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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 5.5 mwSeptember 20, 1984
28 km SSW of Cordova, Alaska · depth 18 km
M 4.6 mbSeptember 5, 1984
129 km S of Cordova, Alaska · depth 33 km
M 4.9 mbSeptember 1, 1984
152 km S of False Pass, Alaska · depth 33 km
M 4.8 mbSeptember 1, 1984
146 km SW of Nikolski, Alaska · depth 33 km
M 4.6 mbSeptember 1, 1984
41 km E of Nikolski, Alaska · depth 61 km
M 5.9 mwAugust 30, 1984
132 km SSW of Hydaburg, Alaska · depth 10 km
M 4.5 mbAugust 27, 1984
39 km E of Pedro Bay, Alaska · depth 127 km
M 4.6 mbAugust 17, 1984
212 km SE of Perryville, Alaska · depth 33 km
M 4.5 mlAugust 16, 1984
south of Alaska · depth 33 km
M 5.8 mwAugust 14, 1984
14 km NNE of Fishhook, Alaska · depth 20 km
M 5.0 msJuly 30, 1984
51 km SSE of Akutan, Alaska · depth 33 km
M 4.7 mbJuly 29, 1984
71 km SE of Nikolski, Alaska · depth 33 km
M 5.3 mbJuly 25, 1984
49 km SSE of Sand Point, Alaska · depth 53 km
M 5.1 mbJuly 16, 1984
73 km SE of Nikolski, Alaska · depth 33 km
M 4.9 mbJuly 2, 1984
Kodiak Island region, Alaska · depth 33 km
M 4.9 mbJune 22, 1984
133 km SSE of False Pass, Alaska · depth 33 km
M 4.6 mbJune 17, 1984
61 km SSE of Nikolski, Alaska · depth 33 km
M 4.7 mbJune 14, 1984
106 km SSW of Nikolski, Alaska · depth 33 km
M 5.7 mwJune 12, 1984
65 km SE of Akutan, Alaska · depth 43 km
M 5.1 mwJune 5, 1984
68 km S of Ugashik, Alaska · depth 94 km
M 5.5 mwJune 4, 1984
171 km WSW of Nikolski, Alaska · depth 33 km
M 4.5 mbMay 29, 1984
211 km ESE of Nikolski, Alaska · depth 33 km
M 4.8 mbMay 28, 1984
54 km ESE of Pope-Vannoy Landing, Alaska · depth 101 km
M 4.5 mbMay 23, 1984
171 km SSW of Akhiok, Alaska · depth 33 km
M 4.6 mbMay 21, 1984
56 km SSE of King Salmon, Alaska · depth 161 km
M 4.8 mbMay 4, 1984
72 km W of Nanwalek, Alaska · depth 88 km
M 4.9 mbMay 2, 1984
off the coast of Southeastern Alaska · depth 10 km
M 5.4 mbApril 28, 1984
127 km SSW of Nikolski, Alaska · depth 33 km
M 4.9 mbApril 27, 1984
129 km ESE of Nikolski, Alaska · depth 33 km
M 4.5 mbApril 20, 1984
47 km SW of Skwentna, Alaska · depth 119 km
M 4.7 mlApril 19, 1984
59 km SSE of Bettles, Alaska · depth 33 km
M 5.1 mbApril 18, 1984
45 km WNW of Nikiski, Alaska · depth 95 km
M 5.0 mbApril 18, 1984
116 km SSW of Nikolski, Alaska · depth 33 km
M 5.0 mbApril 12, 1984
132 km NW of Yakutat, Alaska · depth 15 km
M 5.3 msMarch 27, 1984
118 km SSW of Nikolski, Alaska · depth 35 km
M 4.9 mbMarch 24, 1984
72 km SSE of Nikolski, Alaska · depth 33 km
M 5.1 mbMarch 24, 1984
68 km SSE of Nikolski, Alaska · depth 33 km
M 5.4 mwMarch 24, 1984
70 km SSE of Nikolski, Alaska · depth 29 km
M 4.7 mbMarch 24, 1984
Southern Alaska · depth 66 km
M 5.6 mwMarch 23, 1984
62 km SE of Kokhanok, Alaska · depth 119 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.