Signs in Prince Rupert point to a tsunami evacuation route in low-lying areas. (Ed Evans / the Northern View)

Tsunami warnings 101: Canada

Here are some things to know about tsunami alerts in Canada and how they work

Some residents along British Columbia’s coastline were woken by tsunami warning sirens early Tuesday morning shortly after an earthquake struck off the coast of Alaska.

Related: Vancouver Islanders ponder need for tsunami siren song

Related: ‘The tsunami alarm failed my household’: North Coast residents concerned over sirens, alerts

Here are some things to know about tsunami alerts in Canada:

— British Columbia learns about potential tsunamis from the U.S. National Tsunami Warning Center.

— The centre uses seismometers and sea level measuring stations, which send real time data to national and regional warning centres, to determine whether there’s a risk.

— After receiving notice from the U.S., federal and provincial emergency officials assess the information to determine whether it poses a threat to B.C.

— There are five levels of alerts that B.C. can send out: a warning, an advisory, a watch, an information statement and a cancellation.

— A tsunami warning means that a “flood wave” is possible and a full evacuation is suggested.

— An advisory means there will likely be strong currents and people should stay away from the shore.

— A watch means the government does not yet know how dangerous the situation is, and people should stay alert as they wait for more information.

— An information statement means an earthquake has occurred, or that a tsunami warning, watch or advisory has been issued for another section of the ocean. But in most cases, there is no threat of a destructive tsunami.

— A cancellation is issued when there’s no longer a threat.

Related: Tsunami warning cancelled for coastal British Columbia

Related: Evacuated Tofino and Ucluelet residents head home after Tsunami Warning cancelled

Related: Tsunami warning prompts evacuations in Port Alberni

The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Chaotic Metro Vancouver vote rejects Hazelmere Valley development

Accusation of ‘improper’ behaviour, after Surrey Coun. Starchuk notes receipt of ‘new information’

Langley City, Township ponder pot rules

Local politicians will have to decide on retail marijuana zoning and other issues soon.

Langley condo flipping increased as market heated up

Local realtors say investors were re-selling through assignment sales, but the trend may reverse.

Eight arrested in Surrey following fraud investigation by RCMP

Police probe focused on residence in the 18900-block of 64th Avenue

Langley MP pledges support for stranded adopting families

Mark Warawa said he will pressure the minister of immigration on the issue.

B.C. BMX kid wows GoPro with homemade video

Eight-year-old Rex Johnson wins award for inventive video

10 feet from home: B.C. grassfire offers stark reminder how quickly blazes burn

Kamloops woman among first people in B.C. to be told to evacuate home this wildfire season

Happy ending for orphaned bear cubs

Two orphaned bear cubs were captured in Castlegar and sent for rehabilitation.

Platform chosen for online B.C. cannabis sales

Ottawa-based company to create websites for when marijuana becomes legal in Canada on Oct. 17

Maple Ridge tent city resident who attacked strangers gets day in jail

Chad Edwards ordered to complete counselling for mental health and abuse of meth

UPDATE: Police say story of pretend cops ‘arresting’ woman in CRA scam fake

Vancouver police urge people not take calls from anyone saying they’re from the Canada Revenue Agency

Almost 2,400 young athletes set to compete at BC Summer Games

Full list of participants was released Friday for the Cowichan Valley event

Canucks ink Markus Granlund to one-year extension

Finnish forward’s contract is worth US$1.475 million

Warning issued as swimmer dies, boater missing this week in B.C. waters

Coroner says statistics show a spike in drownings beginning in May and rising through August

Most Read