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

VIDEO: Organization’s stolen wheelchair van recovered on backroad near Hope

Wheelchair accessible van is only transportation for some people in Hope and Fraser Canyon

Police ask public’s help locating missing Hope woman

Penelope Leslie Lackey has not contacted her family since mid-June

Get a free sneak peek at modern ballet performance in Chilliwack

New ballet @giselle is putting the final touches on its show at the Chilliwack Cultural Centre

Rescuers pluck climbers off rock face near Mt. Slesse

Chilliwack SAR team members used long-line suspension to assist climbers

Evacuation route out of Harrison inches forward

The District of Kent approved a nearly $19,000 proposal to look at three routes out of the village

VIDEO: Could we BE any more excited? ‘Friends’ fans go crazy for merch

Movie theatres will show select episodes to mark the NBC series’ 25th anniversary

Bodies of two missing Surrey men found near Ashcroft

Ryan Provencher and Richard Scurr have been missing since July 17

Officials say 50 Oppenheimer Park residents have agreed to leave, as deadline looms

Residents have been told they must be gone by 6 p.m. on Aug. 21

Five hedgehogs quickly adopted after being left at BC SPCA

Lucky new owners picked up their pets from Maple Ridge branch on Aug. 20

B.C. cricket players get interrupted by racist remark

Community has had protocols in place for years to respond to prejudice

Groovy B.C. wedding a throwback to Woodstock ‘69

Couple hosts themed wedding 50 years after legendary festival

‘Do the right thing,’ implores sister of South Surrey stabbing victim

IHIT confirms male arrested in connection with Paul Prestbakmo’s death no longer in custody

Nearly 50% of Canadians experience ‘post-vacation blues’: poll

48 per cent of travellers are already stressed about ‘normal life’ while still on their trip

Most Read