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M6.5 earthquake, Canada, 1956-12-21

MagnitudeM6.5mw

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Depth15 km

Time (UTC)1956-12-21 08:59

Rank in 195621 / 109among M6+

Rank since 19004222 / 14,458

Energy vs an M6×6approx.

269 km WNW of Port McNeill, Canada · 51.29, -130.76

M6.5+ within 300 km (largest first)

2012 M7.8M7.8

1929 M7.5M7.5

1970 M7.3M7.3

1980 M6.8M6.8

2018 M6.8M6.8

1976 M6.7M6.7

2004 M6.7M6.7

1992 M6.7M6.7

1938 M6.7M6.7

1929 M6.7M6.7

1939 M6.6M6.6

2008 M6.6M6.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.4 1956-06-28	1956-06-28 22:58	15 km	236 km SW of Port McNeill, Canada
M6.5 1956-02-19	1956-02-19 02:18	15 km	Haida Gwaii Region, Canada
M6.4 1953-12-04	1953-12-04 14:54	15 km	207 km SW of Port McNeill, Canada
M6.0 1951-09-27	1951-09-27 19:24	15 km	190 km SW of Port McNeill, Canada
M6.3 1949-08-23	1949-08-23 20:24	10 km	241 km SSW of Prince Rupert, Canada
M6.4 1948-12-30	1948-12-30 23:49	15 km	Haida Gwaii Region, Canada
M6.0 1948-02-28	1948-02-28 01:58	15 km	191 km WSW of Prince Rupert, Canada
M6.3 1946-07-18	1946-07-18 07:16	10 km	294 km SW of Port McNeill, Canada
M6.3 1946-07-18	1946-07-18 06:07	10 km	238 km SW of Port McNeill, Canada
M6.3 1945-10-29	1945-10-29 10:54	15 km	298 km S of Prince Rupert, Canada

Energy ratio uses the rule that one magnitude unit is about 32 times the energy. Magnitudes and locations are USGS values and can differ from national agencies. Older records are less complete and less precise.