Washington earthquakes

M2.4 earthquake 3 km ENE of Sedro-Woolley, Washington

A magnitude 2.4 earthquake struck 3 km ENE of Sedro-Woolley, Washington on Fri, Apr 17, 1981, 2:56 PM PST (22:56 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.5 6 km NNE of Oso, Washington. This one was a foreshock.

Sedro-Woolley forecastMore in Washington

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
2.4 (md), micro
Local time
UTC
1981-04-17 22:56:18 UTC
Depth
3.3 km (2.1 mi), shallow
Epicenter
48.513° N, 122.196° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.7 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
104°
Stations used
12

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 1.56 km SSE of Alger, Washington · 16592 days ago · 10 km deep · 11 km away
  2. 1.77 km NNW of Kingston, Washington · 16587 days ago · 29 km deep · 78 km away
  3. 1.56 km NNE of Oso, Washington · 16586 days ago · 0 km deep · 30 km away
  4. 1.76 km NNE of Oso, Washington · 16579 days ago · 0 km deep · 30 km away
  5. 2.05 km NNE of Oso, Washington · 16579 days ago · 5 km deep · 32 km away
  6. 1.65 km NNE of Oso, Washington · 16579 days ago · 1 km deep · 30 km away
  7. 2.56 km NNE of Oso, Washington · 16579 days ago · 1 km deep · 31 km away
  8. 1.55 km NNE of Oso, Washington · 16579 days ago · 0 km deep · 30 km away
  9. 1.5Washington · 16577 days ago · 1 km deep · 30 km away
  10. 1.52 km SW of Roosevelt, Washington · 16576 days ago · 25 km deep · 72 km away
  11. 2.413 km WSW of Ault Field, Washington · 16568 days ago · 29 km deep · 54 km away
  12. 2.06 km NNE of Port Townsend, Washington · 16567 days ago · 21 km deep · 55 km away
  13. 2.40 km W of Mountlake Terrace, Washington · 16564 days ago · 23 km deep · 81 km away
  14. 1.519 km NNE of Index, Washington · 16563 days ago · 6 km deep · 78 km away
  15. 1.71 km SE of Redmond, Washington · 16562 days ago · 11 km deep · 94 km away
  16. 1.68 km SSW of Concrete, Washington · 16558 days ago · 3 km deep · 32 km away
  17. 1.512 km NNE of Hamilton, Washington · 16553 days ago · -1 km deep · 23 km away
  18. 1.814 km NNE of Hamilton, Washington · 16553 days ago · -1 km deep · 26 km away
  19. 2.56 km NNW of Bangor Trident Base, Washington · 16547 days ago · 21 km deep · 91 km away
  20. 1.53 km ENE of Union Hill-Novelty Hill, Washington · 16547 days ago · -1 km deep · 93 km away
  21. 1.9Washington · 16547 days ago · -1 km deep · 93 km away
  22. 1.911 km NE of Oak Bay, Canada · 16542 days ago · 35 km deep · 72 km away
  23. 2.37 km ENE of Quilcene, Washington · 16540 days ago · 52 km deep · 87 km away
  24. 1.815 km NNE of Hamilton, Washington · 16538 days ago · -1 km deep · 25 km away
  25. 1.915 km NNE of Hamilton, Washington · 16537 days ago · -1 km deep · 25 km away
  26. 1.516 km SSE of Darrington, Washington · 16534 days ago · 9 km deep · 67 km away
  27. 1.54 km WSW of Darrington, Washington · 16533 days ago · 9 km deep · 50 km away

Before

  1. 2.122 km ENE of Glacier, Washington · 16593 days ago · -1 km deep · 63 km away
  2. 1.711 km NNE of North Saanich, Canada · 16595 days ago · 14 km deep · 88 km away
  3. 1.916 km NNE of May Creek, Washington · 16596 days ago · 7 km deep · 76 km away
  4. 1.84 km SSW of Hamilton, Washington · 16597 days ago · 3 km deep · 13 km away
  5. 1.69 km ESE of Salt Spring Island, Canada · 16600 days ago · 20 km deep · 91 km away
  6. 1.68 km WNW of Alger, Washington · 16601 days ago · -1 km deep · 24 km away
  7. 1.53 km SE of Echo Lake, Washington · 16607 days ago · 16 km deep · 84 km away
  8. 1.7Washington · 16608 days ago · 4 km deep · 77 km away
  9. 1.9Washington · 16608 days ago · 2 km deep · 1 km away
  10. 2.24 km S of Coupeville, Washington · 16610 days ago · 25 km deep · 52 km away
  11. 1.518 km NNE of Index, Washington · 16616 days ago · 2 km deep · 78 km away
  12. 2.47 km SSE of Coupeville, Washington · 16617 days ago · 25 km deep · 52 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10105308. Read Tue, Sep 22, 2026, 4:28 AM UTC.