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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

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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 4.5 mbAugust 19, 1998
103 km ESE of Nikolski, Alaska · depth 33 km
M 4.7 mbAugust 18, 1998
35 km E of Knik River, Alaska · depth 12 km
M 4.6 mbAugust 17, 1998
22 km WNW of Old Harbor, Alaska · depth 33 km
M 4.5 mbAugust 12, 1998
224 km SE of Akutan, Alaska · depth 30 km
M 4.6 mbAugust 4, 1998
30 km SE of Skwentna, Alaska · depth 65 km
M 5.0 mwcAugust 3, 1998
88 km SSE of False Pass, Alaska · depth 56 km
M 4.5 mbJuly 16, 1998
213 km SE of Akutan, Alaska · depth 33 km
M 4.5 mbJuly 15, 1998
30 km W of Nanwalek, Alaska · depth 69 km
M 4.7 mbJuly 10, 1998
83 km SW of Nikolski, Alaska · depth 33 km
M 6.1 mwJuly 9, 1998
73 km WNW of Ninilchik, Alaska · depth 131 km
M 4.8 mbJuly 5, 1998
128 km WSW of Nikolski, Alaska · depth 33 km
M 5.4 mwcJuly 2, 1998
120 km SSW of Nikolski, Alaska · depth 33 km
M 4.7 mbJune 30, 1998
6 km SW of Sand Point, Alaska · depth 59 km
M 4.5 mbJune 26, 1998
3 km WNW of Nikolski, Alaska · depth 63 km
M 4.7 mbJune 12, 1998
34 km W of Happy Valley, Alaska · depth 95 km
M 4.6 mbJune 10, 1998
102 km NNE of Akutan, Alaska · depth 172 km
M 4.8 mbMay 28, 1998
94 km SE of Akutan, Alaska · depth 33 km
M 4.8 mbMay 28, 1998
83 km S of Unalaska, Alaska · depth 33 km
M 4.7 mbMay 20, 1998
153 km SW of Nikolski, Alaska · depth 33 km
M 5.3 mwcMay 20, 1998
153 km SW of Nikolski, Alaska · depth 33 km
M 4.6 mbMay 18, 1998
48 km SE of Egegik, Alaska · depth -3 km
M 4.6 mbMay 18, 1998
172 km SSE of Unalaska, Alaska · depth 33 km
M 4.6 mbMay 11, 1998
46 km SE of Egegik, Alaska · depth -3 km
M 4.6 mbMay 10, 1998
86 km SSW of Sand Point, Alaska · depth 10 km
M 4.7 mbMay 9, 1998
45 km SE of Egegik, Alaska · depth -3 km
M 4.9 mbMay 9, 1998
36 km SE of Egegik, Alaska · depth -3 km
M 5.4 mwMay 9, 1998
35 km SE of Egegik, Alaska · depth -3 km
M 5.2 mwMay 9, 1998
67 km ESE of Egegik, Alaska · depth -3 km
M 5.4 mwMay 9, 1998
48 km SE of Egegik, Alaska · depth -3 km
M 4.7 mbMay 1, 1998
82 km SSE of Akutan, Alaska · depth 33 km
M 4.5 mbApril 29, 1998
32 km NNE of Chitina, Alaska · depth 33 km
M 5.0 mbApril 27, 1998
207 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbApril 19, 1998
12 km SSE of Akhiok, Alaska · depth 10 km
M 4.5 mbApril 12, 1998
60 km ESE of Nikolski, Alaska · depth 33 km
M 4.8 mbApril 4, 1998
272 km SE of Atka, Alaska · depth 33 km
M 4.6 mbMarch 31, 1998
103 km SSW of Unalaska, Alaska · depth 33 km
M 4.7 mbFebruary 25, 1998
88 km SSW of Nikolski, Alaska · depth 33 km
M 5.3 mwcFebruary 22, 1998
55 km SE of Nikolski, Alaska · depth 33 km
M 4.9 mbFebruary 20, 1998
80 km E of Nikolski, Alaska · depth 33 km
M 4.6 mbFebruary 14, 1998
65 km N of Petersville, Alaska · depth 129 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.