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

Driver of vehicle down 90-foot embankment rescued on Highway 5 near Hope

Rope rescue conducted on mutual-aid call with Chilliwack SAR, Hope SAR and Agassiz fire department

Missing man located in Harrison Mills

Social media helps track down missing man

B.C. BUDGET: Fare freeze, free travel for seniors on BC Ferries

A complete fare freeze will be put into place on major routes, and fares will be rolled back on smaller routes by 15 per cent

BC BUDGET: New spaces a step to universal child care

Fees reduced for licensed daycare operators

BC BUDGET: NDP cracks down on speculators, hidden ownership

Foreign buyers’ tax extended to Fraser Valley, Okanagan, Vancouver Island

Karate classes delight Agassiz and area youngsters

New karate club gives kids exercise, confidence

How to keep local news visible in your Facebook feed

Facebook has changed the news feed to emphasize personal connections. You might see less news.

Condition of the Coquihalla concerning for tourists

“They don’t make a show called Highway to Hell for nothing…”

Canucks blow three goal lead, lose to Avalanche in overtime

Vancouver struggled on the penalty kill, as Colorado scored all five goals on the powerplay

Widow of avalanche victim sues Golden lodge operator

A woman from Alberta is suing guides, their mountain guide association and the lodge operator for negligence

BC BUDGET: NDP hope to nix court delays with $15 million cash influx

Union says funding could stop sheriffs from leaving for higher paid jobs

Cattlemen urge B.C. to prevent erosion caused during 2017 wildfire season

Other concerns are fencing restoration and repair, and a lack of feed for cattle.

Patrick Brown’s Tory leadership bid fate looms

Brown’s bid to for Tory leadership to be decided on Wednesday

Most Read