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M6.6 earthquake, Alaska, 1906-12-23

MagnitudeM6.6mw

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Depth35 km

Time (UTC)1906-12-23 07:01

Rank in 190646 / 78among M6+

Rank since 19003883 / 14,458

Energy vs an M6×7approx.

135 km SW of Nikolski, Alaska · 51.99, -170.09

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

1957 M6.9M6.9

1906 M6.9M6.9

1935 M6.9M6.9

1966 M6.9M6.9

2011 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.9 1906-01-27	1906-01-27 09:40	15 km	182 km SSE of Atka, Alaska
M7.0 1902-01-01	1902-01-01 05:20	–	Fox Islands, Aleutian Islands, Alaska
M7.1 1901-12-31	1901-12-31 09:02	–	Fox Islands, Aleutian Islands, 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.