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

Port Alberni students meet federal NDP leader Jagmeet Singh at rally

Singh posts trending video to TikTok, says reaching youth on their level is important

VIDEO: Saanich resident shocked when trespasser licks security camera, rummages through mail

‘I found the situation really bizarre,’ said the Gordon Head resident

BC Ferries crew member taken to hospital after getting struck by bow doors

Two sailings between Horseshoe Bay and Departure Bay were cancelled

Hundreds come out to meet federal NDP leader at Port Alberni rally

Pipelines, a coalition government and reconciliation among topics Jagmeet Singh covers

Port Alberni receives provincial funding for food hub

Seafood processing hub will be operated by Port Alberni Port Authority

ELECTION 2019: It’s so close, it could come down to who turns out to vote

Black Press Media’s polling analyst on the origins of predictive seat modelling in Canada

Jack’s Devils beat Quinn’s Canucks 1-0 in NHL brother battle

New Jersey youngster scores first career goal against Vancouver

Two charged after owner’s wild ride through Kamloops in his stolen truck

Crystal Rae Dorrington, 37, and Derrick Ronald Pearson, 32, facing multiple charges

Judge orders credit union’s bank records for Kelowna social worker facing theft allegations

The man is accused of negligence, breach of contract, fraud and a conspiracy with Interior Savings

Leaders pour it on with rallies, boosts for candidates as campaign reaches peak

The federal election campaign has reached a crescendo

Allegations of racism lead to ministry investigation at Vancouver private school

St. George’s School was contacted over what the school describes as ‘deeply offensive behaviour online’

Not a political question: Thunberg calls for climate action in Alberta

Edmonton police estimated the size of the crowd at about 4,000

Zantac, the over-the-counter heartburn drug, pulled in Canada, U.S.

Health Canada also investigates possible carcinogen in some ranitidine drugs

B.C. public safety minister says cannabis edibles not in stores til January

Mike Farnworth says he wants regional issues considered when it comes to licensing

Most Read