Washington earthquakes

M1.8 earthquake 17 km WSW of Alder, Washington

A magnitude 1.8 earthquake struck 17 km WSW of Alder, Washington on Sat, Sep 6, 2025, 6:42 AM PDT (13:42 UTC), 19 km (12 mi) below the surface.

A larger quake followed: M2.8 3 km NE of Mineral, Washington. This one was a foreshock.

Mossyrock 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 (ML, local (Richter)), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2025-09-06 13:42:41 UTC
Depth
19.4 km (12.1 mi), shallow
Epicenter
46.731° N, 122.492° 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 0.4 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
98°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 1.62 km W of Belfair, Washington · 393 days ago · 23 km deep · 85 km away
  2. 1.94 km WSW of Winlock, Washington · 391 days ago · 19 km deep · 48 km away
  3. 1.66 km ESE of Mossyrock, Washington · 389 days ago · 22 km deep · 26 km away
  4. 1.96 km NE of Mossyrock, Washington · 386 days ago · 20 km deep · 18 km away
  5. 1.710 km NW of Belfair, Washington · 386 days ago · 17 km deep · 93 km away
  6. 2.83 km NE of Mineral, Washington · 386 days ago · 17 km deep · 26 km away · felt by 6
  7. 1.723 km N of Trout Lake, Washington · 385 days ago · -1 km deep · 93 km away
  8. 1.62 km NNE of Enetai, Washington · 382 days ago · 25 km deep · 98 km away · felt by 1
  9. 1.95 km WSW of Yacolt, Washington · 380 days ago · 3 km deep · 98 km away
  10. 1.527 km NNW of Amboy, Washington · 378 days ago · 9 km deep · 65 km away
  11. 2.224 km ENE of Ashford, Washington · 366 days ago · -2 km deep · 58 km away
  12. 1.619 km NE of Kalama, Washington · 356 days ago · 20 km deep · 70 km away
  13. 1.70 km W of Beaux Arts Village, Washington · 356 days ago · 27 km deep · 97 km away
  14. 2.338 km SSE of Morton, Washington · 354 days ago · 9 km deep · 63 km away
  15. 1.82 km ESE of Buckley, Washington · 345 days ago · 18 km deep · 60 km away
  16. 2.52 km SE of Buckley, Washington · 344 days ago · 18 km deep · 60 km away · felt by 3
  17. 2.22 km SE of Buckley, Washington · 344 days ago · 17 km deep · 60 km away
  18. 1.66 km ESE of Mossyrock, Washington · 341 days ago · 22 km deep · 26 km away
  19. 2.03 km W of Gorst, Washington · 341 days ago · 22 km deep · 91 km away

Before

  1. 1.68 km SSW of Grapeview, Washington · 399 days ago · 24 km deep · 67 km away
  2. 1.67 km S of Shelton, Washington · 400 days ago · 18 km deep · 66 km away
  3. 2.24 km ESE of Enumclaw, Washington · 400 days ago · 18 km deep · 66 km away
  4. 1.50 km SSW of Carbonado, Washington · 408 days ago · 14 km deep · 50 km away
  5. 1.78 km S of Mineral, Washington · 408 days ago · 13 km deep · 25 km away
  6. 1.91 km NNW of Maple Valley, Washington · 410 days ago · 16 km deep · 82 km away
  7. 1.912 km SW of Lebam, Washington · 412 days ago · 38 km deep · 93 km away · felt by 1
  8. 1.55 km NNE of Dash Point, Washington · 414 days ago · 20 km deep · 71 km away
  9. 2.14 km NE of Vashon, Washington · 415 days ago · 22 km deep · 83 km away
  10. 1.816 km SSE of Carbonado, Washington · 420 days ago · 12 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw62183231. Read Sun, Oct 4, 2026, 10:58 AM UTC.