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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 mbNovember 19, 2009
164 km ESE of Nikolski, Alaska · depth 28 km
M 4.7 mbNovember 15, 2009
Fox Islands, Aleutian Islands, Alaska · depth 79 km
M 5.2 mbNovember 13, 2009
63 km SSE of Nikolski, Alaska · depth 40 km
M 5.0 mbNovember 10, 2009
63 km SSE of Nikolski, Alaska · depth 32 km
M 5.1 mwcNovember 9, 2009
Fox Islands, Aleutian Islands, Alaska · depth 31 km
M 5.3 mbNovember 8, 2009
75 km SSE of Nikolski, Alaska · depth 34 km
M 4.8 mbNovember 5, 2009
214 km SSW of Nikolski, Alaska · depth 26 km
M 4.7 mbOctober 16, 2009
123 km E of Nikolski, Alaska · depth 35 km
M 4.9 mbOctober 15, 2009
127 km S of Unalaska, Alaska · depth 10 km
M 5.5 mwcOctober 15, 2009
114 km S of Unalaska, Alaska · depth 20 km
M 6.4 mwcOctober 13, 2009
123 km ESE of Nikolski, Alaska · depth 14 km
M 4.5 mbOctober 13, 2009
134 km ESE of Nikolski, Alaska · depth 28 km
M 4.7 mbOctober 13, 2009
122 km E of Nikolski, Alaska · depth 38 km
M 5.0 mbOctober 13, 2009
117 km ESE of Nikolski, Alaska · depth 38 km
M 5.3 mwcOctober 13, 2009
116 km ESE of Nikolski, Alaska · depth 39 km
M 4.7 mbOctober 13, 2009
136 km ESE of Nikolski, Alaska · depth 10 km
M 6.5 mwcOctober 13, 2009
127 km E of Nikolski, Alaska · depth 24 km
M 4.5 mbSeptember 26, 2009
48 km ESE of Sand Point, Alaska · depth 15 km
M 4.7 mbSeptember 25, 2009
145 km NNW of Diomede, Alaska · depth 16 km
M 5.1 mwSeptember 25, 2009
148 km NNW of Diomede, Alaska · depth 12 km
M 4.6 mbSeptember 18, 2009
84 km SE of Sand Point, Alaska · depth 16 km
M 4.5 mbSeptember 18, 2009
260 km SE of Nikolski, Alaska · depth 16 km
M 5.1 mwcSeptember 16, 2009
84 km SSW of Nikolski, Alaska · depth 35 km
M 4.7 mbSeptember 4, 2009
113 km SSE of Akhiok, Alaska · depth 5 km
M 4.8 mbAugust 28, 2009
117 km E of Nikolski, Alaska · depth 42 km
M 4.6 mbAugust 22, 2009
66 km SE of Denali National Park, Alaska · depth 134 km
M 5.1 mwAugust 19, 2009
15 km NE of Beluga, Alaska · depth 66 km
M 5.6 mwJuly 25, 2009
181 km SE of Cordova, Alaska · depth 10 km
M 4.6 mbJuly 15, 2009
38 km SSW of Skwentna, Alaska · depth 91 km
M 5.4 mwJune 22, 2009
36 km E of Skwentna, Alaska · depth 65 km
M 4.5 mbJune 21, 2009
81 km S of Nikolski, Alaska · depth 9 km
M 5.0 mwJune 7, 2009
66 km NNW of Elfin Cove, Alaska · depth 5 km
M 5.3 mwcJune 6, 2009
79 km SE of False Pass, Alaska · depth 43 km
M 4.6 mbJune 4, 2009
140 km SW of Nikolski, Alaska · depth 26 km
M 4.6 mwMay 24, 2009
48 km E of Pedro Bay, Alaska · depth 126 km
M 4.6 mbMay 17, 2009
124 km SE of Old Harbor, Alaska · depth 10 km
M 4.6 mbMay 16, 2009
113 km SE of Old Harbor, Alaska · depth 10 km
M 4.5 mbMay 16, 2009
121 km SSE of Old Harbor, Alaska · depth 3 km
M 5.3 mwMay 16, 2009
124 km SSE of Old Harbor, Alaska · depth 21 km
M 5.9 mwMay 16, 2009
136 km SE of Old Harbor, 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.