Washington earthquakes

M2.5 earthquake 5 km SW of Morton, Washington

A magnitude 2.5 earthquake struck 5 km SW of Morton, Washington on Sun, Oct 23, 1983, 4:52 PM PDT (23:52 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M2.9 22 km NE of Ashford, Washington. This one was a foreshock.

Morton 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
1983-10-23 23:52:48 UTC
Depth
16.2 km (10.1 mi), shallow
Epicenter
46.524° N, 122.322° 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 0.5 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
43°
Stations used
41

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 37 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.02 km NNW of Lakeland South, Washington · 15672 days ago · 13 km deep · 86 km away
  2. 2.212 km NNE of La Center, Washington · 15667 days ago · 11 km deep · 66 km away
  3. 1.538 km NNE of Amboy, Washington · 15667 days ago · 0 km deep · 37 km away
  4. 2.112 km WNW of Amboy, Washington · 15666 days ago · 11 km deep · 66 km away
  5. 2.026 km S of Morton, Washington · 15666 days ago · 9 km deep · 23 km away
  6. 1.611 km WNW of Warren, Oregon · 15663 days ago · 15 km deep · 89 km away
  7. 2.420 km E of Packwood, Washington · 15662 days ago · -1 km deep · 71 km away
  8. 1.737 km NNE of Amboy, Washington · 15659 days ago · 0 km deep · 38 km away
  9. 1.522 km S of Morton, Washington · 15653 days ago · 10 km deep · 19 km away
  10. 2.922 km NE of Ashford, Washington · 15652 days ago · -1 km deep · 57 km away
  11. 2.138 km NNE of Amboy, Washington · 15650 days ago · -2 km deep · 37 km away
  12. 2.138 km S of Morton, Washington · 15648 days ago · -2 km deep · 36 km away
  13. 1.838 km NNE of Amboy, Washington · 15645 days ago · -2 km deep · 37 km away
  14. 1.838 km NNE of Amboy, Washington · 15645 days ago · 1 km deep · 36 km away
  15. 1.638 km NNE of Amboy, Washington · 15645 days ago · -2 km deep · 37 km away
  16. 1.835 km S of Morton, Washington · 15644 days ago · -2 km deep · 32 km away
  17. 1.8Washington · 15640 days ago · -2 km deep · 37 km away
  18. 2.36 km SE of Black Diamond, Washington · 15640 days ago · 14 km deep · 87 km away
  19. 1.838 km NNE of Amboy, Washington · 15639 days ago · -2 km deep · 37 km away
  20. 1.638 km NNE of Amboy, Washington · 15639 days ago · -2 km deep · 37 km away
  21. 1.638 km NNE of Amboy, Washington · 15639 days ago · -2 km deep · 37 km away
  22. 1.937 km NNE of Amboy, Washington · 15638 days ago · -2 km deep · 38 km away
  23. 2.038 km NNE of Amboy, Washington · 15638 days ago · -2 km deep · 37 km away
  24. 1.738 km NNE of Amboy, Washington · 15632 days ago · -2 km deep · 37 km away
  25. 1.538 km NNE of Amboy, Washington · 15628 days ago · -1 km deep · 37 km away
  26. 1.826 km S of Morton, Washington · 15625 days ago · 8 km deep · 23 km away
  27. 1.838 km NNE of Amboy, Washington · 15624 days ago · -2 km deep · 37 km away
  28. 1.537 km NNE of Amboy, Washington · 15624 days ago · -2 km deep · 37 km away
  29. 2.038 km NNE of Amboy, Washington · 15624 days ago · -2 km deep · 37 km away
  30. 1.938 km NNE of Amboy, Washington · 15623 days ago · -2 km deep · 37 km away
  31. 3.01 km N of Black Diamond, Washington · 15621 days ago · 12 km deep · 92 km away
  32. 1.537 km NNE of Amboy, Washington · 15620 days ago · -1 km deep · 38 km away
  33. 1.538 km NNE of Amboy, Washington · 15620 days ago · -1 km deep · 37 km away
  34. 1.934 km NE of Amboy, Washington · 15619 days ago · 9 km deep · 49 km away
  35. 2.138 km NNE of Amboy, Washington · 15617 days ago · -2 km deep · 37 km away
  36. 1.538 km NNE of Amboy, Washington · 15616 days ago · -2 km deep · 37 km away
  37. 1.739 km NNE of Amboy, Washington · 15615 days ago · -2 km deep · 36 km away

Before

  1. 1.58 km NW of Greenwater, Washington · 15681 days ago · -1 km deep · 88 km away
  2. 1.736 km NNE of Amboy, Washington · 15681 days ago · -1 km deep · 39 km away
  3. 1.520 km S of Morton, Washington · 15684 days ago · 9 km deep · 18 km away
  4. 1.637 km NNE of Amboy, Washington · 15690 days ago · -1 km deep · 37 km away
  5. 1.737 km NNE of Amboy, Washington · 15691 days ago · -1 km deep · 38 km away
  6. 1.917 km SE of Carbonado, Washington · 15692 days ago · -1 km deep · 57 km away
  7. 2.04 km S of Des Moines, Washington · 15694 days ago · 13 km deep · 93 km away
  8. 1.914 km SW of Alder, Washington · 15695 days ago · -1 km deep · 23 km away
  9. 2.219 km S of Morton, Washington · 15696 days ago · 8 km deep · 17 km away
  10. 1.638 km NNE of Amboy, Washington · 15698 days ago · -1 km deep · 37 km away
  11. 2.72 km W of Rosedale, Washington · 15699 days ago · 27 km deep · 94 km away
  12. 1.625 km SSE of Packwood, Washington · 15701 days ago · 0 km deep · 63 km away
  13. 2.125 km SSE of Packwood, Washington · 15702 days ago · 0 km deep · 64 km away
  14. 2.025 km SSE of Packwood, Washington · 15704 days ago · -1 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10170768. Read Tue, Sep 22, 2026, 4:09 PM UTC.