Washington earthquakes

M1.7 earthquake 36 km SSE of Morton, Washington

A magnitude 1.7 earthquake struck 36 km SSE of Morton, Washington on Thu, Aug 7, 1986, 2:03 AM PDT (09:03 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M2.3 8 km NNW of Onalaska, 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
1.7 (md), micro
Local time
UTC
1986-08-07 09:03:03 UTC
Depth
9.4 km (5.9 mi), shallow
Epicenter
46.266° N, 122.049° 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 0.3 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
64°
Stations used
34

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 32 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.537 km NNE of Amboy, Washington · 14647 days ago · -1 km deep · 14 km away
  2. 2.38 km NNW of Onalaska, Washington · 14639 days ago · 57 km deep · 70 km away
  3. 2.07 km NE of Ashford, Washington · 14636 days ago · 4 km deep · 60 km away
  4. 1.68 km S of Rainier, Washington · 14636 days ago · 7 km deep · 78 km away
  5. 2.810 km NE of Ashford, Washington · 14635 days ago · 11 km deep · 64 km away
  6. 2.714 km NNW of Carson, Washington · 14635 days ago · 8 km deep · 49 km away
  7. 1.538 km NNE of Amboy, Washington · 14634 days ago · -2 km deep · 13 km away
  8. 1.637 km NNE of Amboy, Washington · 14625 days ago · -2 km deep · 13 km away
  9. 1.738 km NNE of Amboy, Washington · 14623 days ago · -2 km deep · 13 km away
  10. 1.538 km NNE of Amboy, Washington · 14623 days ago · -2 km deep · 13 km away
  11. 2.138 km NNE of Amboy, Washington · 14622 days ago · -2 km deep · 12 km away
  12. 1.537 km NNE of Amboy, Washington · 14622 days ago · -2 km deep · 13 km away
  13. 2.137 km NNE of Amboy, Washington · 14621 days ago · -2 km deep · 14 km away
  14. 1.938 km NNE of Amboy, Washington · 14619 days ago · -1 km deep · 13 km away
  15. 1.638 km NNE of Amboy, Washington · 14619 days ago · -1 km deep · 13 km away
  16. 1.938 km NNE of Amboy, Washington · 14618 days ago · -1 km deep · 13 km away
  17. 2.237 km NNE of Amboy, Washington · 14617 days ago · -2 km deep · 13 km away
  18. 1.7Washington · 14602 days ago · -1 km deep · 13 km away
  19. 2.137 km NNE of Amboy, Washington · 14602 days ago · -1 km deep · 13 km away
  20. 2.138 km NNE of Amboy, Washington · 14601 days ago · -2 km deep · 13 km away
  21. 1.938 km NNE of Amboy, Washington · 14597 days ago · -1 km deep · 13 km away
  22. 1.738 km NNE of Amboy, Washington · 14597 days ago · -1 km deep · 13 km away
  23. 1.638 km NNE of Amboy, Washington · 14597 days ago · -2 km deep · 13 km away
  24. 1.638 km NNE of Amboy, Washington · 14597 days ago · -2 km deep · 13 km away
  25. 1.638 km NNE of Amboy, Washington · 14597 days ago · -1 km deep · 13 km away
  26. 1.738 km NNE of Amboy, Washington · 14596 days ago · -1 km deep · 13 km away
  27. 1.838 km NNE of Amboy, Washington · 14596 days ago · -1 km deep · 13 km away
  28. 1.738 km NNE of Amboy, Washington · 14596 days ago · -1 km deep · 13 km away
  29. 2.238 km NNE of Amboy, Washington · 14596 days ago · -1 km deep · 13 km away
  30. 2.638 km NNE of Amboy, Washington · 14596 days ago · -1 km deep · 13 km away
  31. 2.138 km NNE of Amboy, Washington · 14596 days ago · -1 km deep · 13 km away
  32. 2.338 km NNE of Amboy, Washington · 14596 days ago · -1 km deep · 13 km away

Before

  1. 2.714 km NNW of Carson, Washington · 14657 days ago · 9 km deep · 49 km away
  2. 1.538 km NNE of Amboy, Washington · 14657 days ago · -1 km deep · 13 km away
  3. 1.615 km S of Nile, Washington · 14660 days ago · 9 km deep · 95 km away
  4. 1.77 km NNW of Tenino, Washington · 14668 days ago · 52 km deep · 97 km away
  5. 2.412 km SE of Mossyrock, Washington · 14682 days ago · 10 km deep · 32 km away
  6. 1.828 km S of Mossyrock, Washington · 14684 days ago · 14 km deep · 31 km away
  7. 2.037 km NNE of Amboy, Washington · 14684 days ago · -1 km deep · 13 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10210258. Read Tue, Sep 22, 2026, 8:40 AM UTC.