California Gov. Gavin Newson, right, tours earthquake damage inside a Sears Hometown Store Saturday, July 6, 2019, in Ridgecrest, Calif. Officials in Southern California expressed relief Saturday that damage and injuries weren’t worse after the largest earthquake the region has seen in nearly 20 years, while voicing concerns about the possibility of major aftershocks in the days and even months to come. (Cal OES, Governor’s Office of Emergency Services via AP)

Recent quakes in B.C., California don’t mean ‘Big One’ is imminent, expert says

But people should still be prepared now, because there will be little warning

Although two recent earthquakes have raised fears over additional tremors in B.C., a Canadian seismologist says neither raised the risk of the “Big One.”

Honn Kao, an earthquake seismologist with Natural Resources Canada, said the timing of Wednesday’s 5.8 magnitude quake near Haida Gwaii and Saturday’s 7.1 magnitude quake in southern California was purely coincidental, as each instance was occurring along entirely different “tectonic settings.”

READ MORE: Magnitude 5.8 earthquake strikes near northern Vancouver Island

READ MORE: Southern California jolted by biggest quake in 20 years

British Columbians have long been warned to prepare for the “Big One,” a megathrust earthquake expected to hit somewhere along the Cascadia subduction zone, which runs along the west coast from northern Vancouver Island to northern California. A megathrust earthquake can occur when one tectonic plate slips under another.

“There is not a scientific basis to use the Haida Gwaii earthquake as any kind of prediction tool for any occurrence of the Big One,” Kao said, and the one in the U.S. was too far from the Cascadia zone.

But Kao said people living in B.C.’s coastal regions should still be watchful.

“On average, the megathrust earthquakes happen every 500 years,” he said. “We found that the shortest time interval between megathrust earthquakes is 250 years, while the longest interval was 800 years.”

The last megathrust earthquake happened in 319 years ago in 1700.

“We are definitely into the next cycle… so people should be well prepared for the strike of the next earthquake.”

READ MORE: Most British Columbians agree the ‘big one’ is coming, but only 50% are ready

In terms of what residents should expect, Kao pointed to the 2004 Indian Ocean Boxing Day earthquake and tsunami and the 2011 earthquake and tsunami that hit Japan.

The Indian Ocean quake came in at a magnitude of 9.1 and killed 227,898 people, while the quake in Japan hit just off the country’s eastern coast on March 11, 2011, and killed nearly 16,000.

Kao said a megathrust quake off the B.C. coast could have similar consequences, and since scientists aren’t yet able to predict such quakes before they happen, people should get prepared now.

When the “Big One” does hit, early warning systems will give people living nearby between five seconds and one minute of advance notice.

To learn about how to prepare for an earthquake or tsunami, read the provincial government’s guide.


@katslepian

katya.slepian@bpdigital.ca

Like us on Facebook and follow us on Twitter.

Just Posted

International film series returns to Chilliwack this fall

The Chilliwack International Fall Film Series at Cottonwood 4 Cinemas runs Oct. 2 to Nov. 6

Grand opening of Molson Coors Fraser Valley Brewery at Chilliwack cause for celebration

Ribbon-cutting with dignitaries, Molson brass and family marked the official grand opening

Two more on witness stand accuse former Chilliwack youth leader of sexual touching

BC Supreme Court justice rules similar fact evidence allowed in trial of Codie Anderson

East Coast comedian Ron James bringing ‘Full Throttle Tour’ to Chilliwack Cultural Centre

James is at work on the first draft of his first book, ‘All Over the Map’

Multiple accidents on Highway 1 slowing morning commutes

One accident just past 232 Street in Langley, second is just East of Bradner Street in Abbotsford

VIDEO: Drone footage documents work to free salmon at Big Bar landslide

Video shows crews working to remove rocks and wood, and transporting salmon by helicopter

Defense says burden of proof not met in double murder case against Victoria father

Closing statements begin in trial for man accused of killing daughters Christmas 2017

B.C. dog breeder banned again after 46 dogs seized

The SPCA seized the animals from Terry Baker, 66, in February 2018

Surrey mom allegedly paid $400,000 for son in U.S. college bribery scam

Xiaoning Sui, 48, was arrested in Spain on Monday night

Three dogs found shot dead in Prince George ditch

The three adult dogs appeared to be well cared for before being found with gunshot wounds, BC SPCA says

Vancouver police could be using drones to fight crime by end of year

The police department has already purchased three drones, as well as three others for training

B.C. party bus company to be monitored after 40 intoxicated teens found onboard

Police received tip teens and young adults were drinking on party buses and limousines in Surrey

B.C. cabinet minister denies that Surrey mayor’s friend attended government meeting

Surrey councillor questions Vancouver businessman Bob Cheema’s involvement in official meeting

Rick Mercer calls out Conservative candidate in B.C. for fake meme

‘Not true. All fake. Please Stop,’ tweeted Rick Mercer in response

Most Read