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M6.6 earthquake, Alaska, 1946-04-01

MagnitudeM6.6mw

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Depth25 km

Time (UTC)1946-04-01 18:57

Rank in 194625 / 94among M6+

Rank since 19003868 / 14,458

Energy vs an M6×7approx.

146 km ESE of Akutan, Alaska · 53.54, -163.78

M6.5+ within 300 km (largest first)

1946 M8.6M8.6

1965 M7.8M7.8

2020 M7.6M7.6

2025 M7.3M7.3

2023 M7.2M7.2

1948 M7.1M7.1

1957 M7.1M7.1

1902 M7.0M7.0

1991 M7.0M7.0

1940 M7.0M7.0

1980 M6.9M6.9

1987 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1946-04-01	1946-04-01 16:59	25 km	136 km SE of Akutan, Alaska
M8.6 1946-04-01	1946-04-01 12:29	15 km	The 1946 Unimak Island, Alaska Earthquake
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
M6.3 1942-09-25	1942-09-25 08:14	15 km	110 km SE of Nikolski, Alaska
M6.2 1942-09-09	1942-09-09 01:25	35 km	57 km SE of Unalaska, Alaska
M6.2 1942-09-04	1942-09-04 17:46	44 km	56 km ENE of Nikolski, Alaska
M6.0 1942-09-02	1942-09-02 03:17	35 km	Fox Islands, Aleutian Islands, 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

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.