Washington earthquakes

M1.8 earthquake 38 km S of Morton, Washington

A magnitude 1.8 earthquake struck 38 km S of Morton, Washington on Wed, Jul 6, 1983, 7:15 AM PDT (14:15 UTC), -2 km (-1 mi) below the surface.

A larger quake followed: M2.4 5 km ENE of Chehalis, 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
1.8 (md), micro
Local time
UTC
1983-07-06 14:15:45 UTC
Depth
-1.6 km (-1.0 mi), shallow
Epicenter
46.215° N, 122.181° 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, 3.8 km in depth
Magnitude uncertainty
±0.11
Depth from
Operator assigned
Station coverage gap
157°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 27 in the 30 days before it.

After

  1. 2.020 km SW of Tampico, Washington · 15789 days ago · -1 km deep · 89 km away
  2. 2.45 km ENE of Chehalis, Washington · 15789 days ago · 52 km deep · 76 km away
  3. 1.638 km NNE of Amboy, Washington · 15787 days ago · -2 km deep · 2 km away
  4. 1.538 km NNE of Amboy, Washington · 15784 days ago · -2 km deep · 1 km away
  5. 1.612 km SSW of Packwood, Washington · 15778 days ago · 1 km deep · 47 km away
  6. 1.838 km NNE of Amboy, Washington · 15775 days ago · -2 km deep · 1 km away
  7. 2.210 km N of Mossyrock, Washington · 15769 days ago · 17 km deep · 51 km away
  8. 2.19 km ENE of Kalama, Washington · 15767 days ago · 15 km deep · 47 km away
  9. 2.48 km ENE of Kalama, Washington · 15767 days ago · 15 km deep · 47 km away
  10. 2.38 km ENE of Kalama, Washington · 15767 days ago · 15 km deep · 48 km away
  11. 2.13 km NNE of Packwood, Washington · 15764 days ago · 4 km deep · 61 km away
  12. 2.212 km S of Pe Ell, Washington · 15761 days ago · -1 km deep · 89 km away
  13. 1.838 km NNE of Amboy, Washington · 15761 days ago · -2 km deep · 1 km away
  14. 1.539 km S of Morton, Washington · 15748 days ago · -2 km deep · 0 km away
  15. 2.238 km NNE of Amboy, Washington · 15738 days ago · -1 km deep · 1 km away
  16. 1.615 km NNE of Packwood, Washington · 15738 days ago · 2 km deep · 74 km away
  17. 1.920 km ENE of Ashford, Washington · 15737 days ago · 0 km deep · 75 km away

Before

  1. 1.739 km NNE of Amboy, Washington · 15791 days ago · 0 km deep · 1 km away
  2. 1.738 km NNE of Amboy, Washington · 15791 days ago · -2 km deep · 1 km away
  3. 2.138 km NNE of Amboy, Washington · 15792 days ago · -2 km deep · 1 km away
  4. 1.722 km ESE of Packwood, Washington · 15795 days ago · -1 km deep · 69 km away
  5. 1.538 km NNE of Amboy, Washington · 15796 days ago · 0 km deep · 1 km away
  6. 1.838 km NNE of Amboy, Washington · 15799 days ago · -2 km deep · 1 km away
  7. 2.137 km NNE of Amboy, Washington · 15799 days ago · -1 km deep · 3 km away
  8. 1.832 km SSW of Packwood, Washington · 15800 days ago · 11 km deep · 28 km away
  9. 2.038 km NNE of Amboy, Washington · 15801 days ago · -1 km deep · 1 km away
  10. 2.117 km S of Morton, Washington · 15803 days ago · 1 km deep · 22 km away
  11. 1.616 km SW of Alder, Washington · 15804 days ago · -1 km deep · 55 km away
  12. 1.738 km NNE of Amboy, Washington · 15805 days ago · -2 km deep · 1 km away
  13. 1.638 km NNE of Amboy, Washington · 15811 days ago · 0 km deep · 2 km away
  14. 1.739 km NNE of Amboy, Washington · 15811 days ago · -2 km deep · 1 km away
  15. 1.639 km NNE of Amboy, Washington · 15812 days ago · -1 km deep · 1 km away
  16. 1.538 km NNE of Amboy, Washington · 15813 days ago · -2 km deep · 1 km away
  17. 1.76 km ESE of Wilkeson, Washington · 15814 days ago · 12 km deep · 98 km away
  18. 1.638 km NNE of Amboy, Washington · 15814 days ago · -2 km deep · 1 km away
  19. 2.238 km NNE of Amboy, Washington · 15814 days ago · -1 km deep · 1 km away
  20. 1.739 km NNE of Amboy, Washington · 15814 days ago · -2 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10157258. Read Sun, Sep 27, 2026, 9:21 PM UTC.