Quake early warning systems slowly taking shape

Seafloor sensors being installed, land-based network already activated at some schools

A Titan accelerometer is lowered to the sea floor in Barkley Canyon off Tofino to form the first node in a network of earthquake early warning sensors.

A Titan accelerometer is lowered to the sea floor in Barkley Canyon off Tofino to form the first node in a network of earthquake early warning sensors.



An undersea network of seismic sensors is slowly starting to take shape off the B.C. coast to provide early warning for Lower Mainland residents and authorities just before an earthquake strikes.

The first sensor was deployed at a depth of 850 metres in Barkley Canyon off Tofino in June by Oceans Network Canada, a non-profit company founded by the University of Victoria that got $5 million from the B.C. government to develop the network.

It’s a three-year project that aims to have a series of sea- and land-based sensors in place by March of 2019, followed by software systems to analyze and determine what type of customized warning the end user should get, depending on their location.

“Hopefully in three to five years or so we’ll be able to give you a warning to tell you to get under the table or take some safety measures before the shaking starts, which to us is the holy grail of public safety to be able to protect people from injuries and potentially save lives,” said Teron Moore, a business analyst at Ocean Networks Canada.

Advance warning is possible because the initial energy wave from an earthquake that doesn’t cause damage travels faster and can be detected well ahead of the wave of ground-shaking energy.

How much warning is possible depends on how far away a quake’s epicentre is and how close the nearest sensor is positioned to detect it and transmit the alert.

Ocean Networks Canada anticipates 60 to 90 seconds of warning can be given to populated areas of southwestern B.C. ahead of a major earthquake centred well off the coast.

It’s hoped that in future, much of the population will get enough warning from the emerging systems to take cover or even escape risky locations. Automated alerts could go out on radio and TV and through smartphone apps, Moore said.

Gas lines could be shut off and critical infrastructure could be protected. Traffic could be kept from tunnels and bridges. Elevators could automatically descend. And trains full of people or hazardous cargo could slow to a halt rather than derail at high speed.

While Ocean Networks Canada has tackled the seafloor sensors first, a group of UBC researchers has been deploying land-based sensors because they can be installed at a fraction of the cost.

They already have a working system up and running using a network of 30 ground-motion sensors that almost instantly triggers an alarm at 71 receiving sites – mainly private schools because the Catholic diocese stepped up early to support the project.

Data is available publicly on their website and alerts are also sent via a Twitter account (@EEW_BC)  and an Android phone app.

RELATED: Quake early warning system ‘worked like a charm’

UBC research engineer Kent Johansen says the Ocean Networks seafloor sensors will give more warning of an offshore quake than the nearest land-based sensors at Jordan River or Campbell River, or even additional sites being deployed at Tofino and Ahousaht.

But he said the land-based network is critical to warn of the shallower crustal earthquakes that can strike between Vancouver and Victoria and be severely damaging because of their proximity.

He pointed to a 1946 quake near Courtenay and another in 1976 off Salt Spring Island that both caused damage in Vancouver.

“They happen more often,” Johansen said, likening that scenario to the 6.3 magnitude earthquake in 2011 that severely damaged Christchurch, New Zealand.

“If we get hit by a just a six-pointer somewhere in the Strait of Georgia, it’s fatally damaging for Vancouver.”

UBC research engineer Kent Johansen. Brent Hayden photo

He said land systems could also be nearly as effective as seafloor ones in detecting a massive off-shore mega-quake.

Cascadia subduction zone quakes tend to start at one end of the fault off Oregon or Haida Gwaii and rip all the way to the other end, he said.

So the UBC team is contemplating extra distant sensor sites in Oregon and on B.C.’s north or central coast that might detect the start of such a quake earlier.

B.C. residents dropped under tables and desks Thursday morning during the Great B.C. Shake Out to drill on what to do in the event of an earthquake.

But to Johansen, such drills underscore the need for more advanced early warning systems to advise residents, beyond simply having public address systems broadcast a pre-recorded message to take cover and wait.

He imagines bored kids under school desks that get up and start wandering around a minute or two after an early warning alert arrives. “I just feel if it goes on for three minutes, school kids don’t have that kind of patience.”

Johansen aims to improve the system to provide real-time updates on whether the initial alert was a false alarm or the quake is still coming.

“It might say ‘Earthquake in progress off Tofino. Estimated time to shake 15 seconds. Please remain covered.’”

People who know it’s going to be minutes instead of seconds could decide to move somewhere safer, he said, adding he envisions a change someday to the current policy of just staying covered in place as warning systems evolve.

A crab watches as a Titan accelerometer is lowered into a special chamber in the sea floor in Barkley Canyon off Tofino to form the first node in a network of earthquake early warning sensors. Ocean Networks Canada photo.

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

Just Posted

Lisa Batstone’s appeal of her conviction and sentence for the killing of her eight-year-old daughter is set for Jan. 12, 2021. (File photos)
South Surrey mother’s murder-appeal date set

Lisa Batstone is appealing her conviction and sentence in death of eight-year-old daughter

A heavy police presence was on scene on Dec. 28, 2017 following the shooting death on Bates Road in Abbotsford of Alexander Blanarou, 24, of Surrey. (Abbotsford News file photo)
Three men charged with Abbotsford shooting death of Surrey man

Alexander Blanarou, 24, was killed in a rural area on Dec. 28, 2017

RCMP. (File photo: Phil McLachlan/Black Press Media)
Surrey RCMP recover stolen semi-trailer and its $200K of cargo

Police say the cargo was found in separate location than the trailer

A tongue-in-cheek message about wearing a face mask to curb the spread of COVID-19 on a sign outside a church near Royal Columbia Hospital, in New Westminster, B.C., on Sunday, Nov. 29, 2020. THE CANADIAN PRESS/Darryl Dyck
B.C.’s COVID-19 infection count climbs back up to 656

20 more people in hospital, active cases still rising

A man stands in the window of an upper floor condo in Vancouver on March 24, 2020. THE CANADIAN PRESS/Darryl Dyck
Change made to insurance for B.C. condo owners amid rising premiums

Council CEO Janet Sinclair says the change will mean less price volatility

Google Maps screenshot taken at 7:14 a.m.
Westbound Highway 1 lanes in Abbotsford closed as crews investigate serious cash

Crash occurred between McCallum and Riverside roads at around 4 a.m., next update at 8 a.m.

The Walking Curriculum gets students outside and connecting with nature. (Amanda Peterson/Special to S.F. Examiner)
‘Walking Curriculum’ crafted by SFU professor surges in popularity

The outdoor curriculum encourages students to connect with the natural world

Mirandy Tracy, left, and Tara Kurtz are two Langley mothers who are organizing a "sick out" for Tuesday, Dec. 1 to protest COVID conditions in schools. They're calling for masks and smaller class sizes, among other things. (Matthew Claxton/Langley Advance Times)
Politician, labour leader throw support behind student Sick Out day

Langley parents started the movement to keep kids home on Dec. 1 as a protest

A family emerged with a purchase at the Tannenbaum Tree Farm at 5398 252 St in Aldergrove on Sunday, Nov. 29, 2020 (Dan Ferguson/Langley Advance Times)
Christmas tree season is off to an early start

People are ‘bored’ with staying home due to COVID-19 and want to decorate early, farm owner believes

THE CANADIAN PRESS/Nathan Denette
B.C. researchers launch study to test kids, young adults for COVID-19 antibodies

Kids and youth can often be asymptomatic carriers of the novel coronavirus

A convoy of seven pickup trucks, six of which were hauling boats, makes its way around the Chilliwack Law Courts on Dec. 1, 2020. (Jenna Hauck/ Chilliwack Progress)
First court date for Fraser River anglers ticketed during demonstration fishery

Convoy of trucks circled the courthouse in downtown Chilliwack Tuesday honking their support

Most Read