Mount Cayley - Volcanic Hazards

Volcanic Hazards

Volcanic eruptions in Canada rarely cause fatalities because of their remoteness and low level of activity. The only known fatality due to volcanic activity in Canada occurred at the Tseax Cone in 1775, when a 22.5 kilometres (14.0 mi) long basaltic lava flow traveled down the Tseax and Nass Rivers, destroying a Nisga'a village and killing approximately 2,000 people by volcanic gases. Many towns and cities near Mount Cayley are home to well over half of British Columbia's human population, and there is a likelihood that future eruptions will cause damage to populated areas, making Mount Cayley and other Garibaldi belt volcanoes a major hazard. There are significant hazards from Canadian volcanoes that require hazard maps and emergency plains. Volcanoes which exhibit significant seismic activity, such as Mount Cayley, appear to be most likely to erupt. A significant eruption of the Garibaldi belt volcanoes would significantly impact Highway 99 and communities like Pemberton, Whistler and Squamish, and possibly Vancouver.

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