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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 4.5 mbAugust 27, 1989
42 km ESE of Akutan, Alaska · depth 55 km
M 4.9 mbAugust 23, 1989
76 km SE of Nikolski, Alaska · depth 33 km
M 5.3 mbAugust 23, 1989
86 km SE of Nikolski, Alaska · depth 33 km
M 4.6 mbAugust 23, 1989
189 km SSE of Nikolski, Alaska · depth 33 km
M 4.7 mbAugust 23, 1989
73 km SE of Nikolski, Alaska · depth 33 km
M 5.5 mwAugust 23, 1989
69 km SE of Nikolski, Alaska · depth 33 km
M 4.5 mbAugust 10, 1989
100 km SE of Akutan, Alaska · depth 33 km
M 4.8 mbAugust 6, 1989
81 km NW of Yakutat, Alaska · depth -3 km
M 5.3 mwAugust 6, 1989
82 km NW of Yakutat, Alaska · depth 10 km
M 4.8 mbJuly 31, 1989
101 km SSW of False Pass, Alaska · depth 58 km
M 4.6 mbJuly 17, 1989
62 km NNW of Nikolski, Alaska · depth 112 km
M 5.1 mbJuly 8, 1989
200 km SE of Akutan, Alaska · depth 33 km
M 4.6 mbJune 28, 1989
74 km ESE of Denali National Park, Alaska · depth 118 km
M 4.7 mbJune 25, 1989
155 km SW of Nikolski, Alaska · depth 33 km
M 5.6 mwJune 16, 1989
24 km N of Larsen Bay, Alaska · depth 49 km
M 4.5 mbJune 11, 1989
296 km SW of Yakutat, Alaska · depth 10 km
M 4.8 mbJune 2, 1989
22 km SSW of Sand Point, Alaska · depth 58 km
M 6.3 mwMay 19, 1989
23 km NE of Akutan, Alaska · depth 104 km
M 4.7 mbMay 18, 1989
94 km WSW of Unalaska, Alaska · depth 33 km
M 4.8 mbMay 18, 1989
95 km SW of Unalaska, Alaska · depth 33 km
M 4.9 mbMay 16, 1989
83 km SSE of Nikolski, Alaska · depth 33 km
M 4.6 mbMay 16, 1989
8 km W of Homer, Alaska · depth 48 km
M 4.7 mbMay 15, 1989
162 km S of Nikolski, Alaska · depth 33 km
M 4.6 mbMay 15, 1989
116 km E of Nikolski, Alaska · depth 33 km
M 4.7 mbMay 15, 1989
109 km SSW of Unalaska, Alaska · depth 33 km
M 4.5 mbMay 13, 1989
287 km ESE of Chiniak, Alaska · depth 12 km
M 4.8 mbMay 13, 1989
59 km SSE of Nikolski, Alaska · depth 33 km
M 5.0 mbMay 11, 1989
Fox Islands, Aleutian Islands, Alaska · depth 33 km
M 4.6 mbMay 8, 1989
3 km NE of Kodiak Station, Alaska · depth 48 km
M 4.6 mbMay 8, 1989
50 km NE of Pedro Bay, Alaska · depth 156 km
M 4.7 mbMay 7, 1989
70 km SSE of King Cove, Alaska · depth 33 km
M 4.9 mbMay 3, 1989
58 km E of Chenega, Alaska · depth 9 km
M 4.5 mbApril 30, 1989
26 km E of Kobuk, Alaska · depth 10 km
M 5.0 mbApril 27, 1989
23 km ENE of Kobuk, Alaska · depth 10 km
M 4.5 mbApril 25, 1989
21 km E of Kobuk, Alaska · depth 10 km
M 4.6 mbApril 24, 1989
54 km WNW of Nanwalek, Alaska · depth 87 km
M 5.4 mwApril 23, 1989
22 km ENE of Kobuk, Alaska · depth 10 km
M 4.6 mbApril 18, 1989
41 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbApril 17, 1989
62 km WNW of Happy Valley, Alaska · depth 103 km
M 4.6 mlApril 8, 1989
Gulf of Alaska · depth 10 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.