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Home / Earthquakes / Idaho

Idaho Earthquake History

Since November 11, 1905, the USGS has recorded 47 earthquakes of magnitude 4.5 or greater in Idaho, 2 of them magnitude 6 or above. The strongest was M 6.9.

By decade

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Strongest in Idaho

M 6.9 · The 1983 Borah Peak Earthquake, IdahoOctober 28, 1983M 6.5 · Stanley, IdahoMarch 31, 2020M 5.6 · 18 km ESE of Challis, IdahoAugust 22, 1984M 5.5 · 22 km E of Clayton, IdahoOctober 29, 1983M 5.5 · Near Shoshone, IdahoNovember 11, 1905M 5.4 · 23 km E of Clayton, IdahoOctober 29, 1983M 5.4 · 15 km S of Oakley, IdahoNovember 19, 1937M 5.4 · 29 km NW of Mackay, IdahoOctober 28, 1983M 5.3 · Southeastern IdahoDecember 12, 1917M 5.3 · Western IdahoMay 13, 1916

All recorded earthquakes

M 4.9 mbSeptember 11, 1963
19 km WSW of Clayton, Idaho · depth 8 km
M 4.8 lgJanuary 27, 1963
12 km SW of Clayton, Idaho · depth 11 km
M 4.7 mlSeptember 25, 1947
29 km NE of Lowman, Idaho
M 5.4 mlNovember 19, 1937
15 km S of Oakley, Idaho
M 5.3 ukDecember 12, 1917
Southeastern Idaho
M 5.3 ukMay 13, 1916
Western Idaho
M 5.5 mfaNovember 11, 1905
Near Shoshone, Idaho

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.