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Washington Earthquake History
Since March 14, 1903, the USGS has recorded 144 earthquakes of magnitude 4.5 or greater in Washington, 5 of them magnitude 6 or above. The strongest was M 6.8.
By decade
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Strongest in Washington
M 6.8 · 7 km SSE of Longbranch, WashingtonFebruary 28, 2001M 6.7 · 1 km ENE of Dash Point, WashingtonApril 29, 1965M 6.7 · 4 km WNW of Roy, WashingtonApril 13, 1949M 6.1 · Puget Sound region, WashingtonNovember 13, 1939M 6.0 · San Juan Islands, WashingtonJanuary 11, 1909M 6.0 · 3 km SW of Garrett, WashingtonJuly 16, 1936M 5.8 · 8 km N of Satsop, WashingtonJuly 3, 1999M 5.7 · 38 km NNE of Amboy, WashingtonMay 18, 1980M 5.6 · Near Marblemount, WashingtonAugust 18, 1915M 5.5 · 21 km SSE of Point Roberts, WashingtonJanuary 24, 1920
All recorded earthquakes
M 4.5 mdJanuary 24, 1963
2 km N of West Lake Sammamish, Washington · depth 17 km
M 4.7 mdDecember 31, 1962
3 km E of Wilkeson, Washington · depth 33 km
M 4.5 mdNovember 7, 1961
7 km N of Fern Prairie, Washington · depth 33 km
M 5.1 mlSeptember 17, 1961
28 km ENE of Amboy, Washington · depth 7 km
M 4.8 mlSeptember 16, 1961
26 km NE of Yacolt, Washington · depth 7 km
M 4.6 mdSeptember 10, 1960
2 km SSE of Bangor Trident Base, Washington · depth 25 km
M 4.8 mlNovember 23, 1959
9 km NW of Packwood, Washington
M 4.7 mlAugust 4, 1959
11 km ENE of Fern Prairie, Washington
M 5.0 mlJanuary 26, 1957
6 km W of Conway, Washington
M 5.0 mlMay 15, 1954
4 km ENE of Machias, Washington
M 6.7 mwApril 13, 1949
4 km WNW of Roy, Washington · depth 50 km
M 4.8 mlNovember 29, 1943
17 km SSE of Friday Harbor, Washington
M 4.5 mlApril 7, 1941
6 km S of Okanogan, Washington
M 5.1 mlOctober 27, 1940
Olympic Peninsula, Washington
M 6.1 mwNovember 13, 1939
Puget Sound region, Washington · depth 55 km
M 6.0 mwJuly 16, 1936
3 km SW of Garrett, Washington · depth 10 km
M 5.2 mlJuly 18, 1932
9 km NE of Lake Marcel-Stillwater, Washington
M 4.8 mlDecember 31, 1931
Olympic Peninsula, Washington
M 5.5 mlJanuary 24, 1920
21 km SSE of Point Roberts, Washington
M 5.6 mlAugust 18, 1915
Near Marblemount, Washington
M 4.7 mintDecember 25, 1913
Near Edmonds, Washington
M 6.0 mlJanuary 11, 1909
San Juan Islands, Washington
M 5.3 mfaMarch 17, 1904
Eastern Olympic Peninsula, Washington
M 4.9 mfaMarch 14, 1903
Near Kirkland, Washington
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.