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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 mbApril 9, 1987
60 km S of Nikolski, Alaska · depth 33 km
M 4.6 mbApril 7, 1987
69 km SW of Unalaska, Alaska · depth 33 km
M 4.8 mbApril 2, 1987
46 km ESE of Nikolski, Alaska · depth 33 km
M 4.8 mbMarch 28, 1987
203 km S of Nikolski, Alaska · depth 33 km
M 4.6 mbMarch 24, 1987
27 km N of Nelson Lagoon, Alaska · depth 162 km
M 4.7 mbMarch 23, 1987
194 km E of Atka, Alaska · depth 33 km
M 5.4 mwMarch 22, 1987
188 km E of Atka, Alaska · depth 33 km
M 5.4 mwMarch 16, 1987
74 km SW of Unalaska, Alaska · depth 10 km
M 4.6 mbMarch 13, 1987
85 km SSW of Unalaska, Alaska · depth 10 km
M 4.5 mbMarch 13, 1987
44 km ENE of Akutan, Alaska · depth 33 km
M 4.5 mbMarch 12, 1987
69 km SW of Unalaska, Alaska · depth 10 km
M 4.5 mbMarch 8, 1987
55 km ENE of Akutan, Alaska · depth 84 km
M 4.5 mbMarch 6, 1987
83 km SSW of Unalaska, Alaska · depth 10 km
M 4.6 mbMarch 5, 1987
90 km SSW of Unalaska, Alaska · depth 10 km
M 4.6 mbMarch 5, 1987
80 km SSW of Unalaska, Alaska · depth 10 km
M 4.6 mbMarch 3, 1987
80 km SW of Unalaska, Alaska · depth 10 km
M 4.7 mbMarch 3, 1987
85 km SW of Unalaska, Alaska · depth 10 km
M 4.8 mbMarch 2, 1987
84 km SW of Unalaska, Alaska · depth 10 km
M 4.5 mbMarch 1, 1987
81 km WSW of Unalaska, Alaska · depth 10 km
M 4.5 mbMarch 1, 1987
52 km SW of Unalaska, Alaska · depth 10 km
M 4.8 mbFebruary 28, 1987
211 km SSE of False Pass, Alaska · depth 33 km
M 4.5 mbFebruary 28, 1987
91 km ENE of Nikolski, Alaska · depth 10 km
M 4.6 mlFebruary 28, 1987
36 km SW of Unalaska, Alaska · depth 10 km
M 4.7 mbFebruary 28, 1987
90 km SSW of Unalaska, Alaska · depth 10 km
M 4.5 mbFebruary 27, 1987
52 km WSW of Dutch Harbor, Alaska · depth 10 km
M 4.5 mbFebruary 27, 1987
58 km SW of Unalaska, Alaska · depth 10 km
M 4.5 mbFebruary 27, 1987
64 km SW of Unalaska, Alaska · depth 10 km
M 4.6 mbFebruary 27, 1987
71 km SW of Unalaska, Alaska · depth 10 km
M 4.6 mbFebruary 27, 1987
64 km SW of Unalaska, Alaska · depth 10 km
M 4.5 mbFebruary 27, 1987
95 km SW of Unalaska, Alaska · depth 10 km
M 4.7 mbFebruary 27, 1987
72 km WSW of Unalaska, Alaska · depth 10 km
M 6.9 mwFebruary 27, 1987
67 km SW of Unalaska, Alaska · depth 10 km
M 4.8 mbFebruary 26, 1987
151 km S of False Pass, Alaska · depth 33 km
M 4.6 mbFebruary 25, 1987
79 km S of Old Harbor, Alaska · depth 33 km
M 4.9 mbFebruary 15, 1987
Unimak Island region, Alaska · depth 33 km
M 4.5 mbFebruary 13, 1987
83 km W of Nikolski, Alaska · depth 33 km
M 5.0 mbFebruary 12, 1987
92 km SE of False Pass, Alaska · depth 33 km
M 4.5 mbFebruary 8, 1987
56 km SE of Sand Point, Alaska · depth 33 km
M 4.8 mbFebruary 7, 1987
52 km SE of Nikolski, Alaska · depth 33 km
M 4.7 mbFebruary 4, 1987
24 km S of Port Clarence, Alaska · depth 33 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.