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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 4.7 mwrOctober 11, 2022
83 km SSW of Unalaska, Alaska · depth 44 km
M 4.6 mwrOctober 10, 2022
south of Alaska · depth 29 km
M 4.8 mwrOctober 10, 2022
135 km SW of Nikolski, Alaska · depth 45 km
M 4.6 mbOctober 9, 2022
89 km W of Karluk, Alaska · depth 9 km
M 4.8 mwwOctober 6, 2022
4 km ENE of Glacier View, Alaska · depth 34 km
M 4.8 mwwOctober 5, 2022
55 km NNE of Petersville, Alaska · depth 99 km
M 4.6 mwrOctober 5, 2022
64 km WNW of Anchor Point, Alaska · depth 118 km
M 5.0 mwwSeptember 29, 2022
111 km NW of Yakutat, Alaska · depth 13 km
M 4.8 mbSeptember 24, 2022
Southern Alaska · depth 41 km
M 5.1 mwwSeptember 20, 2022
122 km E of Chignik, Alaska · depth 27 km
M 4.5 mwrSeptember 19, 2022
15 km NNW of Four Mile Road, Alaska · depth 19 km
M 4.5 mwrSeptember 9, 2022
105 km SSE of Old Harbor, Alaska · depth 25 km
M 4.5 mbAugust 30, 2022
south of Alaska · depth 19 km
M 4.5 mbAugust 30, 2022
south of Alaska · depth 5 km
M 4.5 mbAugust 22, 2022
58 km WNW of Cold Bay, Alaska · depth 172 km
M 4.8 mwwAugust 17, 2022
153 km SW of Akhiok, Alaska · depth 35 km
M 4.6 mbAugust 9, 2022
185 km WSW of Nikolski, Alaska · depth 31 km
M 4.6 mbAugust 7, 2022
69 km SE of Unalaska, Alaska · depth 43 km
M 5.1 mbAugust 1, 2022
97 km SSE of Nikolski, Alaska · depth 10 km
M 5.3 mwwAugust 1, 2022
67 km SSE of Akutan, Alaska · depth 40 km
M 4.8 mwwJuly 12, 2022
14 km WNW of Point Possession, Alaska · depth 69 km
M 5.2 mbJuly 4, 2022
22 km E of Saint George, Alaska · depth 10 km
M 5.4 mwwJuly 4, 2022
28 km E of Saint George, Alaska · depth 12 km
M 4.5 mwrJune 9, 2022
110 km SE of Sand Point, Alaska · depth 29 km
M 5.2 mwwJune 2, 2022
102 km SW of Nikolski, Alaska · depth 39 km
M 4.9 mwwJune 2, 2022
133 km SE of Chignik, Alaska · depth 39 km
M 4.5 mbMay 9, 2022
147 km SE of Perryville, Alaska · depth 28 km
M 5.4 mwwApril 28, 2022
119 km E of Chignik, Alaska · depth 52 km
M 5.4 mwwApril 25, 2022
260 km SE of Perryville, Alaska · depth 12 km
M 4.5 mbApril 23, 2022
117 km S of Unalaska, Alaska · depth 17 km
M 5.2 mwwApril 22, 2022
37 km NW of Nelson Lagoon, Alaska · depth 212 km
M 4.5 mwrApril 13, 2022
79 km SSE of Sand Point, Alaska · depth 31 km
M 4.6 mwrApril 10, 2022
112 km SSE of Ugashik, Alaska · depth 50 km
M 4.8 mlMarch 23, 2022
67 km E of Port Alsworth, Alaska · depth 148 km
M 4.8 mwrMarch 12, 2022
44 km WNW of Nikiski, Alaska · depth 95 km
M 4.6 mbFebruary 28, 2022
41 km W of Happy Valley, Alaska · depth 100 km
M 4.5 mbFebruary 28, 2022
108 km SSW of Unalaska, Alaska · depth 35 km
M 5.1 mbFebruary 22, 2022
70 km S of Unalaska, Alaska · depth 43 km
M 5.1 mwwFebruary 21, 2022
82 km SSW of Unalaska, Alaska · depth 30 km
M 5.3 mlFebruary 20, 2022
110 km SE of Perryville, Alaska · depth 17 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.