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 4.8 mbMarch 14, 1984
8 km NNW of Houston, Alaska · depth 67 km
M 4.8 mbMarch 13, 1984
123 km SE of Sand Point, Alaska · depth 33 km
M 4.7 mbMarch 8, 1984
46 km NW of Dutch Harbor, Alaska · depth 138 km
M 4.6 mbMarch 8, 1984
191 km E of Atka, Alaska · depth 33 km
M 4.8 mbMarch 4, 1984
116 km SSE of Perryville, Alaska · depth 33 km
M 4.6 mbFebruary 27, 1984
27 km SSW of Old Harbor, Alaska · depth 33 km
M 4.6 mbFebruary 16, 1984
80 km SE of Akhiok, Alaska · depth 33 km
M 4.9 mbFebruary 13, 1984
140 km S of Akhiok, Alaska · depth 33 km
M 4.8 mbJanuary 30, 1984
129 km S of Akhiok, Alaska · depth 33 km
M 4.7 mbJanuary 28, 1984
129 km S of Akhiok, Alaska · depth 33 km
M 4.6 mbJanuary 27, 1984
78 km WSW of Arctic Village, Alaska · depth 10 km
M 5.3 mwJanuary 23, 1984
64 km NW of Nikolski, Alaska · depth 103 km
M 4.7 mbJanuary 17, 1984
93 km SSW of Nikolski, Alaska · depth 33 km
M 5.3 mbJanuary 15, 1984
98 km SE of Old Harbor, Alaska · depth 33 km
M 4.9 msJanuary 15, 1984
97 km SE of Old Harbor, Alaska · depth 33 km
M 5.1 msJanuary 15, 1984
84 km SE of Old Harbor, Alaska · depth 33 km
M 4.5 mbJanuary 14, 1984
101 km SE of Old Harbor, Alaska · depth 33 km
M 4.8 mbJanuary 14, 1984
46 km ENE of Pedro Bay, Alaska · depth 142 km
M 4.8 mbJanuary 14, 1984
125 km SSE of Nikolski, Alaska · depth 33 km
M 4.8 mlJanuary 4, 1984
7 km WSW of Rampart, Alaska · depth 33 km
M 5.0 mbJanuary 2, 1984
Kodiak Island region, Alaska · depth 33 km
M 5.6 mbDecember 27, 1983
87 km SSW of False Pass, Alaska · depth 53 km
M 5.0 mbDecember 26, 1983
23 km NE of Nelson Lagoon, Alaska · depth 145 km
M 4.5 mbDecember 24, 1983
33 km SE of Skwentna, Alaska · depth 79 km
M 5.3 mbNovember 26, 1983
74 km WSW of Akhiok, Alaska · depth 33 km
M 5.0 mbNovember 24, 1983
97 km SE of Old Harbor, Alaska · depth 33 km
M 5.0 mbNovember 24, 1983
94 km SSE of Old Harbor, Alaska · depth 33 km
M 5.1 mbNovember 24, 1983
99 km SSE of Old Harbor, Alaska · depth 33 km
M 5.3 mbNovember 24, 1983
103 km SE of Old Harbor, Alaska · depth 33 km
M 5.0 mbNovember 24, 1983
113 km SE of Old Harbor, Alaska · depth 33 km
M 4.6 mbNovember 23, 1983
91 km WSW of Nanwalek, Alaska · depth 75 km
M 5.1 mbNovember 20, 1983
99 km SE of Perryville, Alaska · depth 33 km
M 5.0 mbNovember 17, 1983
145 km S of False Pass, Alaska · depth 33 km
M 5.1 mbNovember 11, 1983
130 km WSW of Nikolski, Alaska · depth 59 km
M 4.9 mbNovember 9, 1983
94 km S of Sand Point, Alaska · depth 42 km
M 4.6 mbNovember 6, 1983
122 km WNW of Yakutat, Alaska · depth 15 km
M 4.8 mbNovember 4, 1983
76 km SSE of Nikolski, Alaska · depth 33 km
M 5.3 mbNovember 4, 1983
85 km SSE of Nikolski, Alaska · depth 33 km
M 4.5 mbNovember 3, 1983
127 km S of Unalaska, Alaska · depth 33 km
M 4.5 mlOctober 24, 1983
55 km SSE of Nikolski, Alaska · depth 33 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.