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

Higher gas tax to help fund transit in Greater Victoria

You’ll be paying an extra two cents per litre at the pump starting April 1, 2018

James Bay residents face six-week long construction dig for sewage pipe

Niagara Street closed to vehicles as pipe assembly and installation connects Ogden Point to McLoughlin Point

‘Pendulum’ swings Indigenous arts onto the Belfry Theatre stage

From contemporary to traditional, ‘it’s a magic show’ says Indigenous Artist in Residence

Victoria cannabis advocates call proposed trust fund an ‘overreach’

BCICA says North Saanich councillor’s ideas on cannabis ‘cherry picking’

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

VIDEO: Top 10 B.C. budget highlights

The NDP is focusing on childcare, affordable housing and speeding up the elimination of MSP premiums

Walmart partners online grocery service to bring Vancouver home delivery

Move expands upon similar efforts announced last November to grow home delivery service

Alpha dog leads VicPD officers to arrest

Victoria Police Department’s K9 Unit sniffing out crime

BC Wine Institute to take legal action against Alberta

The BC Wine Institute to seek injunction to protect B.C. wineries from Alberta wine ban

BC BUDGET: Tobacco tax hike may light up black market in smokes

NDP government adds another 56 cents per pack as of April 1

4 treatment centres to open in memory of B.C. teen who died of an overdose

A treatment centre for addictions is opening in Penticton after the first one fell through

Snow in the forecast for Vancouver Island

Environment Canada is calling for up to four centimetres of snow to fall Wednesday

BCHL Today: Merritt peaking at right time and Taylor signs with UNH Wildcats

BCHL Today is a (near) daily look at what’s going on around the league and the junior A world.

VIJHL playoffs: Cougars look to pounce on Coutre and the Wolves

Hockey series a rematch from last season’s opening round

Most Read