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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 5.4 mbMay 18, 1975
70 km WSW of Cantwell, Alaska · depth 106 km
M 5.4 mbMay 16, 1975
87 km SSE of False Pass, Alaska · depth 9 km
M 4.7 mbMay 8, 1975
81 km SSE of Old Harbor, Alaska · depth 33 km
M 4.6 mbMay 6, 1975
92 km S of False Pass, Alaska · depth 49 km
M 4.9 mbMay 2, 1975
125 km SSE of Nikolski, Alaska · depth 33 km
M 4.5 mbMay 1, 1975
115 km SSW of Unalaska, Alaska · depth 8 km
M 4.8 mbMay 1, 1975
87 km SW of Unalaska, Alaska · depth 33 km
M 5.1 mbMay 1, 1975
125 km ESE of Nikolski, Alaska · depth 17 km
M 4.7 mbApril 19, 1975
74 km S of False Pass, Alaska · depth 49 km
M 5.5 mbApril 11, 1975
84 km S of False Pass, Alaska · depth 20 km
M 5.4 mbApril 8, 1975
214 km ESE of Nikolski, Alaska · depth 33 km
M 4.5 mbMarch 17, 1975
25 km WNW of Old Harbor, Alaska · depth 65 km
M 4.8 mbFebruary 15, 1975
105 km SW of Nikolski, Alaska · depth 33 km
M 4.6 mbFebruary 11, 1975
103 km SSW of Sand Point, Alaska · depth 21 km
M 4.5 mbFebruary 8, 1975
41 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbFebruary 1, 1975
152 km S of False Pass, Alaska · depth 18 km
M 4.9 mbJanuary 25, 1975
253 km SW of Nikolski, Alaska · depth 33 km
M 4.9 mbJanuary 21, 1975
62 km SSE of Chignik, Alaska · depth 35 km
M 4.6 mbJanuary 21, 1975
50 km SSE of Nikolski, Alaska · depth 33 km
M 5.7 mbJanuary 13, 1975
174 km WSW of Nikolski, Alaska · depth 42 km
M 4.8 mbJanuary 13, 1975
12 km S of Susitna, Alaska · depth 66 km
M 4.7 mbJanuary 12, 1975
55 km SSE of Lowell Point, Alaska · depth 46 km
M 5.1 mbJanuary 6, 1975
18 km N of Akutan, Alaska · depth 102 km
M 5.9 mbJanuary 1, 1975
23 km NE of Willow, Alaska · depth 66 km
M 5.1 mbDecember 30, 1974
21 km SSE of Susitna North, Alaska · depth 62 km
M 5.6 mbDecember 29, 1974
5 km N of Susitna, Alaska · depth 67 km
M 4.6 mbDecember 28, 1974
84 km SSE of False Pass, Alaska · depth 44 km
M 5.8 msDecember 7, 1974
178 km SW of Nikolski, Alaska · depth 33 km
M 4.5 mbDecember 4, 1974
178 km SW of Nikolski, Alaska · depth 39 km
M 5.3 mbNovember 28, 1974
138 km S of False Pass, Alaska · depth 32 km
M 4.6 mbNovember 22, 1974
56 km E of Port Alsworth, Alaska · depth 158 km
M 4.6 mbNovember 20, 1974
94 km S of Kokhanok, Alaska · depth 17 km
M 5.0 mbNovember 20, 1974
68 km SSE of Akutan, Alaska · depth 57 km
M 4.8 mbNovember 15, 1974
Alaska Peninsula · depth 42 km
M 5.6 msNovember 14, 1974
72 km S of Kokhanok, Alaska · depth 37 km
M 4.9 mbOctober 31, 1974
126 km E of Nikolski, Alaska · depth 36 km
M 4.7 mbOctober 28, 1974
41 km ESE of Ugashik, Alaska · depth 14 km
M 4.5 mbOctober 25, 1974
70 km SSE of Akhiok, Alaska · depth 32 km
M 4.7 mbOctober 18, 1974
138 km S of False Pass, Alaska · depth 42 km
M 4.8 msOctober 12, 1974
93 km SSE of Akhiok, 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.