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Being somewhat
contrarian, our
prediction software
assigned the relatively
highest chances of
one or more major
events to the purple
triangles, presumably
on grounds there was
unrelieved pressure
there. There were
roughly order of
magnitude lower
probabilities assigned
to the southernmost
yellow cluster, the
white cluster and the
southern red cluster.
Somewhat still lower
chances for the
central orange and
northern blue
clusters.
Vancouver Island is located in the southwestern corner of the province of British Columbia. It is
separated from the mainland by the Johnstone Strait and Queen Charlotte Strait northeast; the
Strait of Georgia southeast; and the Strait of Juan de Fuca southwest. A major marine earthquake in
or near any of these areas would be very damaging. The poorly understood Vancouver Island event of
June 23, 1946 was a Richter 7.3 with an epicenter near the central eastern shore. The more powerful
(Richter 8.1) but less damaging Queen Charlotte Islands earthquake of August 22, 1949 (gray dots
near the top of the second highest triangle) remains Canada's strongest measured event to-date.