Washington earthquakes

M2.5 earthquake 13 km W of Ault Field, Washington

A magnitude 2.5 earthquake struck 13 km W of Ault Field, Washington on Sat, Nov 1, 1975, 11:44 AM PST (19:44 UTC), 51 km (32 mi) below the surface.

A larger quake followed: M2.9 3 km SSE of Lake Roesiger, Washington. This one was a foreshock.

Ault Field 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
2.5 (md), micro
Local time
UTC
1975-11-01 19:44:33 UTC
Depth
51.1 km (31.8 mi), shallow
Epicenter
48.325° N, 122.858° 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 1.8 km horizontally, 3.1 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
110°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.53 km NNE of Verlot, Washington · 18595 days ago · 12 km deep · 84 km away
  2. 2.93 km SSE of Lake Roesiger, Washington · 18592 days ago · 17 km deep · 82 km away
  3. 1.62 km SSE of Hansville, Washington · 18585 days ago · 1 km deep · 53 km away
  4. 2.11 km ENE of Lake Marcel-Stillwater, Washington · 18581 days ago · 6 km deep · 100 km away
  5. 2.13 km WNW of Langford, Canada · 18577 days ago · 20 km deep · 53 km away
  6. 1.814 km ESE of Verlot, Washington · 18577 days ago · 8 km deep · 98 km away
  7. 1.72 km WSW of Monroe, Washington · 18576 days ago · -1 km deep · 82 km away
  8. 1.72 km NE of Monroe, Washington · 18575 days ago · 21 km deep · 85 km away
  9. 1.71 km NE of Lake Marcel-Stillwater, Washington · 18571 days ago · 26 km deep · 99 km away
  10. 2.06 km N of Kingston, Washington · 18569 days ago · 10 km deep · 59 km away
  11. 1.88 km NNW of Camano, Washington · 18569 days ago · 27 km deep · 24 km away
  12. 2.23 km E of Lake Roesiger, Washington · 18561 days ago · 8 km deep · 81 km away
  13. 2.05 km NNW of Bainbridge Island, Washington · 18561 days ago · 19 km deep · 77 km away
  14. 1.72 km SSW of Kirkland, Washington · 18560 days ago · 11 km deep · 87 km away
  15. 1.72 km SSW of Union Hill-Novelty Hill, Washington · 18556 days ago · 2 km deep · 95 km away
  16. 1.71 km ESE of Sooke, Canada · 18553 days ago · 6 km deep · 63 km away
  17. 1.82 km NNW of Manchester, Washington · 18552 days ago · 16 km deep · 86 km away
  18. 2.41 km SE of Esperance, Washington · 18538 days ago · 22 km deep · 72 km away

Before

  1. 1.76 km NNW of Bangor Trident Base, Washington · 18613 days ago · 13 km deep · 61 km away
  2. 2.02 km SW of Gold Bar, Washington · 18614 days ago · -1 km deep · 100 km away
  3. 2.39 km ESE of Alger, Washington · 18615 days ago · 1 km deep · 56 km away
  4. 2.83 km SSE of Lake Roesiger, Washington · 18619 days ago · 13 km deep · 81 km away
  5. 3.13 km SE of Lake Roesiger, Washington · 18621 days ago · 17 km deep · 82 km away
  6. 2.50 km NNE of Erlands Point-Kitsap Lake, Washington · 18621 days ago · 19 km deep · 81 km away
  7. 3.47 km WNW of Anacortes, Washington · 18624 days ago · 8 km deep · 27 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10862128. Read Tue, Sep 29, 2026, 9:57 PM UTC.