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M6.5 earthquake, Alaska, 1986-09-12

MagnitudeM6.5mw

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Depth31 km

Time (UTC)1986-09-12 23:57

Rank in 198635 / 138among M6+

Rank since 19004366 / 14,458

Energy vs an M6×6approx.

95 km SSE of Akhiok, Alaska · 56.20, -153.41

M6.5+ within 300 km (largest first)

2021 M8.2M8.2

2018 M7.9M7.9

1900 M7.9M7.9

1912 M7.1M7.1

1923 M7.0M7.0

1989 M7.0M7.0

1912 M7.0M7.0

1999 M7.0M7.0

1938 M6.9M6.9

1951 M6.9M6.9

1964 M6.9M6.9

2021 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.8 1986-06-19	1986-06-19 09:09	17 km	100 km SSE of Old Harbor, Alaska
M6.0 1985-01-02	1985-01-02 05:32	33 km	98 km ESE of Perryville, 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
M6.6 1978-04-12	1978-04-12 03:42	14 km	94 km SSE of Old Harbor, Alaska
M6.0 1974-08-01	1974-08-01 07:59	33 km	89 km SE of Old Harbor, Alaska
M6.3 1974-08-01	1974-08-01 05:55	33 km	94 km SE of Old Harbor, Alaska
M6.1 1974-08-01	1974-08-01 05:07	10 km	97 km SE of Old Harbor, Alaska
M6.4 1972-03-24	1972-03-24 03:38	70 km	77 km ESE of Chignik, Alaska
M6.1 1966-04-16	1966-04-16 01:27	35 km	36 km ESE 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.