Washington earthquakes

M1.8 earthquake 37 km NNE of Amboy, Washington

A magnitude 1.8 earthquake struck 37 km NNE of Amboy, Washington on Thu, Apr 26, 1990, 9:30 AM PDT (16:30 UTC), -2 km (-1 mi) below the surface.

A larger quake followed: M2.9 13 km SSW of Morton, Washington. This one was a foreshock.

Amboy 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
1990-04-26 16:30:37 UTC
Depth
-1.6 km (-1.0 mi), shallow
Epicenter
46.199° N, 122.188° 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.

Magnitude uncertainty
±0.04
Depth from
Operator assigned
Station coverage gap
155°
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: 26 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 1.538 km NNE of Amboy, Washington · 13308 days ago · -2 km deep · 0 km away
  2. 2.138 km NNE of Amboy, Washington · 13306 days ago · 2 km deep · 0 km away
  3. 2.237 km NNE of Amboy, Washington · 13303 days ago · 3 km deep · 0 km away
  4. 2.337 km NNE of Amboy, Washington · 13303 days ago · 3 km deep · 0 km away
  5. 1.727 km ENE of Ashford, Washington · 13302 days ago · -2 km deep · 85 km away
  6. 1.538 km NNE of Amboy, Washington · 13294 days ago · -2 km deep · 0 km away
  7. 2.913 km SSW of Morton, Washington · 13288 days ago · 18 km deep · 29 km away
  8. 1.514 km NE of Ashford, Washington · 13288 days ago · 7 km deep · 74 km away
  9. 2.224 km S of Morton, Washington · 13286 days ago · 3 km deep · 16 km away
  10. 2.623 km ENE of Ashford, Washington · 13282 days ago · -2 km deep · 80 km away
  11. 1.823 km S of Morton, Washington · 13282 days ago · 11 km deep · 17 km away
  12. 1.92 km ESE of Alder, Washington · 13281 days ago · 17 km deep · 66 km away
  13. 1.838 km NNE of Amboy, Washington · 13280 days ago · -1 km deep · 0 km away
  14. 2.28 km NNE of Government Camp, Oregon · 13279 days ago · 2 km deep · 100 km away
  15. 1.737 km NNE of Amboy, Washington · 13277 days ago · -2 km deep · 0 km away
  16. 1.838 km NNE of Amboy, Washington · 13276 days ago · -2 km deep · 0 km away
  17. 1.738 km NNE of Amboy, Washington · 13275 days ago · -2 km deep · 0 km away
  18. 1.738 km NNE of Amboy, Washington · 13275 days ago · -1 km deep · 0 km away
  19. 2.023 km ENE of Ashford, Washington · 13274 days ago · -1 km deep · 80 km away
  20. 1.74 km E of Carson, Washington · 13273 days ago · 4 km deep · 62 km away
  21. 1.94 km E of Carson, Washington · 13273 days ago · 4 km deep · 62 km away
  22. 2.0Washington · 13273 days ago · 0 km deep · 0 km away
  23. 1.526 km S of Morton, Washington · 13267 days ago · 8 km deep · 14 km away
  24. 1.528 km ENE of Ashford, Washington · 13267 days ago · -2 km deep · 86 km away
  25. 1.737 km NNE of Amboy, Washington · 13262 days ago · -1 km deep · 0 km away
  26. 1.737 km NNE of Amboy, Washington · 13258 days ago · 2 km deep · 0 km away

Before

  1. 2.410 km W of Packwood, Washington · 13312 days ago · 7 km deep · 52 km away
  2. 2.19 km W of Packwood, Washington · 13312 days ago · 8 km deep · 53 km away
  3. 2.16 km S of Mill Plain, Washington · 13317 days ago · 15 km deep · 72 km away
  4. 1.814 km SE of Mossyrock, Washington · 13321 days ago · 17 km deep · 29 km away
  5. 1.838 km NNE of Amboy, Washington · 13322 days ago · -2 km deep · 0 km away
  6. 1.510 km E of Ashford, Washington · 13322 days ago · 7 km deep · 67 km away
  7. 2.329 km SSW of White Swan, Washington · 13322 days ago · -1 km deep · 96 km away
  8. 1.829 km SSW of White Swan, Washington · 13322 days ago · 0 km deep · 96 km away
  9. 1.522 km ENE of Ashford, Washington · 13330 days ago · -1 km deep · 79 km away
  10. 2.637 km NNE of Amboy, Washington · 13332 days ago · -2 km deep · 0 km away
  11. 1.538 km NNE of Amboy, Washington · 13333 days ago · 3 km deep · 0 km away
  12. 1.70 km SW of Garden Home-Whitford, Oregon · 13336 days ago · 21 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10263023. Read Sun, Oct 4, 2026, 10:18 PM UTC.