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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 4.7 mbJuly 29, 2021
197 km SSW of Akhiok, Alaska · depth 10 km
M 4.8 mbJuly 29, 2021
158 km SE of Perryville, Alaska · depth 34 km
M 4.5 mlJuly 29, 2021
136 km SE of Perryville, Alaska · depth 25 km
M 5.4 mlJuly 29, 2021
154 km SE of Chignik, Alaska · depth 3 km
M 5.3 mbJuly 29, 2021
128 km SE of Perryville, Alaska · depth 35 km
M 4.5 mlJuly 29, 2021
106 km SSE of Chignik, Alaska · depth 9 km
M 5.9 mlJuly 29, 2021
127 km SE of Chignik, Alaska · depth 1 km
M 5.7 mbJuly 29, 2021
99 km ESE of Chignik, Alaska · depth 35 km
M 5.1 mlJuly 29, 2021
114 km SE of Perryville, Alaska · depth 35 km
M 5.5 mlJuly 29, 2021
106 km SSE of Perryville, Alaska · depth 18 km
M 8.2 mwwJuly 29, 2021
2021 Chignik, Alaska Earthquake · depth 35 km
M 4.8 mlJuly 23, 2021
11 km NW of Harding-Birch Lakes, Alaska · depth 10 km
M 4.7 mwrJuly 3, 2021
81 km SSW of Unalaska, Alaska · depth 47 km
M 5.4 mwwJune 18, 2021
219 km S of Sand Point, Alaska · depth 8 km
M 5.0 mbJune 14, 2021
214 km SSE of Sand Point, Alaska · depth 10 km
M 4.6 mlMay 31, 2021
75 km N of Chickaloon, Alaska · depth 44 km
M 6.1 mwwMay 31, 2021
73 km N of Chickaloon, Alaska · depth 44 km
M 4.5 mbMay 18, 2021
226 km SE of Chiniak, Alaska · depth 10 km
M 4.9 mwwMay 9, 2021
126 km E of McCarthy, Alaska · depth 5 km
M 4.9 mbMay 4, 2021
128 km WSW of Nikolski, Alaska · depth 54 km
M 4.7 mlMay 1, 2021
93 km W of Elfin Cove, Alaska · depth 9 km
M 4.8 mlApril 27, 2021
Southern Alaska · depth 44 km
M 5.5 mwwApril 8, 2021
28 km SE of Cantwell, Alaska · depth 80 km
M 4.8 mbApril 7, 2021
49 km SSW of Nikolski, Alaska · depth 42 km
M 4.8 mbMarch 26, 2021
72 km WSW of Nikolski, Alaska · depth 12 km
M 4.6 mwrMarch 18, 2021
32 km S of Sand Point, Alaska · depth 50 km
M 4.5 mlMarch 3, 2021
57 km NW of Beluga, Alaska · depth 99 km
M 5.3 mwwFebruary 27, 2021
5 km SSE of Point MacKenzie, Alaska · depth 46 km
M 5.3 mwwFebruary 27, 2021
5 km SSE of Point MacKenzie, Alaska · depth 46 km
M 5.3 mwwFebruary 13, 2021
57 km WNW of Akhiok, Alaska · depth 50 km
M 4.8 mbFebruary 6, 2021
75 km ESE of King Cove, Alaska · depth 51 km
M 4.9 mlJanuary 25, 2021
36 km SSW of Cordova, Alaska · depth 2 km
M 5.0 mwwJanuary 24, 2021
71 km S of King Cove, Alaska · depth 39 km
M 5.1 mwwJanuary 11, 2021
Unimak Island region, Alaska · depth 35 km
M 4.9 mlJanuary 3, 2021
11 km NNE of Larsen Bay, Alaska · depth 60 km
M 4.5 mwrDecember 30, 2020
90 km SE of Sand Point, Alaska · depth 27 km
M 4.5 mbDecember 29, 2020
245 km SE of Chiniak, Alaska · depth 10 km
M 4.9 mbDecember 23, 2020
south of Alaska · depth 10 km
M 5.0 mwwDecember 19, 2020
89 km SSE of Sand Point, Alaska · depth 33 km
M 5.3 mwwDecember 16, 2020
203 km S of Sand Point, 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.