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Home / Earthquakes / Alaska

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 4.6 mbSeptember 3, 2015
176 km S of Nikolski, Alaska · depth 24 km
M 4.5 mbSeptember 1, 2015
Fox Islands, Aleutian Islands, Alaska · depth 50 km
M 4.5 mbAugust 19, 2015
168 km S of False Pass, Alaska · depth 10 km
M 4.5 mbAugust 19, 2015
163 km S of False Pass, Alaska · depth 10 km
M 4.7 mbAugust 17, 2015
81 km S of Nikolski, Alaska · depth 22 km
M 5.1 mbAugust 9, 2015
76 km S of Nikolski, Alaska · depth 22 km
M 5.0 mbAugust 8, 2015
75 km SW of Nikolski, Alaska · depth 41 km
M 4.7 mbAugust 1, 2015
Fox Islands, Aleutian Islands, Alaska · depth 17 km
M 5.1 mbJuly 31, 2015
67 km WSW of Nikolski, Alaska · depth 37 km
M 4.8 mbJuly 31, 2015
70 km SW of Nikolski, Alaska · depth 52 km
M 5.0 mbJuly 31, 2015
121 km SSW of Nikolski, Alaska · depth 17 km
M 5.2 mwbJuly 29, 2015
104 km SSW of Nikolski, Alaska · depth 29 km
M 4.9 mbJuly 29, 2015
67 km SSW of Nikolski, Alaska · depth 42 km
M 6.4 mwJuly 29, 2015
52 km ENE of Pedro Bay, Alaska · depth 119 km
M 5.3 mwbJuly 28, 2015
91 km SSW of Nikolski, Alaska · depth 20 km
M 4.6 mbJuly 27, 2015
84 km SSW of Nikolski, Alaska · depth 39 km
M 4.6 mbJuly 27, 2015
88 km SSW of Nikolski, Alaska · depth 12 km
M 4.7 mbJuly 27, 2015
91 km SSW of Nikolski, Alaska · depth 20 km
M 5.0 mbJuly 27, 2015
82 km SSW of Nikolski, Alaska · depth 40 km
M 5.7 mbJuly 27, 2015
82 km SSW of Nikolski, Alaska · depth 40 km
M 5.6 mbJuly 27, 2015
77 km SW of Nikolski, Alaska · depth 35 km
M 5.5 mbJuly 27, 2015
66 km SSW of Nikolski, Alaska · depth 35 km
M 5.9 mwcJuly 27, 2015
82 km SSW of Nikolski, Alaska · depth 35 km
M 4.7 mbJuly 27, 2015
73 km SSW of Nikolski, Alaska · depth 35 km
M 4.9 mbJuly 27, 2015
95 km SSW of Nikolski, Alaska · depth 14 km
M 5.0 mbJuly 27, 2015
Fox Islands, Aleutian Islands, Alaska · depth 24 km
M 5.1 mbJuly 27, 2015
78 km SSW of Nikolski, Alaska · depth 33 km
M 5.4 mbJuly 27, 2015
87 km SSW of Nikolski, Alaska · depth 22 km
M 4.7 mbJuly 27, 2015
89 km SSW of Nikolski, Alaska · depth 30 km
M 4.7 mbJuly 27, 2015
71 km SSW of Nikolski, Alaska · depth 36 km
M 4.6 mbJuly 27, 2015
60 km SSW of Nikolski, Alaska · depth 46 km
M 4.7 mbJuly 27, 2015
97 km SSW of Nikolski, Alaska · depth 6 km
M 5.7 mbJuly 27, 2015
89 km SSW of Nikolski, Alaska · depth 28 km
M 5.2 mbJuly 27, 2015
97 km SSW of Nikolski, Alaska · depth 14 km
M 5.9 mbJuly 27, 2015
51 km WSW of Nikolski, Alaska · depth 32 km
M 6.9 mwwJuly 27, 2015
Fox Islands, Aleutian Islands, Alaska · depth 29 km
M 4.5 mbJuly 27, 2015
86 km SSW of Nikolski, Alaska · depth 30 km
M 5.1 mwJuly 25, 2015
34 km W of Skwentna, Alaska · depth 126 km
M 4.8 mlJuly 6, 2015
35 km ENE of Skwentna, Alaska · depth 71 km
M 4.5 mlJune 29, 2015
13 km SW of Larsen Bay, Alaska · depth 63 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.