve 4-year-old service dog killed in line of duty

Jago killed by armed suspect during ‘high-risk’ incident in Alberta

Kalyn Head, seen here on June 4, 2021, will be running 100 kilometres for her “birthday marathon” fundraiser on July 23. (Jenna Hauck/ Chilliwack Progress)
Woman’s 100-km birthday marathon from Chilliwack to Abbotsford will benefit Special Olympics B.C.

Kalyn Head hopes run raises awareness, advocates for inclusion of people with intellectual disabilities

Marco Mendicino, Minister of Immigration, Refugees and Citizenship during a press conference in Ottawa on Thursday, May 13, 2021. THE CANADIAN PRESS/Sean Kilpatrick
Canada to welcome 45,000 refugees this year, says immigration minister

Canada plans to increase persons admitted from 23,500 to 45,000 and expedite permanent residency applications

(Black Press Media files)
Burnaby RCMP look for witnesses in hit-and-run that left motorcyclist dead

Investigators believe that the suspect vehicle rear-ended the motorcycle before fleeing the scene

Blair Lebsack, owner of RGE RD restaurant, poses for a portrait in the dining room, in Edmonton, Friday, June 18, 2021. Canadian restaurants are having to find ways to deal with the rising cost of food. THE CANADIAN PRESS/Jason Franson
Canadian restaurateurs grapple with rising food costs, menu prices expected to rise

Restaurants are a low margin industry, so there’s not a lot of room to work in additional costs

RCMP crest. (Black Press Media files)
Fort St. John man arrested after allegedly inviting sexual touching from children

Two children reported the incident to a trusted adult right away

A police pursuit involving Abbotsford Police ended in Langley Saturday night, June 20. (Black Press Media file)
Abbotsford Police pursuit ends in Langley with guns drawn

One person arrested, witnesses say an officer may have been hurt in collision with suspect vehicle

(file)
Pedestrian hit by police vehicle in Langley

Injuries described as serious, requiring surgery

Barbara Violo, pharmacist and owner of The Junction Chemist Pharmacy, draws up a dose behind vials of both Pfizer-BioNTech and Oxford-AstraZeneca COVID-19 vaccines on the counter, in Toronto, Friday, June 18, 2021. An independent vaccine tracker website founded by a University of Saskatchewan student says just over 20 per cent of eligible Canadians — those 12 years old and above — are now fully vaccinated. THE CANADIAN PRESS/Nathan Denette
At least 20% of eligible Canadians fully vaccinated, 75% with one dose: data

Earlier projections for reopening at this milestone didn’t include Delta variant

This undated file photo provided by Ernie Carswell & Partners shows the home featured in the opening and closing scenes of The Brady Bunch in Los Angeles. Do you know the occupation of Mike Brady, the father in this show about a blended family? (Anthony Barcelo/Ernie Carswell & Partners via AP, File)
QUIZ: A celebration of dad on Father’s Day

How much do you know about famous fathers?

Emily Steele holds up a collage of her son, 16-year-old Elijah-Iain Beauregard who was stabbed and killed in June 2019, outside of Kelowna Law Courts on June 18. (Aaron Hemens/Capital News)
Kelowna woman who fatally stabbed teen facing up to 1.5 years of jail time

Her jail sentence would be followed by an additional one to 1.5 years of supervision

Most Read