Washington earthquakes

M1.6 earthquake 25 km S of Morton, Washington

A magnitude 1.6 earthquake struck 25 km S of Morton, Washington on Wed, Jul 28, 1982, 5:17 PM PDT (00:17 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.3 1 km SSE 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
1.6 (md), micro
Local time
UTC
1982-07-29 00:17:49 UTC
Depth
8.0 km (5.0 mi), shallow
Epicenter
46.328° N, 122.231° 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 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
72°
Stations used
15

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 10 in the 30 days before it.

After

  1. 2.31 km SSE of Ashford, Washington · 16124 days ago · 7 km deep · 49 km away
  2. 1.88 km E of Ashford, Washington · 16123 days ago · -1 km deep · 53 km away
  3. 1.94 km WSW of Packwood, Washington · 16121 days ago · 12 km deep · 48 km away
  4. 1.838 km NNE of Amboy, Washington · 16117 days ago · 0 km deep · 14 km away
  5. 1.638 km NNE of Amboy, Washington · 16109 days ago · 0 km deep · 14 km away
  6. 1.838 km NNE of Amboy, Washington · 16108 days ago · 0 km deep · 14 km away
  7. 1.94 km SSW of Orting, Washington · 16108 days ago · -1 km deep · 81 km away
  8. 1.942 km WNW of Trout Lake, Washington · 16108 days ago · 0 km deep · 23 km away
  9. 2.538 km NNE of Amboy, Washington · 16107 days ago · 0 km deep · 14 km away
  10. 1.538 km NNE of Amboy, Washington · 16107 days ago · 0 km deep · 14 km away
  11. 2.037 km NNE of Amboy, Washington · 16107 days ago · -1 km deep · 15 km away
  12. 1.638 km NNE of Amboy, Washington · 16107 days ago · -1 km deep · 14 km away
  13. 2.537 km NNE of Amboy, Washington · 16107 days ago · 0 km deep · 14 km away
  14. 2.837 km NNE of Amboy, Washington · 16106 days ago · 0 km deep · 14 km away
  15. 1.913 km SE of Mossyrock, Washington · 16106 days ago · 10 km deep · 17 km away
  16. 2.137 km NNE of Amboy, Washington · 16106 days ago · 1 km deep · 15 km away
  17. 1.737 km NNE of Amboy, Washington · 16106 days ago · 0 km deep · 16 km away
  18. 2.322 km S of Morton, Washington · 16105 days ago · 8 km deep · 4 km away
  19. 1.525 km S of Morton, Washington · 16099 days ago · 8 km deep · 1 km away
  20. 2.423 km ESE of Packwood, Washington · 16096 days ago · 0 km deep · 69 km away
  21. 1.916 km NNE of Ashford, Washington · 16095 days ago · 8 km deep · 66 km away
  22. 1.723 km ESE of Packwood, Washington · 16095 days ago · 2 km deep · 68 km away
  23. 1.86 km S of Greenwater, Washington · 16091 days ago · 2 km deep · 96 km away
  24. 1.837 km SSE of Morton, Washington · 16090 days ago · 9 km deep · 13 km away
  25. 1.613 km NE of Ashford, Washington · 16090 days ago · 9 km deep · 63 km away
  26. 1.622 km S of Morton, Washington · 16089 days ago · 4 km deep · 3 km away
  27. 2.222 km ESE of Packwood, Washington · 16087 days ago · 0 km deep · 69 km away
  28. 1.612 km NE of Ashford, Washington · 16080 days ago · 9 km deep · 62 km away
  29. 1.83 km NNE of Packwood, Washington · 16076 days ago · 4 km deep · 56 km away
  30. 1.936 km NNE of Amboy, Washington · 16076 days ago · -1 km deep · 15 km away
  31. 1.823 km S of Morton, Washington · 16073 days ago · 9 km deep · 2 km away
  32. 1.517 km NW of Packwood, Washington · 16070 days ago · -1 km deep · 55 km away

Before

  1. 2.111 km S of Greenwater, Washington · 16128 days ago · 0 km deep · 92 km away
  2. 1.633 km NE of Amboy, Washington · 16129 days ago · 1 km deep · 21 km away
  3. 1.624 km S of Morton, Washington · 16131 days ago · 5 km deep · 1 km away
  4. 2.923 km ESE of Packwood, Washington · 16137 days ago · 6 km deep · 69 km away
  5. 2.412 km E of Wilkeson, Washington · 16139 days ago · 17 km deep · 90 km away
  6. 1.537 km S of Morton, Washington · 16139 days ago · -1 km deep · 12 km away
  7. 1.924 km ESE of Packwood, Washington · 16144 days ago · -1 km deep · 69 km away
  8. 1.724 km S of Greenwater, Washington · 16144 days ago · 8 km deep · 82 km away
  9. 1.631 km NE of Yacolt, Washington · 16147 days ago · 1 km deep · 36 km away
  10. 2.32 km SE of Crocker, Washington · 16154 days ago · -1 km deep · 83 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10142718. Read Tue, Sep 22, 2026, 2:45 PM UTC.