Washington earthquakes

M1.8 earthquake 4 km SSE of Mossyrock, Washington

A magnitude 1.8 earthquake struck 4 km SSE of Mossyrock, Washington on Wed, Dec 5, 1990, 5:29 PM PST (01:29 UTC), 19 km (12 mi) below the surface.

A larger quake followed: M2.3 25 km ENE of Ashford, Washington. This one was a foreshock.

Mossyrock 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, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1990-12-06 01:29:50 UTC
Depth
19.0 km (11.8 mi), shallow
Epicenter
46.486° N, 122.469° 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, 0.5 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
77°
Stations used
36

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 2.11 km NW of Bonney Lake, Washington · 13079 days ago · 11 km deep · 80 km away
  2. 1.925 km ENE of Ashford, Washington · 13078 days ago · -2 km deep · 70 km away
  3. 1.53 km WSW of Wauna, Washington · 13077 days ago · 20 km deep · 99 km away
  4. 1.64 km SSW of Orting, Washington · 13075 days ago · 1 km deep · 66 km away
  5. 2.325 km ENE of Ashford, Washington · 13070 days ago · -2 km deep · 70 km away
  6. 1.637 km NNE of Amboy, Washington · 13069 days ago · -1 km deep · 38 km away
  7. 2.136 km NNE of Amboy, Washington · 13069 days ago · 1 km deep · 39 km away
  8. 1.638 km NNE of Amboy, Washington · 13069 days ago · 0 km deep · 38 km away
  9. 1.738 km NNE of Amboy, Washington · 13069 days ago · 0 km deep · 38 km away
  10. 1.73 km NNE of Home, Washington · 13069 days ago · 16 km deep · 93 km away
  11. 1.638 km NNE of Amboy, Washington · 13069 days ago · -1 km deep · 38 km away
  12. 1.538 km NNE of Amboy, Washington · 13068 days ago · 0 km deep · 38 km away
  13. 2.18 km N of Bethany, Oregon · 13062 days ago · 17 km deep · 99 km away
  14. 1.720 km S of Packwood, Washington · 13058 days ago · -1 km deep · 65 km away
  15. 1.538 km NNE of Amboy, Washington · 13057 days ago · 2 km deep · 38 km away
  16. 1.84 km SSE of Walnut Grove, Washington · 13056 days ago · 17 km deep · 96 km away
  17. 2.110 km SW of Greenwater, Washington · 13054 days ago · 15 km deep · 86 km away
  18. 1.938 km NNE of Amboy, Washington · 13054 days ago · 2 km deep · 38 km away
  19. 1.738 km NNE of Amboy, Washington · 13048 days ago · -1 km deep · 38 km away
  20. 1.56 km SW of Packwood, Washington · 13037 days ago · 4 km deep · 56 km away
  21. 1.715 km S of Morton, Washington · 13037 days ago · 7 km deep · 19 km away
  22. 1.822 km NNW of Carson, Washington · 13030 days ago · 6 km deep · 76 km away
  23. 1.613 km SE of Rainier, Washington · 13029 days ago · 12 km deep · 34 km away
  24. 1.813 km NNE of Ashford, Washington · 13027 days ago · 7 km deep · 58 km away
  25. 1.511 km ESE of Yacolt, Washington · 13025 days ago · 8 km deep · 76 km away

Before

  1. 1.638 km NNE of Amboy, Washington · 13091 days ago · 0 km deep · 38 km away
  2. 1.837 km NNE of Amboy, Washington · 13094 days ago · 0 km deep · 38 km away
  3. 2.38 km NW of Longview Heights, Washington · 13097 days ago · 23 km deep · 50 km away
  4. 1.838 km NNE of Amboy, Washington · 13105 days ago · -2 km deep · 38 km away
  5. 1.723 km ENE of Ashford, Washington · 13106 days ago · -2 km deep · 69 km away
  6. 1.55 km SW of Pe Ell, Washington · 13107 days ago · 25 km deep · 67 km away
  7. 1.621 km E of Kelso, Washington · 13109 days ago · 13 km deep · 40 km away
  8. 1.923 km S of Morton, Washington · 13110 days ago · 7 km deep · 23 km away
  9. 2.53 km SE of Grapeview, Washington · 13110 days ago · 18 km deep · 95 km away
  10. 2.036 km S of Morton, Washington · 13114 days ago · 0 km deep · 35 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10267338. Read Thu, Oct 1, 2026, 10:25 PM UTC.