Washington earthquakes

M1.7 earthquake 38 km S of Morton, Washington

A magnitude 1.7 earthquake struck 38 km S of Morton, Washington on Wed, Aug 21, 1985, 11:45 AM PDT (18:45 UTC), -2 km (-1 mi) below the surface.

A larger quake followed: M1.8 13 km ESE 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
1.7 (md), micro
Local time
UTC
1985-08-21 18:45:27 UTC
Depth
-1.6 km (-1.0 mi), shallow
Epicenter
46.215° N, 122.191° 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, 5.1 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
139°
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: 21 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 1.538 km NNE of Amboy, Washington · 15006 days ago · -2 km deep · 1 km away
  2. 1.538 km NNE of Amboy, Washington · 15005 days ago · -2 km deep · 1 km away
  3. 1.715 km ENE of Packwood, Washington · 15004 days ago · 5 km deep · 74 km away
  4. 1.538 km NNE of Amboy, Washington · 14998 days ago · -2 km deep · 1 km away
  5. 1.813 km ESE of Ashford, Washington · 14993 days ago · -1 km deep · 62 km away
  6. 2.5Washington · 14992 days ago · 6 km deep · 12 km away
  7. 2.21 km NE of Brush Prairie, Washington · 14991 days ago · 15 km deep · 58 km away
  8. 1.829 km S of Morton, Washington · 14987 days ago · 10 km deep · 9 km away
  9. 2.37 km SSE of Carbonado, Washington · 14986 days ago · 14 km deep · 90 km away
  10. 1.639 km NNE of Amboy, Washington · 14983 days ago · -2 km deep · 1 km away
  11. 1.92 km NNE of Packwood, Washington · 14976 days ago · 3 km deep · 62 km away
  12. 1.637 km NNE of Amboy, Washington · 14971 days ago · -1 km deep · 2 km away
  13. 2.117 km ESE of Carbonado, Washington · 14967 days ago · 16 km deep · 90 km away
  14. 1.5Washington · 14965 days ago · -1 km deep · 78 km away
  15. 2.728 km NE of Trout Lake, Washington · 14965 days ago · 1 km deep · 70 km away
  16. 2.528 km NE of Trout Lake, Washington · 14965 days ago · -1 km deep · 70 km away
  17. 2.24 km S of Bingen, Washington · 14964 days ago · 7 km deep · 82 km away
  18. 1.611 km NNE of La Center, Washington · 14955 days ago · 8 km deep · 43 km away
  19. 1.523 km E of Castle Rock, Washington · 14954 days ago · 19 km deep · 33 km away
  20. 1.64 km SE of Packwood, Washington · 14951 days ago · 0 km deep · 60 km away
  21. 2.138 km S of Morton, Washington · 14949 days ago · -2 km deep · 1 km away

Before

  1. 1.72 km SSE of Crocker, Washington · 15014 days ago · 0 km deep · 95 km away
  2. 2.414 km SSE of Ashford, Washington · 15019 days ago · 8 km deep · 51 km away
  3. 2.05 km SE of Pe Ell, Washington · 15019 days ago · -1 km deep · 88 km away
  4. 1.6Puget Sound region, Washington · 15020 days ago · 0 km deep · 89 km away
  5. 1.67 km NE of Ashford, Washington · 15023 days ago · 10 km deep · 68 km away
  6. 2.013 km E of Wilkeson, Washington · 15025 days ago · 10 km deep · 100 km away
  7. 1.97 km SSE of Carbonado, Washington · 15027 days ago · 15 km deep · 91 km away
  8. 2.25 km ESE of Kalama, Washington · 15028 days ago · 18 km deep · 51 km away
  9. 1.96 km S of Ashford, Washington · 15030 days ago · 8 km deep · 55 km away
  10. 1.738 km NNE of Amboy, Washington · 15030 days ago · -2 km deep · 1 km away
  11. 1.931 km S of Morton, Washington · 15030 days ago · 3 km deep · 7 km away
  12. 2.126 km S of Morton, Washington · 15033 days ago · 8 km deep · 13 km away
  13. 1.722 km S of Greenwater, Washington · 15033 days ago · 19 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10195283. Read Wed, Sep 23, 2026, 1:58 AM UTC.