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M6.6 earthquake, Alaska, 1934-07-28

MagnitudeM6.6mw

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Depth20 km

Time (UTC)1934-07-28 21:37

Rank in 193426 / 117among M6+

Rank since 19003254 / 14,458

Energy vs an M6×9approx.

128 km SE of Chignik, Alaska · 55.62, -156.73

M6.5+ within 300 km (largest first)

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

1912 M7.1M7.1

1923 M7.0M7.0

1989 M7.0M7.0

1999 M7.0M7.0

1993 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.3 1932-10-30	1932-10-30 20:47	35 km	68 km SE of Sand Point, Alaska
M6.6 1932-10-16	1932-10-16 12:08	25 km	72 km SE of Sand Point, Alaska
M6.2 1927-08-06	1927-08-06 00:14	35 km	74 km SE of Perryville, Alaska
M6.2 1927-07-28	1927-07-28 16:17	55 km	64 km SSE of Perryville, Alaska
M6.2 1927-03-25	1927-03-25 12:55	35 km	143 km SE of Perryville, Alaska
M7.0 1923-05-04	1923-05-04 16:26	25 km	113 km ESE of Chignik, Alaska
M6.8 1922-07-02	1922-07-02 13:36	35 km	73 km SW of Sand Point, Alaska
M6.0 1918-06-27	1918-06-27 21:29	35 km	71 km SSE of Sand Point, Alaska
M6.4 1917-12-28	1917-12-28 21:14	15 km	103 km SSE of Akhiok, Alaska
M6.2 1917-12-21	1917-12-21 20:52	15 km	173 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.