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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 5.1 mwwAugust 18, 2020
125 km SE of Perryville, Alaska · depth 14 km
M 5.8 mwwAugust 16, 2020
241 km ESE of Atka, Alaska · depth 18 km
M 5.7 mwwAugust 13, 2020
156 km ESE of Akutan, Alaska · depth 28 km
M 5.1 mwwAugust 9, 2020
122 km SE of Perryville, Alaska · depth 22 km
M 5.5 mwwAugust 8, 2020
79 km SSW of Sand Point, Alaska · depth 39 km
M 5.4 mwwAugust 8, 2020
140 km SSE of Perryville, Alaska · depth 28 km
M 5.1 mwwAugust 5, 2020
94 km SSW of Sand Point, Alaska · depth 7 km
M 5.2 mwwAugust 4, 2020
79 km SSW of Sand Point, Alaska · depth 35 km
M 4.8 mbAugust 2, 2020
89 km SSW of Sand Point, Alaska · depth 31 km
M 4.7 mwrAugust 1, 2020
63 km S of Sand Point, Alaska · depth 39 km
M 5.0 mlJuly 30, 2020
134 km SSE of Perryville, Alaska · depth 34 km
M 4.8 mwwJuly 29, 2020
82 km SSW of Sand Point, Alaska · depth 38 km
M 5.6 mwwJuly 29, 2020
44 km SSE of Sand Point, Alaska · depth 39 km
M 5.0 mwwJuly 28, 2020
49 km SSE of Sand Point, Alaska · depth 42 km
M 6.1 mwwJuly 28, 2020
75 km SW of Sand Point, Alaska · depth 35 km
M 5.5 mwwJuly 27, 2020
46 km SSE of Sand Point, Alaska · depth 37 km
M 4.9 mwwJuly 26, 2020
68 km SSE of Sand Point, Alaska · depth 36 km
M 4.5 mlJuly 26, 2020
99 km SSE of Perryville, Alaska · depth 33 km
M 4.7 mbJuly 26, 2020
51 km SSE of Sand Point, Alaska · depth 38 km
M 5.0 mwwJuly 24, 2020
55 km SSW of Sand Point, Alaska · depth 45 km
M 4.5 mwrJuly 24, 2020
80 km S of Perryville, Alaska · depth 42 km
M 4.5 mbJuly 24, 2020
59 km ESE of Sand Point, Alaska · depth 44 km
M 5.0 mwwJuly 24, 2020
58 km S of Sand Point, Alaska · depth 43 km
M 4.7 mwrJuly 23, 2020
54 km S of Sand Point, Alaska · depth 41 km
M 5.0 mwwJuly 23, 2020
57 km ESE of Sand Point, Alaska · depth 45 km
M 5.5 mwwJuly 22, 2020
73 km S of Ivanof Bay, Alaska · depth 36 km
M 4.5 mlJuly 22, 2020
120 km SSE of Perryville, Alaska · depth 13 km
M 4.9 mwrJuly 22, 2020
56 km SSW of Sand Point, Alaska · depth 43 km
M 4.5 mlJuly 22, 2020
134 km SSE of Perryville, Alaska · depth 18 km
M 4.7 mlJuly 22, 2020
98 km SSE of Perryville, Alaska · depth 37 km
M 4.7 mlJuly 22, 2020
98 km SSE of Perryville, Alaska · depth 35 km
M 5.7 mwrJuly 22, 2020
76 km ESE of Sand Point, Alaska · depth 45 km
M 4.5 mlJuly 22, 2020
126 km SSE of Perryville, Alaska · depth 26 km
M 5.6 mbJuly 22, 2020
122 km ESE of Sand Point, Alaska · depth 25 km
M 6.1 mbJuly 22, 2020
101 km ESE of Sand Point, Alaska · depth 17 km
M 7.8 mwwJuly 22, 2020
2020 Perryville, Alaska Earthquake · depth 28 km
M 4.6 mbJuly 12, 2020
103 km SSW of Nikolski, Alaska · depth 21 km
M 5.1 mwwJuly 8, 2020
108 km SSE of Akhiok, Alaska · depth 3 km
M 5.5 mwwJuly 5, 2020
227 km S of Sand Point, Alaska · depth 10 km
M 4.6 mbJuly 2, 2020
163 km SSE of King Cove, 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.