Recent seismicity (last 5 years) in the Vancouver Island Region (Natural Resources Canada 2010)

Recent seismicity (last 5 years) in the Vancouver Island Region (Natural Resources Canada 2010)

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Comprehensive risk assessments are fundamental to effective emergency management. These assessments need to identify the range of hazards (or perils) an entity is exposed to and quantify the specific threats associated with each of those hazards. While hazard identification is commonly, if not formally, conducted in most circumstances, specific thr...

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Context 1
... distribution of earthquakes in and around Vancouver Island, British Columbia over the past 5 years is presented in Fig. 1. Located in a seismically active region, much of Vancouver Island's earthquake activity is attributed to build-up and release of stress as the Juan de Fuca plate is subducted beneath the North America plate in what is called the Cascadia Subduction Zone. This seismic zone creates three types of earthquakes: shallow crustal earthquakes ...
Context 2
... less than M7.5 and have a typical duration of less than a minute. Owing to the fact that these earthquakes are relatively shallow events, their potential proximity to built-up urban areas poses a significant threat to Vancouver Island communities. Crustal seismicity on Vancouver Island area has been characterized by numerous, small events ( Fig. 1), which do not exhibit distinct patterns that would indicate the locations of active faulting (Rogers 1998). The most recent damaging crustal earthquake in the region was the M7.3 1946 Courtenay event on eastern Vancouver ...

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