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
'00
'10
'20
'30
'40
'50
'60
'70
'80
'90
'00
'10
'20
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 mbMarch 22, 1979
153 km S of False Pass, Alaska · depth 33 km
M 5.4 mbMarch 17, 1979
38 km SSE of Cantwell, Alaska · depth 104 km
M 5.4 mbMarch 2, 1979
106 km NNW of Yakutat, Alaska · depth 2 km
M 5.4 mbMarch 1, 1979
127 km SE of McCarthy, Alaska · depth 11 km
M 4.6 mbMarch 1, 1979
100 km NW of Yakutat, Alaska · depth 13 km
M 7.1 msFebruary 28, 1979
113 km SE of McCarthy, Alaska · depth 15 km
M 4.5 mbFebruary 28, 1979
13 km W of Nikolski, Alaska · depth 79 km
M 4.8 mbFebruary 27, 1979
135 km S of False Pass, Alaska · depth 33 km
M 4.6 mbFebruary 18, 1979
17 km SSW of Sand Point, Alaska · depth 57 km
M 4.9 mbFebruary 17, 1979
24 km NE of Susitna North, Alaska · depth 54 km
M 4.5 mbFebruary 17, 1979
122 km SE of Chignik, Alaska · depth 33 km
M 5.0 mbFebruary 13, 1979
129 km SE of Chignik, Alaska · depth 33 km
M 4.5 mbFebruary 13, 1979
114 km SE of Chignik, Alaska · depth 33 km
M 4.8 mbFebruary 13, 1979
118 km SE of Chignik, Alaska · depth 33 km
M 6.7 msFebruary 13, 1979
121 km SE of Chignik, Alaska · depth 33 km
M 5.1 mbFebruary 12, 1979
116 km SE of Chignik, Alaska · depth 33 km
M 4.8 mbFebruary 9, 1979
49 km WNW of Happy Valley, Alaska · depth 88 km
M 4.8 mbFebruary 1, 1979
68 km WNW of Ninilchik, Alaska · depth 109 km
M 4.7 mbJanuary 31, 1979
139 km ESE of Akutan, Alaska · depth 36 km
M 6.0 msJanuary 27, 1979
75 km ESE of King Cove, Alaska · depth 17 km
M 5.5 mbJanuary 25, 1979
66 km E of Port Alsworth, Alaska · depth 105 km
M 4.6 mbJanuary 18, 1979
54 km ESE of Nikolski, Alaska · depth 33 km
M 5.5 mbJanuary 16, 1979
80 km SE of Nikolski, Alaska · depth 44 km
M 4.8 mbDecember 29, 1978
94 km SSW of Unalaska, Alaska · depth 33 km
M 4.7 mbDecember 27, 1978
87 km SE of False Pass, Alaska · depth 37 km
M 5.0 mbDecember 24, 1978
99 km NW of Takotna, Alaska · depth 33 km
M 4.5 mbDecember 22, 1978
27 km NNE of Sand Point, Alaska · depth 12 km
M 4.8 mbDecember 17, 1978
61 km SW of Harding-Birch Lakes, Alaska · depth 22 km
M 4.9 mbDecember 14, 1978
99 km SSW of Nikolski, Alaska · depth 37 km
M 4.6 mbDecember 7, 1978
60 km NNE of Akutan, Alaska · depth 127 km
M 4.5 mbDecember 6, 1978
59 km E of Port Alsworth, Alaska · depth 137 km
M 4.7 mbDecember 3, 1978
16 km NNE of Susitna North, Alaska · depth 74 km
M 5.2 mbNovember 28, 1978
132 km SW of Nikolski, Alaska · depth 11 km
M 4.5 mbNovember 24, 1978
35 km SSW of Trapper Creek, Alaska · depth 74 km
M 4.6 mbNovember 18, 1978
25 km WNW of Nelson Lagoon, Alaska · depth 182 km
M 4.7 mbNovember 10, 1978
210 km ENE of Chiniak, Alaska · depth 33 km
M 4.7 mbNovember 10, 1978
59 km SE of Unalaska, Alaska · depth 33 km
M 4.7 mbNovember 2, 1978
195 km SSE of King Cove, Alaska · depth 33 km
M 4.6 mbNovember 2, 1978
86 km ESE of Akutan, Alaska · depth 27 km
M 4.9 mbOctober 25, 1978
94 km S of Chenega, Alaska · depth 19 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.