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M6.6 earthquake, Alaska, 1985-10-09

MagnitudeM6.6mw

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Depth30 km

Time (UTC)1985-10-09 09:33

Rank in 198530 / 160among M6+

Rank since 19003497 / 14,458

Energy vs an M6×8approx.

85 km SE of Sand Point, Alaska · 54.77, -159.61

M6.5+ within 300 km (largest first)

1946 M8.6M8.6

1938 M8.2M8.2

2021 M8.2M8.2

2020 M7.8M7.8

2020 M7.6M7.6

1917 M7.4M7.4

2025 M7.3M7.3

2023 M7.2M7.2

1948 M7.1M7.1

1991 M7.0M7.0

1923 M7.0M7.0

1989 M7.0M7.0

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.0 1985-01-02	1985-01-02 05:32	33 km	98 km ESE of Perryville, Alaska
M6.5 1983-02-14	1983-02-14 03:20	47 km	94 km ESE of Sand Point, Alaska
M6.4 1979-05-20	1979-05-20 08:14	71 km	104 km SSE of Ugashik, Alaska
M6.7 1979-02-13	1979-02-13 05:34	33 km	121 km SE of Chignik, Alaska
M6.0 1979-01-27	1979-01-27 18:57	17 km	75 km ESE of King Cove, Alaska
M6.2 1975-08-02	1975-08-02 10:18	33 km	194 km SSE of King Cove, Alaska
M6.0 1974-04-06	1974-04-06 03:56	40 km	24 km S of Sand Point, Alaska
M6.0 1973-05-29	1973-05-29 06:14	30 km	96 km SSW of False Pass, Alaska
M6.4 1972-03-24	1972-03-24 03:38	70 km	77 km ESE of Chignik, Alaska
M6.5 1967-07-01	1967-07-01 23:10	20 km	183 km SSE of Perryville, 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.