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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 4.5 mbJune 25, 2020
184 km E of Atka, Alaska · depth 57 km
M 4.5 mbJune 15, 2020
23 km W of Dutch Harbor, Alaska · depth 11 km
M 4.8 mbJune 13, 2020
208 km S of Unalaska, Alaska · depth 14 km
M 4.7 mbJune 9, 2020
117 km SE of King Cove, Alaska · depth 33 km
M 4.5 mlJune 5, 2020
104 km SSE of Akhiok, Alaska · depth 25 km
M 4.7 mlMay 20, 2020
208 km SE of Perryville, Alaska · depth 9 km
M 4.8 mbMay 17, 2020
98 km SSW of Nikolski, Alaska · depth 10 km
M 4.5 mbMay 16, 2020
90 km SSW of Nikolski, Alaska · depth 10 km
M 4.5 mbMay 16, 2020
82 km SSW of Nikolski, Alaska · depth 35 km
M 4.9 mbMay 9, 2020
58 km S of False Pass, Alaska · depth 68 km
M 4.5 mbMay 2, 2020
55 km SW of Nelson Lagoon, Alaska · depth 165 km
M 4.6 mbApril 20, 2020
55 km WSW of Nikolski, Alaska · depth 10 km
M 5.2 mwwApril 17, 2020
120 km SSE of Akhiok, Alaska · depth 7 km
M 4.8 mwwMarch 30, 2020
35 km SE of Unalaska, Alaska · depth 87 km
M 5.2 mwwMarch 20, 2020
250 km ESE of Chiniak, Alaska · depth 10 km
M 5.0 mlMarch 18, 2020
67 km S of Shungnak, Alaska · depth 9 km
M 4.7 mbMarch 1, 2020
105 km WNW of Nikolski, Alaska · depth 153 km
M 4.5 mbMarch 1, 2020
21 km E of False Pass, Alaska · depth 98 km
M 4.9 mlFebruary 17, 2020
79 km E of Ugashik, Alaska · depth 101 km
M 4.5 mlFebruary 12, 2020
71 km SSE of Kokhanok, Alaska · depth 118 km
M 5.1 mwwJanuary 31, 2020
270 km SE of Chiniak, Alaska · depth 10 km
M 5.0 mwwJanuary 13, 2020
66 km NW of Nikolski, Alaska · depth 104 km
M 5.0 mwwJanuary 2, 2020
217 km SSE of Old Harbor, Alaska · depth 13 km
M 4.7 mlDecember 21, 2019
116 km SE of Old Harbor, Alaska · depth 2 km
M 4.6 mlDecember 21, 2019
117 km SE of Old Harbor, Alaska · depth 8 km
M 5.1 mwwDecember 18, 2019
87 km WNW of Elfin Cove, Alaska · depth 2 km
M 4.6 mwwDecember 2, 2019
239 km SE of Chiniak, Alaska · depth 10 km
M 4.5 mlDecember 1, 2019
56 km WNW of Nanwalek, Alaska · depth 88 km
M 4.6 mlNovember 19, 2019
195 km SE of Chignik, Alaska · depth 20 km
M 4.7 mlNovember 9, 2019
88 km NW of Alatna, Alaska · depth 4 km
M 5.0 mlNovember 7, 2019
127 km SE of Perryville, Alaska · depth 10 km
M 4.5 mlOctober 27, 2019
65 km SSE of Cantwell, Alaska · depth 75 km
M 5.8 mwwOctober 26, 2019
111 km SW of Nikolski, Alaska · depth 35 km
M 5.2 mwrOctober 18, 2019
61 km S of Shungnak, Alaska · depth 6 km
M 5.4 mwwOctober 18, 2019
66 km S of Shungnak, Alaska · depth 6 km
M 5.0 mwwOctober 12, 2019
273 km SE of Chiniak, Alaska · depth 10 km
M 5.0 mwwOctober 4, 2019
41 km W of Petersville, Alaska · depth 93 km
M 4.8 mwrSeptember 27, 2019
61 km SE of Unalaska, Alaska · depth 35 km
M 5.3 mwwSeptember 23, 2019
139 km ESE of Nikolski, Alaska · depth 10 km
M 5.2 mwwSeptember 17, 2019
28 km NW of Susitna, Alaska · depth 63 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.