The following map and list show the date, magnitude and location of the 10 largest earthquakes ever located in Canada or its territorial waters. Note that many large earthquakes occuring in neighbouring Alaska or Washington state have also affected residents in western Canada. Magnitudes for earthquakes prior to the 20th century are less precise as they have been estimated from non-instrumental data.

Date	Lat N	Lon W	Magnitude	Location
1700/01/26	48.5	125	9.0	Cascadia subduction zone, British Columbia.
1949/08/22	53.62	133.27	8.1	Offshore Queen Charlotte Islands, British Columbia.
1970/06/24	51.77	130.76	7.4	South of Queen Charlotte Islands, British Columbia.
1933/11/20	73.00	70.75	7.3	Baffin Bay, Northwest Territories.
1946/06/23	49.76	125.34	7.3	Vancouver Island, British Columbia.
1929/11/18	44.50	56.30	7.2	Grand Banks south of Newfoundland.
1929/05/26	51.51	130.74	7.0	South of Queen Charlotte Islands, British Columbia.
1663/02/05	47.6	70.1	7.0	Charlevoix, Quebec.
1985/12/23	62.19	124.24	6.9	Nahanni region, Northwest Territories.
1918/12/06	49.62	125.92	6.9	Vancouver Island, British Columbia.