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M6.8 earthquake, Alaska, 1933-07-22

MagnitudeM6.8mw

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Depth30 km

Time (UTC)1933-07-22 20:55

Rank in 193313 / 101among M6+

Rank since 19002569 / 14,458

Energy vs an M6×14approx.

46 km SSW of Nikolski, Alaska · 52.59, -169.23

M6.5+ within 300 km (largest first)

1929 M7.8M7.8

1965 M7.8M7.8

1916 M7.4M7.4

2011 M7.3M7.3

1901 M7.1M7.1

1957 M7.1M7.1

1902 M7.0M7.0

1940 M7.0M7.0

1957 M6.9M6.9

1935 M6.9M6.9

1966 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.0 1933-06-28	1933-06-28 23:35	35 km	57 km SSE of Akutan, Alaska
M6.1 1933-05-01	1933-05-01 18:49	35 km	108 km SE of Atka, Alaska
M6.1 1933-04-27	1933-04-27 11:55	15 km	124 km ESE of Nikolski, Alaska
M6.5 1932-08-12	1932-08-12 03:24	25 km	69 km S of Nikolski, Alaska
M6.0 1931-08-14	1931-08-14 16:12	–	75 km SE of Nikolski, Alaska
M6.0 1931-03-29	1931-03-29 17:24	–	229 km SSW of Nikolski, Alaska
M6.5 1930-12-06	1930-12-06 07:03	80 km	173 km ENE of Atka, Alaska
M6.1 1930-12-06	1930-12-06 07:03	35 km	185 km ESE of Atka, Alaska
M6.2 1930-11-12	1930-11-12 19:10	15 km	229 km S of Nikolski, Alaska
M6.1 1930-06-13	1930-06-13 00:53	15 km	236 km SSW of Nikolski, 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.