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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 5.3 mwJuly 1, 1988
106 km S of Unalaska, Alaska · depth 33 km
M 5.0 mbJune 22, 1988
110 km SSE of King Cove, Alaska · depth 33 km
M 4.7 mbJune 12, 1988
147 km S of Akhiok, Alaska · depth 33 km
M 4.9 mbJune 12, 1988
166 km S of Nikolski, Alaska · depth 33 km
M 5.2 mwJune 6, 1988
98 km WSW of Covenant Life, Alaska · depth 10 km
M 5.1 mbJune 3, 1988
103 km W of Nikolski, Alaska · depth 165 km
M 4.9 mbJune 2, 1988
142 km SW of Nikolski, Alaska · depth 33 km
M 4.6 mdMay 29, 1988
41 km ENE of Port Alsworth, Alaska · depth 205 km
M 4.5 mbMay 22, 1988
158 km S of False Pass, Alaska · depth 33 km
M 4.5 mbMay 22, 1988
143 km S of False Pass, Alaska · depth 33 km
M 6.0 mwMay 22, 1988
137 km S of False Pass, Alaska · depth 33 km
M 4.5 mbMay 21, 1988
56 km N of Petersville, Alaska · depth 118 km
M 4.8 mbMay 12, 1988
18 km SSE of Sand Point, Alaska · depth 24 km
M 4.6 mbMay 10, 1988
Gulf of Alaska · depth 10 km
M 5.8 mwApril 26, 1988
296 km SW of Yakutat, Alaska · depth 10 km
M 5.2 mbApril 19, 1988
Alaska Peninsula · depth 77 km
M 4.9 mbApril 13, 1988
161 km W of Nikolski, Alaska · depth 127 km
M 5.2 mbApril 13, 1988
Gulf of Alaska · depth 10 km
M 4.5 mbApril 10, 1988
41 km WSW of Unalaska, Alaska · depth 33 km
M 4.7 mbApril 2, 1988
131 km S of False Pass, Alaska · depth 33 km
M 4.9 mbMarch 31, 1988
15 km ENE of Nikolski, Alaska · depth 33 km
M 5.0 mbMarch 29, 1988
75 km S of False Pass, Alaska · depth 33 km
M 4.5 mbMarch 29, 1988
66 km SE of Nikolski, Alaska · depth 33 km
M 5.8 mwMarch 29, 1988
86 km SSE of Nikolski, Alaska · depth 33 km
M 5.0 mbMarch 29, 1988
Gulf of Alaska · depth 10 km
M 4.5 mbMarch 28, 1988
32 km S of Akutan, Alaska · depth 33 km
M 4.7 mbMarch 28, 1988
56 km S of Akutan, Alaska · depth 33 km
M 4.8 mbMarch 26, 1988
291 km SW of Yakutat, Alaska · depth 10 km
M 5.4 mbMarch 25, 1988
75 km SSE of Sand Point, Alaska · depth 33 km
M 5.6 mwMarch 23, 1988
56 km SW of Nikolski, Alaska · depth 33 km
M 4.7 msMarch 21, 1988
Gulf of Alaska · depth 10 km
M 5.1 mwMarch 15, 1988
Gulf of Alaska · depth 10 km
M 4.7 mbMarch 11, 1988
Gulf of Alaska · depth 10 km
M 4.6 mbMarch 10, 1988
Gulf of Alaska · depth 10 km
M 5.3 mwMarch 10, 1988
180 km SSE of Cordova, Alaska · depth 10 km
M 4.5 mbMarch 6, 1988
Gulf of Alaska · depth 10 km
M 6.2 mbMarch 6, 1988
290 km SW of Yakutat, Alaska · depth 10 km
M 5.1 mbMarch 6, 1988
Gulf of Alaska · depth 10 km
M 7.8 mwMarch 6, 1988
Gulf of Alaska · depth 10 km
M 4.8 mbMarch 4, 1988
213 km SW of Yakutat, 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.