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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 4.6 mwrOctober 20, 2020
112 km SSE of Sand Point, Alaska · depth 23 km
M 4.7 mbOctober 20, 2020
131 km SSE of Sand Point, Alaska · depth 14 km
M 4.7 mbOctober 20, 2020
south of Alaska · depth 20 km
M 4.8 mbOctober 20, 2020
129 km SSE of Sand Point, Alaska · depth 29 km
M 4.8 mbOctober 20, 2020
114 km SSE of Sand Point, Alaska · depth 33 km
M 4.8 mbOctober 20, 2020
139 km SSE of Sand Point, Alaska · depth 15 km
M 4.9 mbOctober 20, 2020
115 km SSE of Sand Point, Alaska · depth 21 km
M 4.9 mbOctober 19, 2020
97 km SSE of Sand Point, Alaska · depth 33 km
M 4.5 mbOctober 19, 2020
109 km SSE of Sand Point, Alaska · depth 27 km
M 4.6 mbOctober 19, 2020
136 km SSE of Sand Point, Alaska · depth 11 km
M 4.5 mbOctober 19, 2020
129 km SSE of Sand Point, Alaska · depth 19 km
M 4.8 mbOctober 19, 2020
106 km SSE of Sand Point, Alaska · depth 27 km
M 4.5 mbOctober 19, 2020
121 km SSE of Sand Point, Alaska · depth 21 km
M 4.6 mbOctober 19, 2020
110 km SSE of Sand Point, Alaska · depth 28 km
M 5.9 mwwOctober 19, 2020
118 km SSE of Sand Point, Alaska · depth 21 km
M 5.9 mwwOctober 19, 2020
144 km SSE of Sand Point, Alaska · depth 31 km
M 4.5 mbOctober 19, 2020
112 km SSE of Sand Point, Alaska · depth 31 km
M 5.1 mbOctober 19, 2020
113 km SSE of Sand Point, Alaska · depth 27 km
M 5.5 mbOctober 19, 2020
114 km SSE of Sand Point, Alaska · depth 27 km
M 4.7 mbOctober 19, 2020
96 km SE of Sand Point, Alaska · depth 31 km
M 5.2 mbOctober 19, 2020
116 km SSE of Sand Point, Alaska · depth 23 km
M 4.5 mbOctober 19, 2020
127 km SSE of Sand Point, Alaska · depth 19 km
M 4.6 mbOctober 19, 2020
98 km SSE of Sand Point, Alaska · depth 37 km
M 5.0 mbOctober 19, 2020
125 km SSE of Sand Point, Alaska · depth 17 km
M 5.7 mbOctober 19, 2020
104 km SSE of Sand Point, Alaska · depth 26 km
M 5.7 mbOctober 19, 2020
114 km SSE of Sand Point, Alaska · depth 23 km
M 7.6 mwwOctober 19, 2020
2020 Sand Point, Alaska Earthquake · depth 28 km
M 4.7 mlOctober 10, 2020
110 km SSE of Port Graham, Alaska · depth 46 km
M 4.9 mbOctober 10, 2020
125 km SSW of Nikolski, Alaska · depth 10 km
M 5.7 mwwOctober 8, 2020
43 km ESE of Nikolski, Alaska · depth 32 km
M 5.9 mwwOctober 6, 2020
68 km SE of Sand Point, Alaska · depth 31 km
M 5.2 mwwSeptember 28, 2020
120 km SSW of Nikolski, Alaska · depth 15 km
M 4.5 mbSeptember 27, 2020
123 km SSW of Nikolski, Alaska · depth 23 km
M 5.5 mwwSeptember 27, 2020
129 km SSW of Nikolski, Alaska · depth 17 km
M 4.9 mlSeptember 25, 2020
130 km SE of Perryville, Alaska · depth 27 km
M 4.5 mwrAugust 23, 2020
151 km S of False Pass, Alaska · depth 35 km
M 4.9 mwwAugust 23, 2020
113 km SSW of Nikolski, Alaska · depth 18 km
M 5.0 mwwAugust 20, 2020
82 km SSE of False Pass, Alaska · depth 53 km
M 5.1 mwwAugust 19, 2020
45 km SSE of Sand Point, Alaska · depth 44 km
M 5.1 mwwAugust 19, 2020
51 km SSE of Sand Point, Alaska · depth 36 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.