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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 6.6 msApril 12, 1978
94 km SSE of Old Harbor, Alaska · depth 14 km
M 5.6 msApril 11, 1978
148 km S of False Pass, Alaska · depth 33 km
M 4.5 mbApril 9, 1978
29 km WNW of Salamatof, Alaska · depth 101 km
M 5.1 mbMarch 31, 1978
25 km S of Skwentna, Alaska · depth 90 km
M 4.5 mbMarch 31, 1978
56 km WNW of Ninilchik, Alaska · depth 128 km
M 4.7 mbMarch 24, 1978
91 km SSW of Nikolski, Alaska · depth 33 km
M 5.8 msMarch 23, 1978
111 km SSW of Nikolski, Alaska · depth 23 km
M 4.7 mbMarch 22, 1978
32 km E of Koyuk, Alaska · depth 33 km
M 4.9 mbMarch 20, 1978
39 km E of Port Alsworth, Alaska · depth 153 km
M 5.0 mbMarch 16, 1978
72 km SSE of Nikolski, Alaska · depth 33 km
M 4.6 mbMarch 16, 1978
59 km SSE of Nikolski, Alaska · depth 51 km
M 5.5 mbMarch 16, 1978
73 km SSE of Nikolski, Alaska · depth 49 km
M 5.1 mbMarch 16, 1978
76 km SSE of Nikolski, Alaska · depth 38 km
M 4.7 mbMarch 15, 1978
80 km SSE of Nikolski, Alaska · depth 20 km
M 4.5 mbMarch 5, 1978
39 km ENE of Pedro Bay, Alaska · depth 155 km
M 4.6 mbMarch 4, 1978
111 km SSE of Old Harbor, Alaska · depth 20 km
M 4.5 mbMarch 3, 1978
103 km SSE of Old Harbor, Alaska · depth 35 km
M 4.9 mbMarch 2, 1978
12 km NE of Chignik, Alaska · depth 88 km
M 4.6 mbFebruary 16, 1978
155 km ESE of Nikolski, Alaska · depth 33 km
M 4.7 msFebruary 16, 1978
123 km S of Cordova, Alaska · depth 52 km
M 4.9 mbFebruary 13, 1978
21 km ENE of Pedro Bay, Alaska · depth 131 km
M 5.4 mbFebruary 12, 1978
41 km WNW of Nanwalek, Alaska · depth 72 km
M 4.5 mbJanuary 28, 1978
18 km SSE of Clam Gulch, Alaska · depth 77 km
M 4.7 mbJanuary 27, 1978
9 km ENE of Kasilof, Alaska · depth 70 km
M 4.7 mbJanuary 26, 1978
256 km SE of Chignik, Alaska · depth 33 km
M 5.0 mbJanuary 25, 1978
110 km SW of Nikolski, Alaska · depth 21 km
M 4.6 mbJanuary 18, 1978
131 km SW of Nikolski, Alaska · depth 33 km
M 4.7 mbJanuary 15, 1978
172 km SSE of Cordova, Alaska · depth 33 km
M 4.8 mbJanuary 14, 1978
87 km SSW of False Pass, Alaska · depth 40 km
M 4.8 mbJanuary 8, 1978
11 km SSW of Old Harbor, Alaska · depth 26 km
M 4.6 mbJanuary 6, 1978
3 km NE of Sunrise, Alaska · depth 45 km
M 4.9 mbJanuary 5, 1978
102 km S of Akhiok, Alaska · depth 33 km
M 5.0 mbDecember 30, 1977
100 km SSW of Nikolski, Alaska · depth 38 km
M 5.1 mbDecember 27, 1977
40 km ENE of Port Alsworth, Alaska · depth 175 km
M 4.7 mbDecember 18, 1977
61 km E of Chiniak, Alaska · depth 29 km
M 5.5 msDecember 17, 1977
113 km SW of Nikolski, Alaska · depth 40 km
M 5.1 msDecember 17, 1977
115 km SW of Nikolski, Alaska · depth 44 km
M 4.9 mbDecember 16, 1977
36 km E of Pedro Bay, Alaska · depth 118 km
M 4.7 mbDecember 8, 1977
16 km ESE of Seldovia Village, Alaska · depth 65 km
M 4.9 mbNovember 27, 1977
75 km ESE of King Salmon, Alaska · depth 116 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.