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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 · 200 km WSW of Yakutat, AlaskaNovember 30, 1987M 7.9 · 261 km SE of Chiniak, AlaskaJanuary 23, 2018M 7.9 · 2002 Denali Fault, Alaska EarthquakeNovember 3, 2002M 7.9 · Kodiak Island region, AlaskaOctober 9, 1900M 7.8 · 81 km E of Nikolski, AlaskaJuly 2, 1965M 7.8 · 234 km SSW of Nikolski, AlaskaMarch 7, 1929
All recorded earthquakes
M 4.5 mwrNovember 18, 2025
99 km SSE of Sand Point, Alaska · depth 32 km
M 4.7 mbNovember 9, 2025
189 km WSW of Nikolski, Alaska · depth 54 km
M 5.4 mlOctober 30, 2025
48 km ESE of Fox River, Alaska · depth 24 km
M 4.6 mlOctober 24, 2025
14 km SE of Skwentna, Alaska · depth 67 km
M 4.7 mbOctober 24, 2025
102 km SSE of Sand Point, Alaska · depth 35 km
M 4.6 mbOctober 23, 2025
78 km S of Sand Point, Alaska · depth 35 km
M 5.1 mwwOctober 17, 2025
49 km S of Akutan, Alaska · depth 85 km
M 4.6 mbOctober 10, 2025
97 km SSE of Sand Point, Alaska · depth 32 km
M 4.6 mwrOctober 5, 2025
129 km E of McCarthy, Alaska · depth 12 km
M 4.6 mlOctober 2, 2025
57 km W of Karluk, Alaska · depth 4 km
M 4.6 mlSeptember 24, 2025
114 km E of Chignik, Alaska · depth 45 km
M 4.6 mlSeptember 17, 2025
117 km SE of Old Harbor, Alaska · depth 12 km
M 5.1 mwwSeptember 16, 2025
130 km SSW of Nikolski, Alaska · depth 27 km
M 4.5 mbSeptember 13, 2025
185 km SW of Nikolski, Alaska · depth 19 km
M 5.4 mwwSeptember 6, 2025
81 km SSW of Nikolski, Alaska · depth 38 km
M 5.1 mwwSeptember 6, 2025
141 km SSE of Sand Point, Alaska · depth 10 km
M 5.2 mwwSeptember 4, 2025
92 km SSW of Nikolski, Alaska · depth 35 km
M 5.2 mwwSeptember 4, 2025
94 km SSW of Nikolski, Alaska · depth 35 km
M 4.6 mbSeptember 4, 2025
100 km SSW of Nikolski, Alaska · depth 35 km
M 5.9 mwwSeptember 3, 2025
92 km SSW of Nikolski, Alaska · depth 18 km
M 4.6 mlSeptember 1, 2025
125 km SSE of Old Harbor, Alaska · depth 11 km
M 4.5 mwwSeptember 1, 2025
137 km SSE of Old Harbor, Alaska · depth 12 km
M 4.9 mwwSeptember 1, 2025
128 km SE of Old Harbor, Alaska · depth 11 km
M 4.6 mbSeptember 1, 2025
116 km SE of Old Harbor, Alaska · depth 12 km
M 4.7 mbSeptember 1, 2025
134 km SSE of Old Harbor, Alaska · depth 12 km
M 5.6 mwwSeptember 1, 2025
133 km SE of Old Harbor, Alaska · depth 12 km
M 5.0 mwwAugust 26, 2025
103 km SSE of Sand Point, Alaska · depth 31 km
M 5.2 mwwAugust 14, 2025
144 km SSW of Nikolski, Alaska · depth 10 km
M 4.7 mbAugust 14, 2025
139 km SSW of Nikolski, Alaska · depth 10 km
M 4.5 mbAugust 11, 2025
154 km ESE of Akutan, Alaska · depth 10 km
M 4.6 mwwAugust 6, 2025
24 km WSW of Petersville, Alaska · depth 88 km
M 5.3 mwwJuly 27, 2025
23 km N of Dutch Harbor, Alaska · depth 83 km
M 4.8 mbJuly 22, 2025
98 km SSE of Sand Point, Alaska · depth 41 km
M 6.2 mwwJuly 20, 2025
91 km SSE of Sand Point, Alaska · depth 40 km
M 4.7 mwrJuly 20, 2025
88 km SSE of Sand Point, Alaska · depth 40 km
M 5.6 mwwJuly 17, 2025
96 km SSE of Sand Point, Alaska · depth 35 km
M 5.2 mwrJuly 17, 2025
85 km SSE of Sand Point, Alaska · depth 35 km
M 5.1 mwrJuly 17, 2025
86 km SSE of Sand Point, Alaska · depth 36 km
M 5.2 mbJuly 16, 2025
102 km SSE of Sand Point, Alaska · depth 21 km
M 4.5 mbJuly 16, 2025
99 km S of Sand Point, Alaska · depth 20 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.