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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 4.5 mbJuly 27, 1999
15 km ESE of Akutan, Alaska · depth 63 km
M 5.3 mwJuly 22, 1999
13 km ESE of Eagle River, Alaska · depth 39 km
M 4.8 mwJuly 3, 1999
19 km W of Point MacKenzie, Alaska · depth 47 km
M 4.6 mbJune 26, 1999
86 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbJune 25, 1999
102 km SSW of False Pass, Alaska · depth 8 km
M 4.5 mbJune 19, 1999
100 km SE of Akutan, Alaska · depth 33 km
M 4.6 mbJune 15, 1999
57 km NE of Ouzinkie, Alaska · depth 3 km
M 4.7 mbJune 10, 1999
29 km WNW of Nelson Lagoon, Alaska · depth 172 km
M 4.7 mbJune 5, 1999
120 km ESE of Akutan, Alaska · depth 33 km
M 4.5 mbJune 5, 1999
128 km ESE of Akutan, Alaska · depth 33 km
M 5.8 mwcJune 4, 1999
116 km ESE of Akutan, Alaska · depth 33 km
M 5.6 mwMay 27, 1999
43 km ESE of Yakutat, Alaska · depth -3 km
M 4.5 mbMay 22, 1999
20 km SSW of Susitna North, Alaska · depth 33 km
M 4.6 mbMay 19, 1999
52 km S of Old Harbor, Alaska · depth 0 km
M 4.6 mbMay 18, 1999
143 km SSE of False Pass, Alaska · depth 29 km
M 4.5 mbMay 17, 1999
15 km ENE of Kaltag, Alaska · depth 10 km
M 5.4 mwcMay 11, 1999
65 km SSE of Akutan, Alaska · depth 51 km
M 4.9 mbMay 8, 1999
156 km SSE of Old Harbor, Alaska · depth 0 km
M 4.6 mbMay 7, 1999
83 km SSE of Old Harbor, Alaska · depth 10 km
M 4.6 mbMay 7, 1999
south of Alaska · depth 10 km
M 4.5 mbMay 7, 1999
122 km SE of Akhiok, Alaska · depth 10 km
M 4.7 mbMay 7, 1999
98 km SSE of Old Harbor, Alaska · depth 10 km
M 6.2 mwMay 7, 1999
129 km SSE of Old Harbor, Alaska · depth 10 km
M 5.0 mwMay 6, 1999
150 km SSE of Old Harbor, Alaska · depth 0 km
M 4.7 mbMay 6, 1999
Kodiak Island region, Alaska · depth 6 km
M 5.7 mwMay 5, 1999
30 km ESE of Port Graham, Alaska · depth 73 km
M 5.0 mwcApril 30, 1999
112 km ESE of Akutan, Alaska · depth 52 km
M 5.3 mwcApril 28, 1999
141 km S of False Pass, Alaska · depth 33 km
M 4.5 mbApril 22, 1999
216 km SE of Perryville, Alaska · depth 21 km
M 5.2 mwApril 18, 1999
17 km WNW of Clam Gulch, Alaska · depth 55 km
M 5.1 mwcApril 13, 1999
127 km S of False Pass, Alaska · depth 33 km
M 4.6 mbMarch 20, 1999
22 km NW of Nikolski, Alaska · depth 82 km
M 4.8 mbMarch 15, 1999
90 km SSW of Sand Point, Alaska · depth 33 km
M 4.8 mbMarch 10, 1999
179 km SSE of Nikolski, Alaska · depth 33 km
M 4.8 mbMarch 5, 1999
93 km SE of Akutan, Alaska · depth 33 km
M 4.5 mlMarch 5, 1999
50 km WSW of False Pass, Alaska · depth 0 km
M 5.1 mbMarch 4, 1999
52 km W of False Pass, Alaska · depth 33 km
M 4.6 mbFebruary 14, 1999
97 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbFebruary 12, 1999
137 km SE of Chignik, Alaska · depth 3 km
M 4.7 mbFebruary 9, 1999
Southern Alaska · depth 137 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.