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M6.6 earthquake, Canada, 1939-07-18

MagnitudeM6.6mw

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Depth15 km

Time (UTC)1939-07-18 03:26

Rank in 193924 / 80among M6+

Rank since 19003409 / 14,458

Energy vs an M6×8approx.

252 km SW of Port McNeill, Canada · 48.95, -129.52

M6.5+ within 300 km (largest first)

1929 M7.5M7.5

1918 M6.9M6.9

1980 M6.8M6.8

2018 M6.8M6.8

1976 M6.7M6.7

2004 M6.7M6.7

1992 M6.7M6.7

1929 M6.7M6.7

2008 M6.6M6.6

1939 M6.6M6.6

1972 M6.6M6.6

2014 M6.5M6.5

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.3 1935-09-24	1935-09-24 22:12	15 km	181 km SW of Port McNeill, Canada
M6.7 1929-09-17	1929-09-17 19:17	15 km	235 km W of Port McNeill, Canada
M7.5 1929-05-26	1929-05-26 22:40	15 km	262 km W of Port McNeill, Canada
M6.2 1929-03-01	1929-03-01 07:31	15 km	255 km WNW of Port McNeill, Canada
M6.4 1926-11-01	1926-11-01 01:39	15 km	216 km W of Tofino, Canada
M6.1 1926-10-30	1926-10-30 19:42	15 km	216 km SW of Vernon, Canada
M6.0 1926-09-17	1926-09-17 23:14	10 km	119 km SSW of Ucluelet, Canada
M6.1 1924-03-30	1924-03-30 00:09	15 km	246 km WNW of Port McNeill, Canada
M6.4 1920-03-29	1920-03-29 05:07	15 km	46 km NNW of Port McNeill, Canada
M6.9 1918-12-06	1918-12-06 08:41	15 km	32 km SW of Vernon, 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.