Washington earthquakes

M1.9 earthquake 22 km S of Morton, Washington

A magnitude 1.9 earthquake struck 22 km S of Morton, Washington on Wed, Oct 20, 1982, 11:26 PM PDT (06:26 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.7 Washington-Oregon border region. 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
1.9 (md), micro
Local time
UTC
1982-10-21 06:26:22 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
46.360° N, 122.236° 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
±0.05
Depth from
From location
Station coverage gap
40°
Stations used
27

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 3 in the 30 days before it.

After

  1. 1.538 km S of Morton, Washington · 16035 days ago · -2 km deep · 16 km away
  2. 1.539 km NNE of Amboy, Washington · 16035 days ago · -2 km deep · 18 km away
  3. 1.538 km NNE of Amboy, Washington · 16031 days ago · -1 km deep · 18 km away
  4. 1.92 km NE of Brush Prairie, Washington · 16029 days ago · 10 km deep · 71 km away
  5. 1.538 km NNE of Amboy, Washington · 16029 days ago · -2 km deep · 18 km away
  6. 1.638 km NNE of Amboy, Washington · 16029 days ago · -2 km deep · 17 km away
  7. 1.620 km NNE of Ashford, Washington · 16028 days ago · 3 km deep · 67 km away
  8. 1.838 km NNE of Amboy, Washington · 16025 days ago · -2 km deep · 18 km away
  9. 1.58 km ENE of Onalaska, Washington · 16024 days ago · 26 km deep · 41 km away
  10. 1.824 km S of Morton, Washington · 16019 days ago · 10 km deep · 2 km away
  11. 1.538 km NNE of Amboy, Washington · 16019 days ago · -2 km deep · 18 km away
  12. 1.813 km NNE of Ashford, Washington · 16018 days ago · 8 km deep · 60 km away
  13. 1.638 km NNE of Amboy, Washington · 16016 days ago · -2 km deep · 18 km away
  14. 1.931 km S of Morton, Washington · 16016 days ago · 9 km deep · 10 km away
  15. 1.638 km NNE of Amboy, Washington · 16015 days ago · -1 km deep · 18 km away
  16. 2.7Washington-Oregon border region · 16011 days ago · 25 km deep · 70 km away
  17. 2.236 km SSE of Morton, Washington · 16007 days ago · 7 km deep · 16 km away
  18. 2.625 km S of Morton, Washington · 16004 days ago · 10 km deep · 3 km away
  19. 1.538 km NNE of Amboy, Washington · 15998 days ago · 0 km deep · 18 km away
  20. 1.520 km E of Kelso, Washington · 15998 days ago · 12 km deep · 39 km away
  21. 1.538 km S of Morton, Washington · 15995 days ago · -2 km deep · 17 km away
  22. 2.14 km WSW of Lake Shore, Washington · 15992 days ago · 16 km deep · 86 km away
  23. 2.138 km NNE of Amboy, Washington · 15992 days ago · -1 km deep · 18 km away
  24. 2.222 km S of Morton, Washington · 15990 days ago · 14 km deep · 4 km away
  25. 1.930 km S of Mossyrock, Washington · 15990 days ago · 15 km deep · 22 km away
  26. 2.413 km WSW of Greenwater, Washington · 15987 days ago · 14 km deep · 90 km away
  27. 1.538 km NNE of Amboy, Washington · 15985 days ago · -1 km deep · 17 km away
  28. 1.538 km S of Morton, Washington · 15985 days ago · -2 km deep · 16 km away
  29. 2.723 km ESE of Packwood, Washington · 15982 days ago · 4 km deep · 68 km away

Before

  1. 2.021 km S of Morton, Washington · 16051 days ago · 10 km deep · 2 km away
  2. 1.725 km S of Morton, Washington · 16054 days ago · 8 km deep · 4 km away
  3. 1.517 km NW of Packwood, Washington · 16069 days ago · -1 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10148863. Read Tue, Sep 22, 2026, 7:51 AM UTC.