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M8.6 earthquake, Alaska Earthquake, 1946-04-01

MagnitudeM8.6mw

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Depth15 km

Time (UTC)1946-04-01 12:29

Rank in 19461 / 94among M6+

Rank since 190010 / 14,458

Energy vs an M6×7,943approx.

The 1946 Unimak Island, Alaska Earthquake · 53.49, -162.83

M6.5+ within 300 km (largest first)

1946 M8.6M8.6

2020 M7.6M7.6

1917 M7.4M7.4

2025 M7.3M7.3

2023 M7.2M7.2

1948 M7.1M7.1

1957 M7.1M7.1

1991 M7.0M7.0

1901 M7.0M7.0

1940 M7.0M7.0

1987 M6.9M6.9

1993 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.4 1944-07-27	1944-07-27 00:04	65 km	60 km NE of Akutan, Alaska
M6.2 1942-12-09	1942-12-09 22:19	35 km	36 km ESE of Unalaska, Alaska
M6.2 1942-09-09	1942-09-09 01:25	35 km	57 km SE of Unalaska, Alaska
M6.4 1941-11-06	1941-11-06 12:29	25 km	109 km SSE of King Cove, Alaska
M7.0 1940-08-22	1940-08-22 03:27	15 km	203 km SSE of Unalaska, Alaska
M6.0 1940-02-12	1940-02-12 09:17	45 km	58 km SW of Sand Point, Alaska
M6.2 1939-08-20	1939-08-20 07:17	75 km	102 km SSW of False Pass, Alaska
M6.1 1938-07-24	1938-07-24 13:12	35 km	56 km SSW of Unalaska, Alaska
M6.7 1937-04-29	1937-04-29 18:52	35 km	68 km SSE of King Cove, Alaska
M6.2 1933-10-14	1933-10-14 22:19	25 km	Unimak Island region, Alaska

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.