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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 4.8 mbJanuary 31, 1987
74 km SE of Akutan, Alaska · depth 33 km
M 4.6 mbJanuary 24, 1987
125 km SE of Old Harbor, Alaska · depth 33 km
M 4.5 mbJanuary 23, 1987
98 km SSW of Nikolski, Alaska · depth 33 km
M 4.7 mbJanuary 23, 1987
181 km WSW of Nikolski, Alaska · depth 33 km
M 4.6 mbJanuary 15, 1987
68 km SSW of Unalaska, Alaska · depth 33 km
M 4.5 mbJanuary 14, 1987
68 km NW of Nikolski, Alaska · depth 33 km
M 4.6 mbJanuary 13, 1987
79 km SSW of Unalaska, Alaska · depth 33 km
M 4.5 mbJanuary 10, 1987
69 km SW of Nikolski, Alaska · depth 33 km
M 4.9 mbJanuary 7, 1987
80 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbJanuary 5, 1987
61 km S of Nikolski, Alaska · depth 33 km
M 4.7 mbJanuary 5, 1987
46 km SW of Nikolski, Alaska · depth 33 km
M 6.8 mwJanuary 5, 1987
64 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbDecember 23, 1986
185 km ESE of Atka, Alaska · depth 33 km
M 4.6 mbDecember 21, 1986
92 km NW of Yakutat, Alaska · depth 11 km
M 4.8 mbNovember 10, 1986
62 km SW of Nikolski, Alaska · depth 33 km
M 4.8 mbNovember 9, 1986
55 km SSE of Nikolski, Alaska · depth 33 km
M 5.1 mwNovember 9, 1986
82 km SSE of Nikolski, Alaska · depth 33 km
M 4.9 mbNovember 8, 1986
93 km SSW of Nikolski, Alaska · depth 33 km
M 4.7 mbNovember 4, 1986
49 km WNW of Beluga, Alaska · depth 98 km
M 5.7 mwOctober 26, 1986
120 km NW of Nikolski, Alaska · depth 214 km
M 5.1 mbOctober 26, 1986
149 km S of False Pass, Alaska · depth 33 km
M 4.7 mbOctober 26, 1986
149 km S of False Pass, Alaska · depth 33 km
M 5.0 mbOctober 23, 1986
66 km SE of Nikolski, Alaska · depth 33 km
M 4.8 mbOctober 20, 1986
94 km S of Unalaska, Alaska · depth 33 km
M 4.7 mbOctober 19, 1986
126 km WSW of Nikolski, Alaska · depth 33 km
M 4.6 mbOctober 15, 1986
58 km E of Pedro Bay, Alaska · depth 121 km
M 4.9 mbOctober 14, 1986
91 km S of Nikolski, Alaska · depth 33 km
M 4.5 mbOctober 9, 1986
16 km ESE of Susitna North, Alaska · depth 58 km
M 4.7 mbSeptember 28, 1986
67 km W of False Pass, Alaska · depth 110 km
M 4.5 mbSeptember 27, 1986
162 km WSW of Nikolski, Alaska · depth 33 km
M 5.0 mbSeptember 26, 1986
38 km ESE of Akutan, Alaska · depth 33 km
M 4.5 mbSeptember 23, 1986
83 km SSE of Akhiok, Alaska · depth 33 km
M 4.8 mbSeptember 20, 1986
78 km SSE of False Pass, Alaska · depth 33 km
M 4.6 mbSeptember 20, 1986
57 km SW of Unalaska, Alaska · depth 33 km
M 4.6 mbSeptember 18, 1986
17 km ENE of Willow, Alaska · depth 57 km
M 5.9 mwSeptember 16, 1986
87 km SSE of Akhiok, Alaska · depth 33 km
M 4.5 mbSeptember 15, 1986
34 km E of Chitina, Alaska · depth 52 km
M 4.5 mbSeptember 14, 1986
80 km SSE of Akhiok, Alaska · depth 33 km
M 4.8 mbSeptember 13, 1986
95 km SSE of Akhiok, Alaska · depth 33 km
M 4.6 mbSeptember 13, 1986
89 km SSE of Akhiok, Alaska · depth 33 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.