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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 5.2 mwcSeptember 21, 1997
156 km SW of Nikolski, Alaska · depth 33 km
M 4.6 mbSeptember 17, 1997
63 km ESE of Akutan, Alaska · depth 57 km
M 4.5 mbSeptember 10, 1997
7 km SSW of Akhiok, Alaska · depth 10 km
M 4.5 mbAugust 26, 1997
109 km SW of Nikolski, Alaska · depth 64 km
M 4.6 mbAugust 8, 1997
60 km ESE of Akutan, Alaska · depth 73 km
M 4.6 mbAugust 6, 1997
26 km N of Fox River, Alaska · depth 37 km
M 4.6 mbJuly 25, 1997
85 km SSW of Nikolski, Alaska · depth 33 km
M 5.0 mbJuly 20, 1997
103 km ESE of Nikolski, Alaska · depth 10 km
M 4.6 mbJuly 20, 1997
106 km ESE of Nikolski, Alaska · depth 10 km
M 4.5 mbJuly 20, 1997
99 km ESE of Nikolski, Alaska · depth 10 km
M 6.1 mwcJuly 20, 1997
102 km ESE of Nikolski, Alaska · depth 14 km
M 4.5 mbJuly 3, 1997
56 km SSE of Nikolski, Alaska · depth 33 km
M 4.7 mbJune 3, 1997
67 km WNW of Nikolski, Alaska · depth 106 km
M 4.6 mlMay 30, 1997
153 km SE of Savoonga, Alaska · depth 5 km
M 4.7 mbMay 29, 1997
59 km S of King Cove, Alaska · depth 76 km
M 4.7 mbMay 21, 1997
62 km ENE of Nikolski, Alaska · depth 33 km
M 4.6 mbMay 19, 1997
207 km SE of Akutan, Alaska · depth 33 km
M 4.8 mbMay 18, 1997
31 km E of Akutan, Alaska · depth 67 km
M 4.7 mbMay 13, 1997
15 km NNW of Point Possession, Alaska · depth 59 km
M 6.0 mwcMay 8, 1997
189 km SW of Nikolski, Alaska · depth 33 km
M 5.3 mwMay 6, 1997
8 km NW of Knik-Fairview, Alaska · depth 31 km
M 4.5 mbApril 28, 1997
144 km ESE of Nikolski, Alaska · depth 33 km
M 4.6 mbApril 22, 1997
133 km S of False Pass, Alaska · depth 33 km
M 4.6 mbApril 21, 1997
175 km SW of Nikolski, Alaska · depth 33 km
M 4.6 mbApril 17, 1997
154 km ESE of Akutan, Alaska · depth 38 km
M 5.5 mwcApril 8, 1997
191 km E of Atka, Alaska · depth 46 km
M 4.8 mbApril 1, 1997
87 km NNW of Karluk, Alaska · depth 2 km
M 5.0 mbMarch 25, 1997
110 km S of False Pass, Alaska · depth 33 km
M 5.0 mbMarch 24, 1997
169 km SSE of Nikolski, Alaska · depth 33 km
M 4.9 mbMarch 18, 1997
122 km ESE of Nikolski, Alaska · depth 33 km
M 4.6 mbMarch 12, 1997
90 km S of Savoonga, Alaska · depth 10 km
M 4.5 mlMarch 12, 1997
277 km SSW of Nikolski, Alaska · depth 33 km
M 5.2 mwcMarch 2, 1997
37 km S of Unalaska, Alaska · depth 57 km
M 4.5 mbFebruary 24, 1997
45 km NNW of Gustavus, Alaska · depth 5 km
M 4.6 mbFebruary 23, 1997
26 km S of Port Heiden, Alaska · depth 95 km
M 4.7 mbFebruary 17, 1997
20 km WNW of Fishhook, Alaska · depth 47 km
M 5.0 mbJanuary 30, 1997
155 km SSE of Cordova, Alaska · depth 10 km
M 4.7 msJanuary 27, 1997
Fox Islands, Aleutian Islands, Alaska · depth 33 km
M 4.9 mbJanuary 23, 1997
196 km S of False Pass, Alaska · depth 33 km
M 4.5 mbJanuary 20, 1997
133 km SSE 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.