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M6.5 earthquake, Alaska, 1964-03-28

MagnitudeM6.5mw

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Depth25 km

Time (UTC)1964-03-28 14:46

Rank in 196434 / 144among M6+

Rank since 19004018 / 14,458

Energy vs an M6×6approx.

76 km S of Akhiok, Alaska · 56.26, -154.21

M6.5+ within 300 km (largest first)

1938 M8.2M8.2

2021 M8.2M8.2

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
M6.5 1964-03-28	1964-03-28 12:20	21 km	67 km S of Akhiok, Alaska
M6.2 1964-03-28	1964-03-28 10:35	25 km	53 km ESE of Old Harbor, Alaska
M6.5 1964-03-28	1964-03-28 06:44	25 km	78 km ENE of Ouzinkie, Alaska
M6.9 1964-02-06	1964-02-06 13:07	26 km	171 km SW of Akhiok, Alaska
M6.4 1963-01-01	1963-01-01 23:39	75 km	61 km ENE of Chignik, Alaska
M6.1 1961-01-31	1961-01-31 00:48	29 km	119 km S of Akhiok, Alaska
M6.0 1960-09-01	1960-09-01 15:37	22 km	84 km SSE of Akhiok, Alaska
M6.7 1957-04-10	1957-04-10 11:30	15 km	120 km S of Akhiok, Alaska
M6.1 1955-11-15	1955-11-15 10:06	28 km	210 km SE of Chignik, Alaska
M6.3 1955-07-27	1955-07-27 18:19	25 km	105 km SSE 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.