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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 4.5 mbAugust 2, 1991
9 km SE of Port Lions, Alaska · depth 45 km
M 5.9 mwJuly 20, 1991
69 km SE of King Cove, Alaska · depth 33 km
M 5.6 mwJune 24, 1991
34 km WNW of Elfin Cove, Alaska · depth 0 km
M 4.8 mbJune 20, 1991
111 km SSW of Sand Point, Alaska · depth 33 km
M 4.9 mbJune 13, 1991
12 km WNW of Anchor Point, Alaska · depth 34 km
M 5.3 mbJune 1, 1991
80 km SE of King Cove, Alaska · depth 33 km
M 4.7 mbMay 31, 1991
237 km SSE of Cordova, Alaska · depth 10 km
M 5.1 mbMay 30, 1991
69 km SE of King Cove, Alaska · depth 33 km
M 4.9 mbMay 30, 1991
107 km SE of King Cove, Alaska · depth 33 km
M 5.6 mbMay 30, 1991
62 km SSE of King Cove, Alaska · depth 33 km
M 7.0 mwMay 30, 1991
71 km SE of King Cove, Alaska · depth 28 km
M 4.9 mbMay 29, 1991
26 km W of Nikolski, Alaska · depth 72 km
M 4.9 mbMay 29, 1991
92 km SSW of Nikolski, Alaska · depth 33 km
M 4.7 mbMay 28, 1991
113 km ESE of Akutan, Alaska · depth 33 km
M 5.0 mbMay 6, 1991
137 km SE of Akutan, Alaska · depth 33 km
M 4.7 mbMay 3, 1991
87 km ESE of Akutan, Alaska · depth 33 km
M 4.9 mbMay 2, 1991
73 km SSE of Akutan, Alaska · depth 33 km
M 6.3 mwMay 1, 1991
Central Alaska · depth 115 km
M 5.2 mwApril 26, 1991
14 km WNW of Anchorage, Alaska · depth 38 km
M 5.1 mbApril 19, 1991
48 km ENE of Pedro Bay, Alaska · depth 134 km
M 4.9 mbApril 15, 1991
118 km SE of Akutan, Alaska · depth 33 km
M 5.2 mwApril 11, 1991
136 km S of False Pass, Alaska · depth 14 km
M 4.6 mbApril 9, 1991
96 km SSW of Nikolski, Alaska · depth 33 km
M 4.7 mbApril 8, 1991
98 km SW of Nikolski, Alaska · depth 33 km
M 4.6 mbMarch 29, 1991
53 km SSE of Old Harbor, Alaska · depth 0 km
M 4.5 mbMarch 24, 1991
73 km SSW of Unalaska, Alaska · depth 79 km
M 5.0 mbMarch 21, 1991
215 km SSE of Akhiok, Alaska · depth 33 km
M 5.1 mwMarch 21, 1991
49 km NE of Chase, Alaska · depth 77 km
M 4.9 mbMarch 20, 1991
74 km SE of Perryville, Alaska · depth 40 km
M 4.6 mbMarch 14, 1991
109 km SSE of King Cove, Alaska · depth 33 km
M 4.7 mbMarch 13, 1991
19 km SE of Nikolski, Alaska · depth 33 km
M 4.5 mbFebruary 28, 1991
63 km E of Port Alsworth, Alaska · depth 140 km
M 4.7 mbFebruary 21, 1991
65 km SE of Nikolski, Alaska · depth 33 km
M 4.8 mbFebruary 8, 1991
77 km ESE of Nikolski, Alaska · depth 33 km
M 4.8 mbFebruary 7, 1991
87 km SSW of False Pass, Alaska · depth 33 km
M 5.1 mwFebruary 7, 1991
24 km W of Beaver, Alaska · depth 10 km
M 4.5 mbJanuary 20, 1991
22 km ENE of Beluga, Alaska · depth 53 km
M 4.5 mbJanuary 14, 1991
222 km SW of Yakutat, Alaska · depth 10 km
M 4.5 mlJanuary 11, 1991
42 km SSE of Cantwell, Alaska · depth 75 km
M 5.4 mwJanuary 1, 1991
139 km SSE of Perryville, Alaska · depth 0 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.