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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 4.9 mbFebruary 14, 1973
202 km SSE of Sand Point, Alaska · depth 32 km
M 4.5 mbFebruary 7, 1973
186 km SE of Cordova, Alaska · depth 33 km
M 4.6 mbJanuary 21, 1973
60 km NE of Ouzinkie, Alaska · depth 29 km
M 4.9 mbJanuary 19, 1973
18 km NE of Akhiok, Alaska · depth 32 km
M 5.3 mbJanuary 16, 1973
15 km E of Akutan, Alaska · depth 81 km
M 4.7 mbJanuary 11, 1973
121 km SSW of Nikolski, Alaska · depth 56 km
M 5.4 mbJanuary 11, 1973
106 km SSW of Nikolski, Alaska · depth 30 km
M 5.1 mbJanuary 9, 1973
28 km SSW of Cordova, Alaska · depth 18 km
M 4.9 mbJanuary 6, 1973
181 km SSE of False Pass, Alaska · depth 33 km
M 5.4 mwDecember 19, 1972
117 km SSW of Nikolski, Alaska · depth 26 km
M 5.5 mwOctober 21, 1972
59 km SE of Denali National Park, Alaska · depth 130 km
M 5.9 mwOctober 13, 1972
228 km S of False Pass, Alaska · depth 16 km
M 5.2 mwSeptember 29, 1972
104 km NW of Yakutat, Alaska · depth 15 km
M 5.7 mwAugust 23, 1972
40 km WNW of Aleneva, Alaska · depth 69 km
M 5.2 mwAugust 15, 1972
56 km W of Port Alexander, Alaska · depth 13 km
M 5.1 mwAugust 13, 1972
130 km SSE of Cordova, Alaska · depth 14 km
M 5.3 mwAugust 12, 1972
82 km SE of Akutan, Alaska · depth 27 km
M 6.1 mwAugust 4, 1972
53 km WSW of Port Alexander, Alaska · depth 20 km
M 7.6 mwJuly 30, 1972
55 km SW of Sitka, Alaska · depth 20 km
M 5.3 mwJune 23, 1972
56 km SSE of Akutan, Alaska · depth 41 km
M 5.1 mwJune 18, 1972
92 km WNW of Skwentna, Alaska · depth 15 km
M 6.1 mwJune 12, 1972
63 km SSW of Unalaska, Alaska · depth 36 km
M 5.4 mwJune 10, 1972
140 km SSE of Alcan Border, Alaska · depth 10 km
M 5.5 mwMay 20, 1972
233 km S of Sand Point, Alaska · depth 16 km
M 5.9 mwApril 21, 1972
27 km WNW of Dutch Harbor, Alaska · depth 107 km
M 6.4 mwMarch 24, 1972
77 km ESE of Chignik, Alaska · depth 70 km
M 5.5 mwFebruary 24, 1972
51 km SSE of Chignik, Alaska · depth 59 km
M 5.8 mwFebruary 21, 1972
46 km S of Chignik, Alaska · depth 55 km
M 5.8 mwOctober 19, 1971
140 km ESE of Nikolski, Alaska · depth 33 km
M 5.5 mwSeptember 23, 1971
81 km SE of Akutan, Alaska · depth 45 km
M 5.1 mwSeptember 20, 1971
91 km SSE of Old Harbor, Alaska · depth 25 km
M 5.4 mwSeptember 20, 1971
101 km SE of Akhiok, Alaska · depth 23 km
M 5.9 mwSeptember 4, 1971
14 km NNE of False Pass, Alaska · depth 115 km
M 5.5 mwAugust 21, 1971
97 km S of King Cove, Alaska · depth 42 km
M 5.3 mwAugust 5, 1971
133 km NW of False Pass, Alaska · depth 13 km
M 5.7 msJuly 21, 1971
158 km SW of Nikolski, Alaska · depth 36 km
M 5.4 mwJune 27, 1971
161 km SW of Nikolski, Alaska · depth 24 km
M 5.5 mwJune 10, 1971
146 km SW of Nikolski, Alaska · depth 25 km
M 5.4 mwJune 9, 1971
115 km SSE of Ugashik, Alaska · depth 72 km
M 5.3 mwJune 4, 1971
223 km ESE of Atka, Alaska · depth 25 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.