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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

All recorded earthquakes

M 4.8 mbOctober 9, 1985
23 km WNW of Nanwalek, Alaska · depth 98 km
M 4.9 mbOctober 8, 1985
130 km SE of Akutan, Alaska · depth 33 km
M 4.9 mbOctober 4, 1985
99 km SSW of Nikolski, Alaska · depth 33 km
M 4.5 mbOctober 4, 1985
88 km SSW of Nikolski, Alaska · depth 33 km
M 4.8 mbOctober 4, 1985
77 km S of Nikolski, Alaska · depth 33 km
M 4.5 mbOctober 2, 1985
93 km NNW of Karluk, Alaska · depth 33 km
M 4.8 mbOctober 2, 1985
65 km S of Nikolski, Alaska · depth 33 km
M 4.9 mbOctober 1, 1985
47 km S of Nikolski, Alaska · depth 33 km
M 5.7 mwOctober 1, 1985
71 km S of Nikolski, Alaska · depth 33 km
M 4.7 mbSeptember 30, 1985
77 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbSeptember 25, 1985
17 km ENE of Newhalen, Alaska · depth 189 km
M 4.8 mbSeptember 25, 1985
81 km SE of Sand Point, Alaska · depth 33 km
M 4.9 mbSeptember 23, 1985
85 km SSW of Nikolski, Alaska · depth 33 km
M 4.6 mbSeptember 22, 1985
39 km SE of Port Graham, Alaska · depth 53 km
M 4.5 mbSeptember 15, 1985
102 km NW of Emmonak, Alaska · depth 15 km
M 5.9 msSeptember 15, 1985
41 km SSW of Covenant Life, Alaska · depth 2 km
M 4.9 mbAugust 22, 1985
123 km S of False Pass, Alaska · depth 33 km
M 4.5 mbAugust 18, 1985
Fox Islands, Aleutian Islands, Alaska · depth 33 km
M 4.7 mbAugust 12, 1985
152 km SSE of Nikolski, Alaska · depth 33 km
M 4.8 mbAugust 7, 1985
78 km SE of Akutan, Alaska · depth 33 km
M 4.6 mbJuly 28, 1985
95 km S of Unalaska, Alaska · depth 33 km
M 5.1 mbJuly 26, 1985
122 km S of Unalaska, Alaska · depth 33 km
M 4.6 mbJuly 25, 1985
114 km S of Unalaska, Alaska · depth 33 km
M 4.5 mbJuly 16, 1985
88 km ESE of Akutan, Alaska · depth 33 km
M 4.7 mbJuly 12, 1985
92 km SE of Akutan, Alaska · depth 33 km
M 4.6 mbJuly 11, 1985
Fox Islands, Aleutian Islands, Alaska · depth 33 km
M 5.6 mwJune 29, 1985
70 km NW of Nikolski, Alaska · depth 33 km
M 4.7 mbJune 27, 1985
65 km SSE of Ugashik, Alaska · depth 97 km
M 4.8 mbJune 27, 1985
60 km WSW of Ferry, Alaska · depth 143 km
M 4.7 mbJune 26, 1985
40 km S of Sand Point, Alaska · depth 55 km
M 4.6 mbJune 20, 1985
40 km WSW of Healy, Alaska · depth 120 km
M 4.9 mbJune 13, 1985
10 km SSW of McKinley Park, Alaska · depth 33 km
M 4.5 mbJune 9, 1985
137 km WSW of Nikolski, Alaska · depth 79 km
M 4.5 mbJune 9, 1985
51 km WNW of Happy Valley, Alaska · depth 98 km
M 4.5 mbJune 7, 1985
77 km WSW of Karluk, Alaska · depth 64 km
M 4.6 mbMay 24, 1985
40 km SSW of Unalaska, Alaska · depth 100 km
M 5.1 mbMay 21, 1985
Fox Islands, Aleutian Islands, Alaska · depth 71 km
M 4.8 mbMay 21, 1985
24 km S of Sand Point, Alaska · depth 59 km
M 4.7 mbMay 17, 1985
63 km SE of Unalaska, Alaska · depth 33 km
M 4.6 mbMay 15, 1985
16 km E of King Cove, Alaska · depth 68 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.