Shuswap earthquake minor compared to 6.0 shaker of 1918

Strongest quake on record for South Interior took place 150 kilometres north of Revelstoke

The 2.2 magnitude earthquake that shook Salmon Arm residents on Saturday, March 2 was a mere ripple compared to past quakes that have rattled the Southern Interior.

The most powerful quake to hit the region shook the ground on Feb. 4, 1918. The epicentre of the 6.0 magnitude quake was near the current location of the community of Mica Creek, approximately 150 kilometres north of Revelstoke.

Although the quake’s centre was in a remote area on the west slope of the Rocky Mountains, earthquake seismologist Taimi Mulder said it would have made its presence known far and wide.

Read More: No aftershocks expected after Shuswap earthquake

Mulder, who works for the Geological Survey of Canada, a division of Natural Resources Canada, said people in the Okangan and Shuswap definitely would have felt the quake.

“When you’re further away the high frequencies attenuate and you get longer lower frequencies. It gets to feel a little bit more like a rolling motion,”

Mulder said at 150 kilometres from an earthquake the size of the one that hit in 1918, people definitely would have experienced rattling dishes and swaying chandeliers in their homes. Closer to the quake, high frequency shaking would have been felt for between 15 and 30 seconds.

Based on current building codes, damage to structures begins happening at a 5.5 magnitude or more. Mulder said damage caused by a quake of this strength would have been localized to an area 10 to 20 kilometres from the epicentre.

A 5.0 magnitude quake, the second most powerful to hit the region, was recorded southwest of Kamloops near Lytton on Sept. 22 1926.

The most powerful quake since the turn of the century was recorded on Aug. 17, 2002, with a magnitude of 4.5. Its epicentre was less than 100 km due west of Kelowna.

Read More: Small earthquake felt throughout the South Okanagan

The most recent quake to make Earthquakes Canada’s top 10 list for the region took place on Sept. 10, 2016. The 4.1 magnitude quake’s epicentre was south-east of Penticton. The Penticton Western News reported the quake shook the ground at 9:16 a.m., originating from an epicentre 21 km north-east of Osoyoos and five kilometres deep.


@SalmonArm
jim.elliot@saobserver.net

Like us on Facebook and follow us on Twitter

Earthquake

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Comments are closed

Just Posted

Salmon Arm Council pleased with plans for Habit for Humanity housing project

Twenty-unit building, mainly for 55-plus seniors, in the works

B.C. highway widening job reduced, costs still up $61 million

Union-only project scales back work to widen Trans-Canada

Salmon Arm pool to reopen for limited programming, not drop ins

Strict sanitization protocols in place including one-hour closure between scheduled swims

Vehicle incident stalls traffic on Highway 1 east of Salmon Arm

Drive BC reports road closed, assessment underway

Sicamous business duo broaden downtown beach vibe

Jody Boychuk and Eddy Johnston enjoying bigger, brighter Sicamous location

Lower Mainland woman says llama farming neighbour shot her 11-month-old pup

Young dog was on owner’s Maple Ridge property when it was killed on June 21

B.C. records 31 new cases, six deaths over three days due to COVID-19

There are 166 active cases in B.C., 16 people in hospital

Police issue warning after baby comes across suspected drugs in Kamloops park

The 11-month-old girl’s mother posted photos on social media showing a small plastic bag containing a purple substance

Kamloops man pleads guilty in vehicle-ramming incident that injured a Mountie

Adam Hibbert was arrested following a collision during a police pursuit on May 26, 2019

Greater Victoria nanny pleads guilty to child porn, sexual interference charges

Johnathon Lee Robichaud pleaded guilty to slew of sex crimes

Victoria man dies after skydiving incident on Vancouver Island

34-year-old had made more than 1,000 jumps

Most Read