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The M8.1 Haida Gwaii (formerly Queen Charlotte Islands) Earthquake of August 22, 1949
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Local Date and Time: August 21, 1949 at 08:01:12 pm Pacific time
UT Date and Time: 1949-08-22 04:01:12 UT
Magnitude: M
W 8.1; M
S 8.1
Maximum Intensity: (
Modified Mercalli) VII-VIII
Latitude: 53.62° N
Longitude: 133.27° W
Canada's largest earthquake (magnitude 8.1) since 1700,
occurred on August 22, 1949 off the coast of BC. It occurred on the Queen Charlotte Fault (Canada's
equivalent of the San Andreas Fault) - the boundary between the Pacific and
North American plates that runs underwater along the west coast of the Haida Gwaii (formerly Queen Charlotte Islands) off the west coast of British Columbia. The shaking was
so severe on the Haida Gwaii that cows were knocked off their
feet, and a geologist with the Geological Survey of Canada working on the
north end of Graham Island could not stand up. Chimneys toppled, and an oil
tank at Cumshewa Inlet collapsed. In Terrace, on the adjacent mainland, cars
were bounced around, and standing on the street was described as "like being
on the heaving deck of a ship at sea". In Prince Rupert, windows were shattered and buildings swayed.
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