Modelled tsunami would take 20 minutes to reach Vancouver Island — study
Modelling shows the wave amplitude in Esperanza Inlet and Nootka Sound following a hypothetical 9.0 magnitude earthquake in the Cascadia Subduction Zone. Photo courtesy Ocean Networks CanadaPeople living on the west coast of Vancouver Island would have about twenty minutes before a tsunami hit, if there were a magnitude 9.0 quake in the Cascadia Subduction zone, researchers found.
The research was conducted by Ocean Networks Canada, which has undertaken several tsunami hazard assessment projects on the west coast. Through modelling and drawing on Indigenous knowledge as well as accounting for various potential sea level rise scenarios, the researchers were able to determine the warning time and height of the waves for the western portion of the Island.
“The impact of the locally generated tsunami is more significant in Boundary Bay, Port Alberni, and Northwest Vancouver Island, while a tsunami originating in Alaska would have greater impacts in Prince Rupert and Haida Gwaii,” the paper says. Indigenous Peoples have been living in tsunami risk areas for millennia, and have valuable knowledge and experience. Researchers highlighted Indigenous experiences as “critical for understanding current and future risks and implementing mitigation plans.”
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