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M6.6 earthquake, Alaska, 1990-05-01

MagnitudeM6.6mw

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Depth252 km

Time (UTC)1990-05-01 16:12

Rank in 199032 / 153among M6+

Rank since 19003528 / 14,458

Energy vs an M6×8approx.

19 km SSE of King Salmon, Alaska · 58.52, -156.54

M6.5+ within 300 km (largest first)

2016 M7.1M7.1

1912 M7.1M7.1

1923 M7.0M7.0

1912 M7.0M7.0

1999 M7.0M7.0

2021 M6.9M6.9

2001 M6.9M6.9

2015 M6.8M6.8

1912 M6.8M6.8

1965 M6.8M6.8

1912 M6.8M6.8

1912 M6.6M6.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.4 1988-02-07	1988-02-07 08:46	134 km	75 km WNW of Ninilchik, Alaska
M6.4 1979-05-20	1979-05-20 08:14	71 km	104 km SSE of Ugashik, Alaska
M6.4 1972-03-24	1972-03-24 03:38	70 km	77 km ESE of Chignik, Alaska
M6.0 1970-04-18	1970-04-18 08:50	98 km	53 km W of Anchor Point, Alaska
M6.2 1968-12-17	1968-12-17 12:02	110 km	70 km E of Port Alsworth, Alaska
M6.1 1966-04-16	1966-04-16 01:27	35 km	36 km ESE of Akhiok, Alaska
M6.2 1965-12-22	1965-12-22 19:41	51 km	37 km NNW of Aleneva, Alaska
M6.8 1965-09-04	1965-09-04 14:32	29 km	17 km N of Ouzinkie, Alaska
M6.2 1964-04-15	1964-04-15 15:30	29 km	54 km S of Akhiok, Alaska
M6.5 1964-04-04	1964-04-04 17:59	23 km	70 km SSW of Akhiok, 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.