Washington earthquakes

M1.8 earthquake 3 km SSE of La Conner, Washington

A magnitude 1.8 earthquake struck 3 km SSE of La Conner, Washington on Fri, Sep 12, 1975, 2:58 PM PDT (21:58 UTC), -1 km (0 mi) below the surface.

A larger quake followed: M2.5 6 km WSW of Lake Cavanaugh, Washington. This one was a foreshock.

La Conner forecastMore in Washington

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
1975-09-12 21:58:57 UTC
Depth
-0.7 km (-0.4 mi), shallow
Epicenter
48.361° N, 122.481° 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 0.1 km horizontally, 0.2 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
97°
Stations used
5

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 14 in the 30 days before it.

After

  1. 2.56 km WSW of Lake Cavanaugh, Washington · 18636 days ago · 3 km deep · 29 km away
  2. 1.51 km NNW of Tukwila, Washington · 18635 days ago · 23 km deep · 98 km away
  3. 2.66 km WSW of Lake Cavanaugh, Washington · 18635 days ago · 7 km deep · 29 km away
  4. 2.06 km SW of Lake Cavanaugh, Washington · 18635 days ago · 11 km deep · 30 km away
  5. 2.50 km ENE of Peaceful Valley, Washington · 18634 days ago · 11 km deep · 69 km away
  6. 1.96 km WSW of Lake Cavanaugh, Washington · 18633 days ago · 9 km deep · 29 km away
  7. 1.91 km NW of Mill Creek, Washington · 18632 days ago · 24 km deep · 58 km away
  8. 2.16 km WSW of Lake Cavanaugh, Washington · 18630 days ago · 2 km deep · 29 km away
  9. 3.56 km SW of Clinton, Washington · 18625 days ago · 26 km deep · 47 km away
  10. 1.74 km ENE of Swede Heaven, Washington · 18623 days ago · -1 km deep · 60 km away
  11. 2.56 km SE of Oak Harbor, Washington · 18623 days ago · 17 km deep · 15 km away
  12. 1.98 km NW of Orcas, Washington · 18622 days ago · 16 km deep · 52 km away
  13. 1.65 km SE of Oak Harbor, Washington · 18621 days ago · 17 km deep · 14 km away
  14. 2.112 km SE of Verlot, Washington · 18621 days ago · 5 km deep · 73 km away
  15. 1.83 km S of Orcas, Washington · 18621 days ago · 3 km deep · 42 km away
  16. 2.015 km ESE of Verlot, Washington · 18620 days ago · 19 km deep · 76 km away
  17. 1.63 km WNW of Victoria, Canada · 18619 days ago · 17 km deep · 69 km away
  18. 3.47 km WNW of Anacortes, Washington · 18617 days ago · 8 km deep · 26 km away
  19. 2.50 km NNE of Erlands Point-Kitsap Lake, Washington · 18614 days ago · 19 km deep · 86 km away
  20. 3.13 km SE of Lake Roesiger, Washington · 18614 days ago · 17 km deep · 63 km away
  21. 2.83 km SSE of Lake Roesiger, Washington · 18612 days ago · 13 km deep · 61 km away
  22. 2.39 km ESE of Alger, Washington · 18608 days ago · 1 km deep · 32 km away
  23. 2.02 km SW of Gold Bar, Washington · 18607 days ago · -1 km deep · 80 km away
  24. 1.76 km NNW of Bangor Trident Base, Washington · 18606 days ago · 13 km deep · 68 km away
  25. 2.513 km W of Ault Field, Washington · 18588 days ago · 51 km deep · 28 km away
  26. 1.53 km NNE of Verlot, Washington · 18588 days ago · 12 km deep · 59 km away
  27. 2.93 km SSE of Lake Roesiger, Washington · 18584 days ago · 17 km deep · 62 km away
  28. 1.62 km SSE of Hansville, Washington · 18578 days ago · 1 km deep · 51 km away

Before

  1. 2.03 km WSW of Woodway, Washington · 18640 days ago · 11 km deep · 64 km away
  2. 2.00 km NNE of Bellevue, Washington · 18640 days ago · 16 km deep · 86 km away
  3. 1.92 km WNW of Bryn Mawr-Skyway, Washington · 18641 days ago · 24 km deep · 97 km away
  4. 1.98 km S of Chilliwack, Canada · 18641 days ago · 6 km deep · 90 km away
  5. 2.02 km SW of Lake Forest Park, Washington · 18641 days ago · 14 km deep · 70 km away
  6. 2.68 km W of Gorst, Washington · 18645 days ago · 21 km deep · 96 km away
  7. 2.53 km N of Kingston, Washington · 18651 days ago · 23 km deep · 59 km away
  8. 2.14 km NE of Carnation, Washington · 18655 days ago · 9 km deep · 89 km away
  9. 2.36 km E of Marrowstone, Washington · 18656 days ago · 24 km deep · 36 km away
  10. 2.22 km N of Union Hill-Novelty Hill, Washington · 18659 days ago · 18 km deep · 80 km away
  11. 2.42 km W of Fall City, Washington · 18659 days ago · 5 km deep · 98 km away
  12. 1.915 km SSW of Blyn, Washington · 18660 days ago · 39 km deep · 69 km away
  13. 1.59 km SSW of Seabeck, Washington · 18666 days ago · 14 km deep · 94 km away
  14. 1.712 km NNE of Maple Falls, Washington · 18667 days ago · 0 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10861743. Read Tue, Sep 22, 2026, 8:26 PM UTC.