Washington earthquakes

M2.3 earthquake 9 km ESE of Alger, Washington

A magnitude 2.3 earthquake struck 9 km ESE of Alger, Washington on Mon, Oct 13, 1975, 1:39 AM PDT (08:39 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M2.5 13 km W of Ault Field, 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.

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The earthquake

Magnitude
2.3 (md), micro
Local time
UTC
1975-10-13 08:39:29 UTC
Depth
1.3 km (0.8 mi), shallow
Epicenter
48.592° N, 122.219° 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 0.8 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
125°
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 20 in the 30 days before it.

After

  1. 2.02 km SW of Gold Bar, Washington · 18606 days ago · -1 km deep · 91 km away
  2. 1.76 km NNW of Bangor Trident Base, Washington · 18606 days ago · 13 km deep · 98 km away
  3. 2.513 km W of Ault Field, Washington · 18588 days ago · 51 km deep · 56 km away
  4. 1.53 km NNE of Verlot, Washington · 18587 days ago · 12 km deep · 62 km away
  5. 2.93 km SSE of Lake Roesiger, Washington · 18584 days ago · 17 km deep · 74 km away
  6. 1.62 km SSE of Hansville, Washington · 18578 days ago · 1 km deep · 80 km away
  7. 2.13 km WNW of Langford, Canada · 18570 days ago · 20 km deep · 99 km away
  8. 1.814 km ESE of Verlot, Washington · 18569 days ago · 8 km deep · 77 km away
  9. 1.72 km WSW of Monroe, Washington · 18568 days ago · -1 km deep · 84 km away
  10. 1.72 km NE of Monroe, Washington · 18567 days ago · 21 km deep · 83 km away
  11. 2.06 km N of Kingston, Washington · 18562 days ago · 10 km deep · 85 km away
  12. 1.88 km NNW of Camano, Washington · 18562 days ago · 27 km deep · 46 km away
  13. 2.23 km E of Lake Roesiger, Washington · 18553 days ago · 8 km deep · 72 km away

Before

  1. 2.83 km SSE of Lake Roesiger, Washington · 18612 days ago · 13 km deep · 74 km away
  2. 3.13 km SE of Lake Roesiger, Washington · 18613 days ago · 17 km deep · 75 km away
  3. 3.47 km WNW of Anacortes, Washington · 18616 days ago · 8 km deep · 36 km away
  4. 1.63 km WNW of Victoria, Canada · 18619 days ago · 17 km deep · 89 km away
  5. 2.015 km ESE of Verlot, Washington · 18619 days ago · 19 km deep · 79 km away
  6. 1.83 km S of Orcas, Washington · 18620 days ago · 3 km deep · 54 km away
  7. 2.112 km SE of Verlot, Washington · 18620 days ago · 5 km deep · 76 km away
  8. 1.65 km SE of Oak Harbor, Washington · 18621 days ago · 17 km deep · 46 km away
  9. 1.98 km NW of Orcas, Washington · 18621 days ago · 16 km deep · 60 km away
  10. 2.56 km SE of Oak Harbor, Washington · 18622 days ago · 17 km deep · 47 km away
  11. 1.74 km ENE of Swede Heaven, Washington · 18623 days ago · -1 km deep · 51 km away
  12. 3.56 km SW of Clinton, Washington · 18625 days ago · 26 km deep · 74 km away
  13. 2.16 km WSW of Lake Cavanaugh, Washington · 18629 days ago · 2 km deep · 34 km away
  14. 1.91 km NW of Mill Creek, Washington · 18632 days ago · 24 km deep · 80 km away
  15. 1.96 km WSW of Lake Cavanaugh, Washington · 18633 days ago · 9 km deep · 34 km away
  16. 2.50 km ENE of Peaceful Valley, Washington · 18633 days ago · 11 km deep · 39 km away
  17. 2.06 km SW of Lake Cavanaugh, Washington · 18634 days ago · 11 km deep · 35 km away
  18. 2.66 km WSW of Lake Cavanaugh, Washington · 18634 days ago · 7 km deep · 34 km away
  19. 1.853 km SSE of Hope, Canada · 18635 days ago · 0 km deep · 95 km away
  20. 2.56 km WSW of Lake Cavanaugh, Washington · 18635 days ago · 3 km deep · 33 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10862013. Read Tue, Sep 22, 2026, 10:00 AM UTC.