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Alaska Earthquake History
Since October 9, 1900, the USGS has recorded 5,198 earthquakes of magnitude 4.5 or greater in Alaska, 420 of them magnitude 6 or above. The strongest was M 9.2.
By decade
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Strongest in Alaska
M 9.2 · The 1964 Prince William Sound, Alaska EarthquakeMarch 28, 1964M 8.6 · The 1946 Unimak Island, Alaska EarthquakeApril 1, 1946M 8.2 · 1938 Semidi Islands, Alaska EarthquakeNovember 10, 1938M 8.2 · 2021 Chignik, Alaska EarthquakeJuly 29, 2021M 7.9 · 261 km SE of Chiniak, AlaskaJanuary 23, 2018M 7.9 · 2002 Denali Fault, Alaska EarthquakeNovember 3, 2002M 7.9 · 200 km WSW of Yakutat, AlaskaNovember 30, 1987M 7.9 · Kodiak Island region, AlaskaOctober 9, 1900M 7.8 · 81 km E of Nikolski, AlaskaJuly 2, 1965M 7.8 · 22 km W of Elfin Cove, AlaskaJuly 10, 1958
All recorded earthquakes
M 5.2 mwAugust 29, 1987
11 km S of Nikolski, Alaska · depth 33 km
M 4.7 mbAugust 27, 1987
72 km SW of Unalaska, Alaska · depth 33 km
M 6.0 mwAugust 14, 1987
55 km NNW of Nikolski, Alaska · depth 118 km
M 4.6 mbAugust 13, 1987
73 km SSE of Kokhanok, Alaska · depth 121 km
M 4.6 mbAugust 8, 1987
44 km W of Dutch Harbor, Alaska · depth 33 km
M 4.6 mbAugust 8, 1987
54 km SSE of Nikolski, Alaska · depth 33 km
M 4.8 mbJuly 27, 1987
124 km S of False Pass, Alaska · depth 33 km
M 5.6 mwJuly 25, 1987
30 km E of Port Alsworth, Alaska · depth 167 km
M 4.6 mbJuly 24, 1987
74 km SSE of Akhiok, Alaska · depth 33 km
M 5.7 mwJuly 24, 1987
85 km SSE of Akhiok, Alaska · depth 33 km
M 4.5 mbJuly 23, 1987
144 km SW of Nikolski, Alaska · depth 33 km
M 4.6 mbJuly 22, 1987
198 km SSE of Akutan, Alaska · depth 33 km
M 4.8 mbJuly 20, 1987
94 km E of Akutan, Alaska · depth 33 km
M 4.7 mbJuly 6, 1987
39 km W of Dutch Harbor, Alaska · depth 33 km
M 4.6 mbJuly 1, 1987
108 km SE of False Pass, Alaska · depth 33 km
M 4.6 mbJune 29, 1987
Unimak Island region, Alaska · depth 33 km
M 4.7 mbJune 26, 1987
108 km SSW of False Pass, Alaska · depth 33 km
M 4.5 mbJune 23, 1987
92 km SSE of Sand Point, Alaska · depth 33 km
M 4.9 mbJune 21, 1987
84 km SE of False Pass, Alaska · depth 33 km
M 4.8 mbJune 21, 1987
78 km SSE of False Pass, Alaska · depth 33 km
M 5.5 mbJune 21, 1987
82 km SE of False Pass, Alaska · depth 33 km
M 6.5 mwJune 21, 1987
88 km SE of False Pass, Alaska · depth 34 km
M 4.5 mbJune 13, 1987
35 km WSW of Unalaska, Alaska · depth 33 km
M 4.6 mbJune 10, 1987
25 km WSW of Nanwalek, Alaska · depth 61 km
M 4.6 mbMay 29, 1987
41 km WSW of Unalaska, Alaska · depth 33 km
M 4.7 mbMay 26, 1987
31 km W of Dutch Harbor, Alaska · depth 33 km
M 5.0 mbMay 25, 1987
93 km SSE of Old Harbor, Alaska · depth 33 km
M 4.7 mbMay 22, 1987
217 km SSE of Akutan, Alaska · depth 33 km
M 4.5 mbMay 20, 1987
68 km SSE of Old Harbor, Alaska · depth 33 km
M 4.8 mbMay 20, 1987
77 km SSE of Old Harbor, Alaska · depth 33 km
M 4.5 mbMay 20, 1987
102 km SSE of Old Harbor, Alaska · depth 33 km
M 4.8 mbMay 20, 1987
75 km SSE of Old Harbor, Alaska · depth 33 km
M 5.3 mwMay 20, 1987
78 km SSE of Old Harbor, Alaska · depth 33 km
M 4.8 mbMay 15, 1987
90 km SE of Akhiok, Alaska · depth 33 km
M 5.3 mwMay 2, 1987
64 km SSE of Sand Point, Alaska · depth 33 km
M 5.3 mwApril 18, 1987
20 km SSW of Susitna, Alaska · depth 68 km
M 4.6 mbApril 14, 1987
36 km W of Nikolski, Alaska · depth 33 km
M 4.5 mbApril 12, 1987
63 km SW of Unalaska, Alaska · depth 33 km
M 5.1 mbApril 11, 1987
68 km SW of Unalaska, Alaska · depth 33 km
M 5.7 mwApril 9, 1987
38 km ESE of Nikolski, Alaska · depth 33 km
Source: U.S. Geological Survey, Earthquake Hazards Program. Older and smaller earthquakes are under-counted relative to recent decades as instrumentation improved. A record of past shaking is not a forecast. See About the Data.