Washington earthquakes

M1.6 earthquake 38 km NNE of Amboy, Washington

A magnitude 1.6 earthquake struck 38 km NNE of Amboy, Washington on Fri, Sep 30, 1983, 5:44 PM PDT (00:44 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M2.2 19 km S of Morton, Washington. This one was a foreshock.

Amboy 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
1.6 (md), micro
Local time
UTC
1983-10-01 00:44:13 UTC
Depth
-1.3 km (-0.8 mi), shallow
Epicenter
46.202° N, 122.186° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.17
Depth from
Operator assigned
Station coverage gap
69°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.219 km S of Morton, Washington · 15696 days ago · 8 km deep · 21 km away
  2. 1.914 km SW of Alder, Washington · 15695 days ago · -1 km deep · 60 km away
  3. 1.917 km SE of Carbonado, Washington · 15692 days ago · -1 km deep · 86 km away
  4. 1.737 km NNE of Amboy, Washington · 15691 days ago · -1 km deep · 0 km away
  5. 1.637 km NNE of Amboy, Washington · 15690 days ago · -1 km deep · 1 km away
  6. 1.520 km S of Morton, Washington · 15684 days ago · 9 km deep · 20 km away
  7. 1.736 km NNE of Amboy, Washington · 15681 days ago · -1 km deep · 2 km away
  8. 2.55 km SW of Morton, Washington · 15675 days ago · 16 km deep · 37 km away
  9. 2.212 km NNE of La Center, Washington · 15667 days ago · 11 km deep · 41 km away
  10. 1.538 km NNE of Amboy, Washington · 15667 days ago · 0 km deep · 0 km away
  11. 2.112 km WNW of Amboy, Washington · 15666 days ago · 11 km deep · 41 km away
  12. 2.026 km S of Morton, Washington · 15666 days ago · 9 km deep · 15 km away
  13. 1.611 km WNW of Warren, Oregon · 15663 days ago · 15 km deep · 72 km away
  14. 2.420 km E of Packwood, Washington · 15662 days ago · -1 km deep · 75 km away
  15. 1.737 km NNE of Amboy, Washington · 15658 days ago · 0 km deep · 1 km away
  16. 1.522 km S of Morton, Washington · 15653 days ago · 10 km deep · 18 km away
  17. 2.922 km NE of Ashford, Washington · 15652 days ago · -1 km deep · 81 km away
  18. 2.138 km NNE of Amboy, Washington · 15650 days ago · -2 km deep · 1 km away
  19. 2.138 km S of Morton, Washington · 15648 days ago · -2 km deep · 1 km away
  20. 1.838 km NNE of Amboy, Washington · 15645 days ago · -2 km deep · 1 km away
  21. 1.838 km NNE of Amboy, Washington · 15645 days ago · 1 km deep · 1 km away
  22. 1.638 km NNE of Amboy, Washington · 15645 days ago · -2 km deep · 0 km away
  23. 1.835 km S of Morton, Washington · 15644 days ago · -2 km deep · 5 km away
  24. 1.8Washington · 15640 days ago · -2 km deep · 0 km away
  25. 1.838 km NNE of Amboy, Washington · 15639 days ago · -2 km deep · 0 km away
  26. 1.638 km NNE of Amboy, Washington · 15639 days ago · -2 km deep · 1 km away
  27. 1.638 km NNE of Amboy, Washington · 15639 days ago · -2 km deep · 1 km away
  28. 1.937 km NNE of Amboy, Washington · 15638 days ago · -2 km deep · 0 km away
  29. 2.038 km NNE of Amboy, Washington · 15638 days ago · -2 km deep · 0 km away

Before

  1. 1.625 km SSE of Packwood, Washington · 15701 days ago · 0 km deep · 56 km away
  2. 2.125 km SSE of Packwood, Washington · 15702 days ago · 0 km deep · 57 km away
  3. 2.025 km SSE of Packwood, Washington · 15704 days ago · -1 km deep · 56 km away
  4. 1.638 km NNE of Amboy, Washington · 15709 days ago · -1 km deep · 0 km away
  5. 2.310 km SE of Mossyrock, Washington · 15713 days ago · 14 km deep · 33 km away
  6. 2.211 km ESE of Carbonado, Washington · 15714 days ago · 18 km deep · 96 km away
  7. 1.823 km ESE of Packwood, Washington · 15717 days ago · -1 km deep · 71 km away
  8. 2.238 km S of Morton, Washington · 15717 days ago · -1 km deep · 1 km away
  9. 2.227 km S of Greenwater, Washington · 15724 days ago · -1 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10164668. Read Tue, Sep 22, 2026, 3:34 PM UTC.