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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 4.8 mbJune 13, 1986
140 km ESE of Akutan, Alaska · depth 33 km
M 4.7 mbJune 13, 1986
162 km S of False Pass, Alaska · depth 33 km
M 5.3 mwJune 9, 1986
107 km WNW of Dutch Harbor, Alaska · depth 33 km
M 5.4 mwJune 4, 1986
57 km NNW of Tanana, Alaska · depth 10 km
M 4.5 mbMay 29, 1986
29 km SSW of Nanwalek, Alaska · depth 61 km
M 5.1 mwMay 23, 1986
96 km SE of Pope-Vannoy Landing, Alaska · depth 80 km
M 4.5 mbMay 22, 1986
56 km E of Akutan, Alaska · depth 77 km
M 4.6 mbMay 21, 1986
95 km NNW of Yakutat, Alaska · depth 16 km
M 4.7 mbMay 17, 1986
78 km SW of Nanwalek, Alaska · depth 75 km
M 4.5 mbMay 15, 1986
24 km SSW of King Cove, Alaska · depth 33 km
M 4.5 mbMay 14, 1986
137 km E of Chignik, Alaska · depth 99 km
M 4.7 mbMay 11, 1986
112 km SE of Perryville, Alaska · depth 33 km
M 4.6 mbMay 9, 1986
33 km NE of Akutan, Alaska · depth 101 km
M 4.7 mbMay 7, 1986
130 km SE of Perryville, Alaska · depth 33 km
M 4.8 mbApril 27, 1986
25 km SE of Nikolski, Alaska · depth 33 km
M 4.5 mbApril 22, 1986
152 km WNW of Nikolski, Alaska · depth 33 km
M 6.0 mwApril 11, 1986
93 km WNW of Dutch Harbor, Alaska · depth 33 km
M 5.0 mbApril 5, 1986
114 km SSE of King Cove, Alaska · depth 33 km
M 4.8 msApril 3, 1986
87 km SSE of Akhiok, Alaska · depth 33 km
M 4.6 mbApril 3, 1986
74 km SE of Akhiok, Alaska · depth 33 km
M 4.5 mbMarch 27, 1986
south of Alaska · depth 33 km
M 4.6 mbMarch 26, 1986
Fox Islands, Aleutian Islands, Alaska · depth 33 km
M 4.8 mbMarch 20, 1986
113 km WNW of Dutch Harbor, Alaska · depth 33 km
M 4.7 mbMarch 18, 1986
8 km WNW of Akhiok, Alaska · depth 86 km
M 4.6 mbMarch 18, 1986
102 km WNW of Dutch Harbor, Alaska · depth 33 km
M 4.7 mbMarch 18, 1986
101 km W of Dutch Harbor, Alaska · depth 33 km
M 4.7 mbMarch 12, 1986
120 km W of Dutch Harbor, Alaska · depth 33 km
M 4.7 mbMarch 11, 1986
110 km WNW of Dutch Harbor, Alaska · depth 33 km
M 4.6 mbMarch 9, 1986
112 km WNW of Dutch Harbor, Alaska · depth 33 km
M 5.7 mwMarch 9, 1986
95 km WNW of Dutch Harbor, Alaska · depth 33 km
M 4.6 mbMarch 9, 1986
88 km SSW of Nikolski, Alaska · depth 33 km
M 4.5 mbMarch 6, 1986
68 km SSE of Akhiok, Alaska · depth 33 km
M 5.5 mwMarch 6, 1986
83 km SSE of Akhiok, Alaska · depth 33 km
M 5.1 mbMarch 6, 1986
82 km SSE of Akhiok, Alaska · depth 33 km
M 4.9 mbMarch 4, 1986
197 km SE of Nikolski, Alaska · depth 33 km
M 4.8 mbMarch 4, 1986
180 km SE of Nikolski, Alaska · depth 33 km
M 5.4 mwMarch 4, 1986
202 km SE of Nikolski, Alaska · depth 33 km
M 4.6 mbFebruary 28, 1986
194 km SSW of Nikolski, Alaska · depth 33 km
M 4.7 mbFebruary 28, 1986
76 km ENE of Port Alsworth, Alaska · depth 125 km
M 4.6 mbFebruary 24, 1986
67 km NNE of Petersville, Alaska · depth 112 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.