Earthquake Risk in Washington
Washington faces seismic risk from the Cascadia Subduction Zone offshore, capable of producing M9+ earthquakes. The Seattle Fault and other crustal faults add risk in the Puget Sound region.
Notable Earthquakes
50
Recorded in or near Washington (since 2004)
Largest Earthquake
M4.8
12 km SE of North Saanich, Canada (Dec 2015)
Most Recent
M3.6
Sep 30, 2004
Notable Earthquakes
Significant earthquakes recorded in or near this state.
| Magnitude | Location | Depth | Date |
|---|---|---|---|
| M4.8 | 12 km SE of North Saanich, Canada | 52.4 km | Dec 30, 2015 |
| M4.7 | 6 km ESE of Lofall, Washington | 62.2 km | Jan 30, 2009 |
| M4.6 | 8 km WSW of Riverside, Washington | 11.2 km | Nov 18, 2011 |
| M4.6 | 2 km S of Roosevelt, Washington | 28.8 km | Jul 12, 2019 |
| M4.5 | 2025 Orcas Island, Washington | 15.8 km | Mar 3, 2025 |
| M4.5 | 27 km NNE of Packwood, Washington | 1.6 km | Oct 8, 2006 |
| M4.3 | Port Townsend, WA | 54.9 km | Oct 9, 2023 |
| M4.3 | 31 km S of Morton, Washington | 4.3 km | Feb 14, 2011 |
| M4.3 | 25 km N of Leavenworth, Washington | 7.5 km | Jun 27, 2013 |
| M4.2 | 15 km ENE of Cle Elum, Washington | 3.6 km | Feb 18, 2015 |
| M4.2 | 30 km S of White Swan, Washington | 2.6 km | Jun 17, 2010 |
| M4.2 | 5 km NE of Mossyrock, Washington | 14.1 km | Nov 16, 2010 |
| M4.2 | 15 km N of Nespelem Community, Washington | 9.1 km | Sep 1, 2015 |
| M4.1 | 11 km NE of Hoodsport, Washington | 15.4 km | Feb 23, 2017 |
| M4.1 | 38 km NE of Amanda Park, Washington | 39.4 km | Nov 19, 2018 |
| M4.0 | 6 km W of Quilcene, Washington | 52.4 km | Dec 24, 2023 |
| M4.0 | 16 km ENE of Packwood, Washington | -1.1 km | Aug 16, 2004 |
| M4.0 | 6 km ENE of Deming, Washington | -0.7 km | Nov 23, 2005 |
| M4.0 | 15 km SSW of Brinnon, Washington | 16.2 km | Sep 17, 2014 |
| M4.0 | 12 km E of Saanichton, Canada | 52.1 km | Sep 26, 2024 |
| M4.0 | 12 km E of North Saanich, Canada | 54.5 km | Dec 27, 2012 |
| M4.0 | 4 km SE of Coupeville, Washington | 58.4 km | Jul 1, 2009 |
| M3.9 | 9 km NNE of Snoqualmie, Washington | 15.9 km | Aug 8, 2023 |
| M3.9 | 37 km NNE of Amboy, Washington | -0.8 km | Oct 1, 2004 |
| M3.9 | 17 km W of Packwood, Washington | -1.0 km | Jun 25, 2004 |
| M3.9 | 14 km SW of Blyn, Washington | 42.4 km | Mar 6, 2025 |
| M3.9 | 37 km SSE of Morton, Washington | 10.2 km | Jan 3, 2018 |
| M3.9 | 3 km NNE of Port Townsend, Washington | 55.9 km | Jul 31, 2008 |
| M3.9 | 3 km NE of North Bend, Washington | 18.8 km | Sep 12, 2015 |
| M3.9 | 21 km W of Brinnon, Washington | 40.6 km | Jul 24, 2011 |
| M3.9 | 7 km NNW of Brinnon, Washington | 52.6 km | Nov 27, 2007 |
| M3.8 | 10 km NE of Cliffdell, Washington | 1.3 km | Mar 29, 2010 |
| M3.8 | 3 km SW of Clear Lake, Washington | -0.4 km | Mar 17, 2004 |
| M3.8 | 2 km WNW of Cherry Grove, Washington | 14.3 km | Aug 3, 2006 |
| M3.8 | 3 km WSW of Skokomish, Washington | 43.8 km | Jun 12, 2021 |
| M3.7 | 7 km WNW of Lofall, Washington | 23.3 km | Sep 8, 2022 |
| M3.7 | 17 km NNW of Sekiu, Washington | 37.9 km | Aug 19, 2025 |
| M3.7 | 12 km ENE of Ganges, Canada | 16.9 km | Dec 17, 2021 |
| M3.7 | 2 km NNW of Quilcene, Washington | 54.9 km | Jun 16, 2017 |
| M3.7 | 11 km SSW of Benton City, Washington | 19.6 km | May 18, 2008 |
| M3.7 | 36 km NNE of Amboy, Washington | -1.5 km | Oct 1, 2004 |
| M3.7 | 37 km NNE of Amboy, Washington | -0.2 km | Oct 2, 2004 |
| M3.7 | 14 km N of Richland, Washington | 1.6 km | Sep 4, 2011 |
| M3.7 | 24 km SSE of Mossyrock, Washington | 13.7 km | Aug 23, 2013 |
| M3.7 | 12 km E of Greenwater, Washington | 9.4 km | Apr 6, 2025 |
| M3.7 | 12 km NNE of Aberdeen Gardens, Washington | 35.2 km | Jul 31, 2016 |
| M3.7 | 16 km SSE of Victoria, Canada | 40.2 km | Feb 14, 2025 |
| M3.7 | 3 km ENE of Amboy, Washington | 6.4 km | Jan 31, 2013 |
| M3.6 | 7 km WNW of Friday Harbor, Washington | 51.7 km | Feb 8, 2011 |
| M3.6 | 37 km NNE of Amboy, Washington | -0.6 km | Sep 30, 2004 |
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