DisasterAtlasUSA

This is a record of past federal disaster declarations, not a forecast. Federal assistance figures are aid obligated under specific programs, not total damages. For current threats, check the National Weather Service and FEMA.

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 6.5 mwSeptember 12, 1986
95 km SSE of Akhiok, Alaska · depth 31 km
M 4.6 mbSeptember 10, 1986
208 km SE of Atka, Alaska · depth 33 km
M 4.5 mbSeptember 3, 1986
60 km SW of Unalaska, Alaska · depth 33 km
M 4.7 mbSeptember 3, 1986
58 km SE of Nikolski, Alaska · depth 33 km
M 4.5 mbAugust 27, 1986
182 km WSW of Yakutat, Alaska · depth 30 km
M 4.5 mbAugust 25, 1986
18 km W of Point MacKenzie, Alaska · depth 47 km
M 4.8 mbAugust 23, 1986
57 km SE of Unalaska, Alaska · depth 33 km
M 4.6 mbAugust 20, 1986
125 km S of False Pass, Alaska · depth 33 km
M 4.6 mbAugust 14, 1986
88 km ESE of Akutan, Alaska · depth 33 km
M 4.7 mbAugust 9, 1986
177 km SSE of King Cove, Alaska · depth 33 km
M 4.5 mbAugust 8, 1986
60 km WSW of Unalaska, Alaska · depth 33 km
M 4.6 mbAugust 5, 1986
105 km S of Unalaska, Alaska · depth 33 km
M 4.5 mbAugust 5, 1986
125 km SE of Akutan, Alaska · depth 33 km
M 4.6 mbAugust 1, 1986
62 km SW of Unalaska, Alaska · depth 33 km
M 4.7 mbJuly 31, 1986
63 km SW of Unalaska, Alaska · depth 33 km
M 5.0 mbJuly 28, 1986
112 km S of Unalaska, Alaska · depth 33 km
M 4.7 mbJuly 26, 1986
79 km SSW of Unalaska, Alaska · depth 33 km
M 4.5 mbJuly 22, 1986
86 km ENE of Nikolski, Alaska · depth 33 km
M 5.0 mbJuly 21, 1986
63 km SE of Akhiok, Alaska · depth 33 km
M 4.7 mbJuly 20, 1986
92 km SE of Chignik, Alaska · depth 33 km
M 4.6 mbJuly 20, 1986
24 km WNW of Akhiok, Alaska · depth 92 km
M 4.5 mbJuly 20, 1986
87 km NNW of Nikolski, Alaska · depth 33 km
M 5.1 mwJuly 20, 1986
Fox Islands, Aleutian Islands, Alaska · depth 33 km
M 6.0 mwJuly 19, 1986
64 km SW of Unalaska, Alaska · depth 33 km
M 4.9 mbJuly 19, 1986
48 km WSW of Unalaska, Alaska · depth 33 km
M 5.0 mbJuly 19, 1986
64 km WSW of Unalaska, Alaska · depth 33 km
M 4.8 mbJuly 19, 1986
62 km SW of Unalaska, Alaska · depth 33 km
M 4.5 mbJuly 19, 1986
63 km SW of Unalaska, Alaska · depth 33 km
M 6.0 mwJuly 19, 1986
51 km SW of Unalaska, Alaska · depth 33 km
M 5.2 mwJuly 19, 1986
74 km SE of Unalaska, Alaska · depth 33 km
M 5.6 mwJuly 19, 1986
72 km SE of Unalaska, Alaska · depth 33 km
M 4.6 mbJuly 19, 1986
57 km WSW of Unalaska, Alaska · depth 33 km
M 4.6 mbJune 29, 1986
93 km SSW of False Pass, Alaska · depth 33 km
M 4.9 mbJune 24, 1986
28 km WNW of Stevens Village, Alaska · depth 10 km
M 4.5 mbJune 22, 1986
160 km SE of Chignik, Alaska · depth 33 km
M 4.9 mbJune 21, 1986
60 km WNW of Anchor Point, Alaska · depth 101 km
M 4.7 mbJune 20, 1986
88 km SSE of Old Harbor, Alaska · depth 33 km
M 4.7 mbJune 19, 1986
96 km SE of Akhiok, Alaska · depth 33 km
M 6.8 mwJune 19, 1986
100 km SSE of Old Harbor, Alaska · depth 17 km
M 4.7 mbJune 13, 1986
92 km E of Akutan, 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.