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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 mlDecember 12, 2021
113 km SSE of Chignik, Alaska · depth 7 km
M 5.2 mbDecember 5, 2021
165 km SE of Nikolski, Alaska · depth 10 km
M 4.5 mlNovember 15, 2021
151 km SSW of Akhiok, Alaska · depth 9 km
M 5.2 mwwNovember 4, 2021
69 km ESE of Nikolski, Alaska · depth 39 km
M 5.6 mwwOctober 31, 2021
115 km SSE of Perryville, Alaska · depth 25 km
M 5.1 mwwOctober 28, 2021
95 km SSE of Perryville, Alaska · depth 28 km
M 4.7 mlOctober 16, 2021
12 km SSW of Clam Gulch, Alaska · depth 54 km
M 6.9 mwwOctober 11, 2021
112 km E of Chignik, Alaska · depth 52 km
M 4.5 mbOctober 6, 2021
152 km S of False Pass, Alaska · depth 11 km
M 4.5 mbOctober 3, 2021
184 km WSW of Nikolski, Alaska · depth 46 km
M 4.8 mlOctober 1, 2021
137 km ESE of Chignik, Alaska · depth 45 km
M 4.8 mbOctober 1, 2021
190 km SW of Nikolski, Alaska · depth 35 km
M 5.2 mwwOctober 1, 2021
185 km SW of Nikolski, Alaska · depth 35 km
M 5.1 mwwSeptember 16, 2021
200 km SE of Chignik, Alaska · depth 33 km
M 5.6 mwwSeptember 16, 2021
181 km SE of Chignik, Alaska · depth 37 km
M 4.9 mlSeptember 14, 2021
9 km NW of Harding-Birch Lakes, Alaska · depth 4 km
M 4.7 mbSeptember 12, 2021
160 km S of False Pass, Alaska · depth 10 km
M 5.1 mwwSeptember 9, 2021
154 km S of False Pass, Alaska · depth 10 km
M 4.5 mwrSeptember 3, 2021
147 km S of False Pass, Alaska · depth 12 km
M 4.6 mwrSeptember 2, 2021
106 km SSE of Sand Point, Alaska · depth 26 km
M 4.5 mlAugust 25, 2021
64 km SE of Perryville, Alaska · depth 7 km
M 4.6 mwrAugust 17, 2021
70 km E of Nikolski, Alaska · depth 43 km
M 6.9 mwwAugust 14, 2021
125 km SE of Perryville, Alaska · depth 21 km
M 4.5 mlJuly 31, 2021
162 km ESE of Chignik, Alaska · depth 37 km
M 4.7 mlJuly 30, 2021
142 km S of Akhiok, Alaska · depth 12 km
M 5.5 mwwJuly 30, 2021
140 km SE of Chignik, Alaska · depth 43 km
M 4.8 mlJuly 29, 2021
150 km SSE of Chignik, Alaska · depth 1 km
M 4.7 mlJuly 29, 2021
128 km SSE of Perryville, Alaska · depth 3 km
M 5.4 mwwJuly 29, 2021
158 km SE of Chignik, Alaska · depth 21 km
M 5.0 mbJuly 29, 2021
142 km SE of Chignik, Alaska · depth 29 km
M 5.3 mwrJuly 29, 2021
155 km SE of Chignik, Alaska · depth 36 km
M 4.5 mlJuly 29, 2021
185 km SSW of Akhiok, Alaska · depth 37 km
M 4.5 mlJuly 29, 2021
164 km ESE of Chignik, Alaska · depth 28 km
M 4.8 mbJuly 29, 2021
195 km SSW of Akhiok, Alaska · depth 10 km
M 4.6 mlJuly 29, 2021
148 km SE of Chignik, Alaska · depth 41 km
M 4.7 mlJuly 29, 2021
128 km SSE of Chignik, Alaska · depth 26 km
M 4.6 mlJuly 29, 2021
155 km SSE of Chignik, Alaska · depth 19 km
M 4.5 mlJuly 29, 2021
154 km SE of Perryville, Alaska · depth 12 km
M 4.8 mlJuly 29, 2021
135 km SE of Perryville, Alaska · depth 26 km
M 4.5 mlJuly 29, 2021
142 km SE of Perryville, Alaska · depth 25 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.