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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 5.7 mwwMay 28, 2017
178 km SSE of King Cove, Alaska · depth 16 km
M 5.9 mwwMay 24, 2017
163 km ESE of Nikolski, Alaska · depth 10 km
M 5.3 mwwMay 24, 2017
163 km ESE of Nikolski, Alaska · depth 11 km
M 5.1 mwwMay 24, 2017
126 km SE of Akutan, Alaska · depth 10 km
M 4.6 mbMay 19, 2017
153 km SW of Nikolski, Alaska · depth 10 km
M 5.2 mwwMay 19, 2017
151 km SW of Nikolski, Alaska · depth 22 km
M 4.9 mbMay 12, 2017
75 km WSW of False Pass, Alaska · depth 3 km
M 4.5 mwMay 12, 2017
Kodiak Island region, Alaska · depth 14 km
M 5.4 mwMay 11, 2017
69 km SE of Old Harbor, Alaska · depth 10 km
M 5.3 mwMay 7, 2017
14 km N of Ninilchik, Alaska · depth 67 km
M 5.2 mwwMay 6, 2017
146 km SW of Nikolski, Alaska · depth 32 km
M 4.7 mwrMay 4, 2017
45 km NW of Mosquito Lake, Alaska · depth 10 km
M 4.9 mbMay 1, 2017
38 km NW of Mosquito Lake, Alaska · depth 11 km
M 5.0 mwrMay 1, 2017
43 km NW of Mosquito Lake, Alaska · depth 12 km
M 4.8 mbMay 1, 2017
37 km NW of Mosquito Lake, Alaska · depth 10 km
M 5.7 mbMay 1, 2017
42 km NW of Mosquito Lake, Alaska · depth 10 km
M 5.6 mbMay 1, 2017
41 km NW of Mosquito Lake, Alaska · depth 4 km
M 6.3 mwwMay 1, 2017
48 km NW of Mosquito Lake, Alaska · depth 3 km
M 5.0 mwrMay 1, 2017
57 km NW of Mosquito Lake, Alaska · depth 8 km
M 6.2 mwwMay 1, 2017
47 km NW of Mosquito Lake, Alaska · depth 10 km
M 4.7 mbMay 1, 2017
101 km WSW of Nikolski, Alaska · depth 55 km
M 4.9 mwApril 29, 2017
54 km SSE of Denali National Park, Alaska · depth 12 km
M 5.0 mwApril 27, 2017
39 km W of Karluk, Alaska · depth 1 km
M 4.5 mbApril 25, 2017
47 km ESE of King Cove, Alaska · depth 105 km
M 4.5 mwMarch 28, 2017
Alaska Peninsula · depth 46 km
M 4.8 mwMarch 24, 2017
34 km S of Ugashik, Alaska · depth 7 km
M 5.1 mbMarch 14, 2017
132 km SW of Nikolski, Alaska · depth 54 km
M 4.5 mbMarch 7, 2017
139 km SW of Nikolski, Alaska · depth 35 km
M 5.6 mwMarch 2, 2017
48 km WNW of Nanwalek, Alaska · depth 78 km
M 4.9 mbFebruary 27, 2017
120 km SE of Perryville, Alaska · depth 37 km
M 5.3 mlFebruary 13, 2017
20 km NE of Nabesna, Alaska · depth 9 km
M 5.2 mwJanuary 31, 2017
64 km SE of Denali National Park, Alaska · depth 133 km
M 4.5 mbJanuary 26, 2017
107 km SSW of False Pass, Alaska · depth 27 km
M 4.5 mlJanuary 26, 2017
52 km W of Skwentna, Alaska · depth 142 km
M 4.5 mbJanuary 16, 2017
30 km W of Elfin Cove, Alaska · depth 13 km
M 4.9 mbJanuary 16, 2017
69 km SE of Nikolski, Alaska · depth 42 km
M 5.2 mwwJanuary 9, 2017
69 km WNW of Nikolski, Alaska · depth 81 km
M 4.7 mbNovember 28, 2016
Unimak Island region, Alaska · depth 22 km
M 4.6 mwrNovember 23, 2016
92 km S of Sand Point, Alaska · depth 29 km
M 4.9 mbNovember 22, 2016
140 km SSE of Sand Point, Alaska · depth 15 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.