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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 5.0 mbSeptember 21, 1973
Kodiak Island region, Alaska · depth 45 km
M 5.0 mbSeptember 19, 1973
79 km S of Akhiok, Alaska · depth 33 km
M 4.7 mbSeptember 10, 1973
25 km SSW of Larsen Bay, Alaska · depth 28 km
M 5.5 mbSeptember 6, 1973
21 km NNW of Tatitlek, Alaska · depth 29 km
M 5.1 mbAugust 31, 1973
47 km WNW of Tatitlek, Alaska · depth 49 km
M 5.9 mbAugust 22, 1973
14 km NNE of Akhiok, Alaska · depth 38 km
M 4.9 mbAugust 21, 1973
12 km NNE of Dutch Harbor, Alaska · depth 96 km
M 4.7 mbAugust 18, 1973
47 km E of Chenega, Alaska · depth 19 km
M 4.8 mbAugust 10, 1973
89 km SE of False Pass, Alaska · depth 53 km
M 5.0 mbAugust 3, 1973
68 km WNW of Nikolski, Alaska · depth 124 km
M 4.7 mbJuly 28, 1973
93 km WSW of Elfin Cove, Alaska · depth 10 km
M 4.7 mbJuly 23, 1973
240 km SE of Atka, Alaska · depth 33 km
M 4.7 mbJuly 19, 1973
20 km W of Clam Gulch, Alaska · depth 95 km
M 5.0 mbJuly 14, 1973
100 km WSW of Elfin Cove, Alaska · depth 33 km
M 4.6 mbJuly 11, 1973
105 km WSW of Elfin Cove, Alaska · depth 1 km
M 4.8 mbJuly 7, 1973
64 km SE of Nikolski, Alaska · depth 47 km
M 5.4 mbJuly 5, 1973
97 km WSW of Elfin Cove, Alaska · depth 33 km
M 4.6 mbJuly 4, 1973
Southeastern Alaska · depth 33 km
M 4.7 mbJuly 4, 1973
194 km E of Atka, Alaska · depth 41 km
M 4.5 mbJuly 4, 1973
58 km WSW of Elfin Cove, Alaska · depth 33 km
M 5.1 mbJuly 3, 1973
93 km WSW of Elfin Cove, Alaska · depth 33 km
M 6.0 msJuly 3, 1973
101 km WSW of Elfin Cove, Alaska · depth 33 km
M 4.6 mbJuly 3, 1973
83 km W of Elfin Cove, Alaska · depth 33 km
M 4.5 mbJuly 2, 1973
84 km WSW of Elfin Cove, Alaska · depth 33 km
M 5.2 mbJuly 1, 1973
65 km WSW of Pelican, Alaska · depth 33 km
M 6.7 msJuly 1, 1973
66 km WSW of Pelican, Alaska · depth 33 km
M 5.4 mbJune 18, 1973
219 km SSE of Unalaska, Alaska · depth 15 km
M 4.8 mbJune 5, 1973
99 km SSW of False Pass, Alaska · depth 17 km
M 6.0 mbMay 29, 1973
96 km SSW of False Pass, Alaska · depth 30 km
M 4.9 mbMay 25, 1973
217 km SSE of King Cove, Alaska · depth 39 km
M 4.9 mbMay 20, 1973
70 km WNW of Nikiski, Alaska · depth 118 km
M 4.7 mbMay 18, 1973
64 km N of Petersville, Alaska · depth 128 km
M 4.5 mbMay 12, 1973
147 km S of False Pass, Alaska · depth 30 km
M 4.7 mbMarch 20, 1973
107 km S of Unalaska, Alaska · depth 16 km
M 4.5 mbMarch 19, 1973
126 km S of Cordova, Alaska · depth 35 km
M 4.8 mbMarch 12, 1973
65 km SE of Nikolski, Alaska · depth 15 km
M 4.5 mbFebruary 28, 1973
111 km ESE of Akutan, Alaska · depth 33 km
M 4.7 mbFebruary 27, 1973
54 km SSE of Nikolski, Alaska · depth 47 km
M 5.5 mbFebruary 20, 1973
163 km ENE of Kodiak, Alaska · depth 12 km
M 4.5 mbFebruary 18, 1973
197 km SE of Akutan, 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.