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

Just Posted

EDITORIAL: Managing wildfires

Wildfires have the potential to cause significant damage within our province

Car show a hit at Vernon retirement resort

GALLERY: No drooling over the classic cruisers parked at Parkwood Retirement Resort

GALLERY: Vernon painter captures beauty of Davison Orchards in new series

In a new painting, card series, artist Patricia Lawton was inspired by resident dog, Harlow

Okanagan, Creston cherry and apple farms in need of workers

The worker shortage is due to the COVID-19 restrictions on international travel

‘It’s just my job’: Off-duty Lake Country-born paramedic saves choking girl downtown Penticton

Family vacationing in Penticton assisted by off-duty paramedic, who helps save 13-year-old

53 new COVID-19 cases, no new deaths cap off week of high infection rates in B.C.

Roughly 1,500 people are self-isolating because they either have COVID-19 or have been exposed to it

Pup stolen from Vernon temporary shelter reunited with owner

Nicola Sanders says her son’s puppy was ‘overjoyed’ to see her owner again

Moving on: Tanev scores 11 seconds into OT as Canucks oust Wild

Vancouver beats Minnesota 5-4 to move into first round of NHL playoffs

Number of Kelowna-linked COVID-19 cases grows to 159

Interior Health reported four new cases region-wide on Friday, 18 remain active

Gene editing debate takes root with organic broccoli, new UBC research shows

Broccoli is one of the best-known vegetables with origins in this scientific haze

VIDEO: U.S. Air Force pilot does fly-by for B.C. son amid COVID border separation

Sky-high father-son visit plays out over White Rock Pier

3 Vancouver police officers test positive for COVID after responding to large party

Union president says other officers are self-isolating due to possible exposure

New mothers with COVID-19 should still breastfeed: Canada’s top doctor

Dr. Theresa Tam made the recommendation during World Breastfeeding Awareness Week

Collapse of Nunavut ice shelf ‘like losing a good friend:’ glaciologist

The ice shelf on the northwestern edge of Ellesmere Island has shrunk 43 per cent

Most Read