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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 mbJanuary 26, 1992
125 km SW of Nikolski, Alaska · depth 33 km
M 4.9 mbJanuary 26, 1992
142 km SE of King Cove, Alaska · depth 33 km
M 4.7 mbJanuary 14, 1992
79 km SW of Nikolski, Alaska · depth 33 km
M 4.7 mbJanuary 14, 1992
62 km SW of Nikolski, Alaska · depth 33 km
M 4.7 mbJanuary 12, 1992
105 km SE of King Cove, Alaska · depth 55 km
M 4.5 mbJanuary 11, 1992
39 km ESE of King Cove, Alaska · depth 33 km
M 4.6 mbJanuary 2, 1992
Alaska Peninsula · depth 33 km
M 5.0 mbDecember 22, 1991
126 km SW of Akhiok, Alaska · depth 15 km
M 4.9 mbDecember 14, 1991
149 km SE of Akhiok, Alaska · depth 10 km
M 5.2 mbDecember 7, 1991
19 km E of Point Possession, Alaska · depth 59 km
M 4.5 mbNovember 25, 1991
140 km WSW of Nikolski, Alaska · depth 73 km
M 4.6 mbNovember 9, 1991
95 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbNovember 8, 1991
34 km W of Nikiski, Alaska · depth 84 km
M 4.8 mbOctober 28, 1991
106 km SE of Akutan, Alaska · depth 33 km
M 4.5 mbOctober 20, 1991
45 km WSW of Unalaska, Alaska · depth 33 km
M 5.4 mwOctober 20, 1991
26 km WSW of Dutch Harbor, Alaska · depth 33 km
M 4.6 mbOctober 20, 1991
Fox Islands, Aleutian Islands, Alaska · depth 33 km
M 4.6 mbOctober 19, 1991
41 km SW of Unalaska, Alaska · depth 33 km
M 4.9 mbOctober 19, 1991
36 km W of Dutch Harbor, Alaska · depth 33 km
M 5.4 mwOctober 19, 1991
48 km WSW of Unalaska, Alaska · depth 33 km
M 5.0 mbOctober 19, 1991
44 km WSW of Unalaska, Alaska · depth 33 km
M 4.6 mbOctober 10, 1991
67 km WSW of Nanwalek, Alaska · depth 79 km
M 4.9 mbOctober 9, 1991
31 km ESE of Unalaska, Alaska · depth 33 km
M 5.3 mwOctober 9, 1991
57 km SE of Unalaska, Alaska · depth 33 km
M 4.7 mbOctober 5, 1991
90 km SW of False Pass, Alaska · depth 33 km
M 5.3 mbOctober 5, 1991
91 km SSW of Nikolski, Alaska · depth 33 km
M 4.8 mbOctober 2, 1991
32 km SW of Cantwell, Alaska · depth 14 km
M 5.0 mbSeptember 24, 1991
98 km E of Akutan, Alaska · depth 33 km
M 4.5 mlSeptember 14, 1991
147 km SSE of Alcan Border, Alaska · depth 10 km
M 4.6 mbSeptember 10, 1991
33 km S of Larsen Bay, Alaska · depth 46 km
M 4.6 mbSeptember 7, 1991
172 km S of False Pass, Alaska · depth 33 km
M 4.6 mbSeptember 6, 1991
25 km SW of False Pass, Alaska · depth 33 km
M 4.7 mbSeptember 5, 1991
99 km SSW of Nikolski, Alaska · depth 33 km
M 4.7 mbAugust 21, 1991
143 km ESE of Akutan, Alaska · depth 33 km
M 4.8 mbAugust 16, 1991
171 km WSW of Nikolski, Alaska · depth 52 km
M 5.6 mwAugust 15, 1991
130 km W of Nikolski, Alaska · depth 105 km
M 6.0 mwAugust 14, 1991
163 km N of Nikolski, Alaska · depth 275 km
M 4.9 mbAugust 14, 1991
72 km S of Sand Point, Alaska · depth 33 km
M 4.5 mbAugust 5, 1991
194 km SE of Akutan, Alaska · depth 33 km
M 4.7 mbAugust 2, 1991
66 km ENE of Chignik, Alaska · depth 51 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.