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Home / Earthquakes / Alaska

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 5.6 mwwJuly 18, 2018
103 km S of Sand Point, Alaska · depth 30 km
M 4.7 mbJuly 13, 2018
247 km SE of Chiniak, Alaska · depth 10 km
M 5.0 mwJuly 10, 2018
54 km N of Petersville, Alaska · depth 113 km
M 4.6 mbJuly 9, 2018
135 km S of Unalaska, Alaska · depth 32 km
M 4.6 mlJuly 3, 2018
42 km ENE of Port Heiden, Alaska · depth 6 km
M 4.6 mbJuly 2, 2018
26 km ENE of False Pass, Alaska · depth 117 km
M 5.0 mwJuly 1, 2018
63 km N of Petersville, Alaska · depth 117 km
M 4.8 mbJune 17, 2018
224 km SE of Chiniak, Alaska · depth 10 km
M 5.5 mwwMay 27, 2018
160 km ESE of Akutan, Alaska · depth 17 km
M 5.3 mwMay 11, 2018
69 km W of Karluk, Alaska · depth 63 km
M 5.5 mwwMay 8, 2018
276 km ESE of Chiniak, Alaska · depth 6 km
M 4.6 mbMay 4, 2018
37 km SW of Sand Point, Alaska · depth 65 km
M 4.5 mbMay 1, 2018
265 km SE of Chiniak, Alaska · depth 22 km
M 4.5 mbApril 26, 2018
96 km SSE of Akutan, Alaska · depth 32 km
M 4.6 mbApril 19, 2018
170 km S of False Pass, Alaska · depth 20 km
M 4.6 mbApril 16, 2018
155 km S of False Pass, Alaska · depth 10 km
M 4.6 mbApril 15, 2018
229 km SE of Chiniak, Alaska · depth 28 km
M 4.9 mbApril 14, 2018
112 km SSW of Sand Point, Alaska · depth 34 km
M 5.2 mwwApril 7, 2018
228 km SE of Chiniak, Alaska · depth 5 km
M 4.5 mbMarch 31, 2018
221 km SE of Chiniak, Alaska · depth 14 km
M 4.6 mbMarch 29, 2018
257 km ESE of Chiniak, Alaska · depth 10 km
M 5.4 mwwMarch 27, 2018
252 km ESE of Chiniak, Alaska · depth 6 km
M 4.5 mbMarch 27, 2018
227 km ESE of Chiniak, Alaska · depth 10 km
M 5.1 mwwMarch 26, 2018
272 km ESE of Chiniak, Alaska · depth 10 km
M 4.6 mlMarch 24, 2018
105 km SSE of Akhiok, Alaska · depth 25 km
M 4.5 mbMarch 22, 2018
269 km SE of Chiniak, Alaska · depth 10 km
M 4.6 mbMarch 17, 2018
167 km S of False Pass, Alaska · depth 12 km
M 4.5 mbMarch 13, 2018
229 km SE of Chiniak, Alaska · depth 14 km
M 4.9 mwMarch 9, 2018
55 km E of Pedro Bay, Alaska · depth 100 km
M 4.6 mbMarch 9, 2018
287 km SE of Chiniak, Alaska · depth 6 km
M 5.0 mwwMarch 9, 2018
289 km SE of Chiniak, Alaska · depth 17 km
M 4.9 mbMarch 4, 2018
130 km WSW of Nikolski, Alaska · depth 55 km
M 4.5 mbMarch 4, 2018
231 km SE of Chiniak, Alaska · depth 10 km
M 4.5 mbMarch 3, 2018
102 km SSW of Nikolski, Alaska · depth 10 km
M 4.8 mbFebruary 27, 2018
134 km SE of Akutan, Alaska · depth 9 km
M 4.6 mbFebruary 25, 2018
49 km W of Nelson Lagoon, Alaska · depth 191 km
M 4.9 mwFebruary 23, 2018
43 km SSE of Perryville, Alaska · depth 27 km
M 4.6 mwwFebruary 20, 2018
96 km SE of Akutan, Alaska · depth 34 km
M 4.5 mbFebruary 15, 2018
234 km SE of Chiniak, Alaska · depth 10 km
M 4.5 mbFebruary 9, 2018
231 km SE of Chiniak, Alaska · depth 15 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.