Earthquakes are common in the world
Seismic Intensity scale (intensity or severity of ground shaking at a given location) may be small or large but earthquakes are NOT an unusual phenomena especially on earthquake belts (plate boundaries) where the most earthquakes occur.
Other than “ground shaking” there are other hazards that could occur during or after the earthquakes depending on its impact.
- Ground displacement (ground moving)
- Flooding from damaged dams or pipelines, and levees along a river
- Power Outage
Understanding possible hazards around your area will help you understand what needs to be prepared during an earthquake.
Earthquakes in Canada
Canada is no exception. According to Canadian Encyclopedia, there are about 4,000 earthquakes reported in Canada each year. Among those 4,000 reported, around 3,000 are from British Columbia. Also, there are evidences of multiple destructive earthquakes with around magnitude 9.0 in the last 10,000 years on the Cascadia Subduction Zone (600-mile stretch between Vancouver Island, British Columbia and Cape Mendocino, California) in a repeated cycle of 234 to 526 years.
The last known +M8 earthquake along Cascadia subduction zone had occurred in 1700. Considering the plate activities and earthquake cycles of the last 10,000 years, some experts say the next megathrust earthquake could strike again anytime as it has been over 320 years since 1700.