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M7.9 earthquake, Alaska, 2018-01-23

MagnitudeM7.9mww

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Depth14 km

Time (UTC)2018-01-23 09:31

Rank in 20182 / 134among M6+

Rank since 1900144 / 14,458

Energy vs an M6×708approx.

261 km SE of Chiniak, Alaska · 56.00, -149.17

M5.5+ within 100 km in the next 30 days

Event	Time (UTC)	Depth	Place
M5.5 2018-01-23	2018-01-23 11:47	33 km	228 km SE of Chiniak, Alaska
M5.5 2018-01-24	2018-01-24 00:04	10 km	256 km ESE of Chiniak, Alaska

M6.5+ within 300 km (largest first)

2018 M7.9M7.9

1900 M7.9M7.9

1906 M7.0M7.0

2001 M6.9M6.9

1986 M6.8M6.8

1957 M6.7M6.7

1917 M6.6M6.6

1968 M6.6M6.6

1978 M6.6M6.6

1964 M6.5M6.5

1986 M6.5M6.5

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.0 2008-05-25	2008-05-25 19:18	20 km	122 km SSE of Akhiok, Alaska
M6.9 2001-01-10	2001-01-10 16:02	36 km	47 km S of Old Harbor, Alaska
M6.2 1999-05-07	1999-05-07 14:13	10 km	129 km SSE of Old Harbor, Alaska
M6.0 1999-01-16	1999-01-16 10:44	21 km	Gulf of Alaska
M6.1 1990-05-29	1990-05-29 18:30	10 km	155 km SSE of Akhiok, Alaska
M6.0 1989-02-22	1989-02-22 10:25	33 km	94 km SSE of Akhiok, Alaska
M6.5 1986-09-12	1986-09-12 23:57	31 km	95 km SSE of Akhiok, Alaska
M6.8 1986-06-19	1986-06-19 09:09	17 km	100 km SSE of Old Harbor, 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

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.