Washington earthquakes

M1.8 earthquake 4 km SSW of Hamilton, Washington

A magnitude 1.8 earthquake struck 4 km SSW of Hamilton, Washington on Tue, Apr 14, 1981, 5:15 AM PST (13:15 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M1.9 16 km NNE of May Creek, Washington. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.8 (md), micro
Local time
UTC
1981-04-14 13:15:42 UTC
Depth
2.8 km (1.8 mi), shallow
Epicenter
48.486° N, 122.023° 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 1.3 km horizontally, 1.5 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
93°
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 28 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 1.916 km NNE of May Creek, Washington · 16595 days ago · 7 km deep · 66 km away
  2. 2.122 km ENE of Glacier, Washington · 16593 days ago · -1 km deep · 59 km away
  3. 2.43 km ENE of Sedro-Woolley, Washington · 16593 days ago · 3 km deep · 13 km away
  4. 1.56 km SSE of Alger, Washington · 16591 days ago · 10 km deep · 23 km away
  5. 1.77 km NNW of Kingston, Washington · 16586 days ago · 29 km deep · 81 km away
  6. 1.56 km NNE of Oso, Washington · 16586 days ago · 0 km deep · 20 km away
  7. 1.76 km NNE of Oso, Washington · 16579 days ago · 0 km deep · 20 km away
  8. 2.05 km NNE of Oso, Washington · 16579 days ago · 5 km deep · 21 km away
  9. 1.65 km NNE of Oso, Washington · 16579 days ago · 1 km deep · 21 km away
  10. 2.56 km NNE of Oso, Washington · 16579 days ago · 1 km deep · 21 km away
  11. 1.55 km NNE of Oso, Washington · 16579 days ago · 0 km deep · 20 km away
  12. 1.5Washington · 16577 days ago · 1 km deep · 20 km away
  13. 1.52 km SW of Roosevelt, Washington · 16575 days ago · 25 km deep · 68 km away
  14. 2.413 km WSW of Ault Field, Washington · 16568 days ago · 29 km deep · 64 km away
  15. 2.06 km NNE of Port Townsend, Washington · 16566 days ago · 21 km deep · 63 km away
  16. 2.40 km W of Mountlake Terrace, Washington · 16564 days ago · 23 km deep · 81 km away
  17. 1.519 km NNE of Index, Washington · 16562 days ago · 6 km deep · 67 km away
  18. 1.71 km SE of Redmond, Washington · 16561 days ago · 11 km deep · 91 km away
  19. 1.68 km SSW of Concrete, Washington · 16558 days ago · 3 km deep · 19 km away
  20. 1.512 km NNE of Hamilton, Washington · 16552 days ago · -1 km deep · 17 km away
  21. 1.814 km NNE of Hamilton, Washington · 16552 days ago · -1 km deep · 19 km away
  22. 2.56 km NNW of Bangor Trident Base, Washington · 16547 days ago · 21 km deep · 95 km away
  23. 1.53 km ENE of Union Hill-Novelty Hill, Washington · 16546 days ago · -1 km deep · 88 km away
  24. 1.9Washington · 16546 days ago · -1 km deep · 89 km away
  25. 1.911 km NE of Oak Bay, Canada · 16542 days ago · 35 km deep · 85 km away
  26. 2.37 km ENE of Quilcene, Washington · 16540 days ago · 52 km deep · 91 km away
  27. 1.815 km NNE of Hamilton, Washington · 16538 days ago · -1 km deep · 20 km away
  28. 1.915 km NNE of Hamilton, Washington · 16537 days ago · -1 km deep · 20 km away

Before

  1. 1.68 km WNW of Alger, Washington · 16601 days ago · -1 km deep · 36 km away
  2. 1.811 km NNE of Snoqualmie, Washington · 16603 days ago · 13 km deep · 99 km away
  3. 1.53 km SE of Echo Lake, Washington · 16606 days ago · 16 km deep · 80 km away
  4. 1.7Washington · 16607 days ago · 4 km deep · 67 km away
  5. 1.9Washington · 16607 days ago · 2 km deep · 12 km away
  6. 2.24 km S of Coupeville, Washington · 16609 days ago · 25 km deep · 60 km away
  7. 1.518 km NNE of Index, Washington · 16616 days ago · 2 km deep · 68 km away
  8. 2.47 km SSE of Coupeville, Washington · 16616 days ago · 25 km deep · 59 km away
  9. 2.313 km WNW of Orcas, Washington · 16625 days ago · 17 km deep · 82 km away
  10. 1.56 km SE of Freeland, Washington · 16625 days ago · 50 km deep · 67 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10103263. Read Mon, Sep 21, 2026, 7:58 PM UTC.