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M6.6 earthquake, Alaska, 1958-10-29

MagnitudeM6.6mw

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Depth30 km

Time (UTC)1958-10-29 07:44

Rank in 195819 / 119among M6+

Rank since 19003953 / 14,458

Energy vs an M6×7approx.

283 km WSW of Adak, Alaska · 51.35, 179.36

M6.5+ within 300 km (largest first)

1965 M8.7M8.7

1906 M8.3M8.3

2014 M7.9M7.9

2003 M7.8M7.8

1965 M7.6M7.6

1965 M7.4M7.4

2003 M7.1M7.1

1916 M7.0M7.0

1981 M7.0M7.0

2003 M6.9M6.9

1965 M6.8M6.8

1966 M6.8M6.8

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.5 1956-10-19	1956-10-19 20:47	25 km	Rat Islands, Aleutian Islands, Alaska
M6.1 1955-07-04	1955-07-04 14:19	48 km	Rat Islands, Aleutian Islands, Alaska
M6.0 1955-07-03	1955-07-03 14:26	31 km	Rat Islands, Aleutian Islands, Alaska
M6.1 1955-06-02	1955-06-02 02:02	35 km	237 km WSW of Adak, Alaska
M6.3 1954-03-28	1954-03-28 20:36	35 km	239 km SE of Attu Station, Alaska
M6.1 1948-12-12	1948-12-12 13:17	20 km	Rat Islands, Aleutian Islands, Alaska
M6.6 1940-03-27	1940-03-27 12:31	50 km	276 km WSW of Adak, Alaska
M6.1 1939-08-21	1939-08-21 15:19	35 km	286 km ESE of Attu Station, Alaska
M6.1 1936-04-23	1936-04-23 23:14	15 km	Rat Islands, Aleutian Islands, Alaska
M6.5 1930-05-20	1930-05-20 11:15	25 km	280 km W of Adak, 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.