Washington earthquakes

M1.8 earthquake 38 km NNE of Amboy, Washington

A magnitude 1.8 earthquake struck 38 km NNE of Amboy, Washington on Sun, Apr 20, 1986, 5:08 AM PST (13:08 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M1.9 38 km NNE of Amboy, 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), micro
Local time
UTC
1986-04-20 13:08:30 UTC
Depth
-1.3 km (-0.8 mi), shallow
Epicenter
46.200° N, 122.177° 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, 4.2 km in depth
Magnitude uncertainty
±0.11
Depth from
Operator assigned
Station coverage gap
125°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 105 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 1.536 km NNE of Amboy, Washington · 14764 days ago · 1 km deep · 2 km away
  2. 1.938 km NNE of Amboy, Washington · 14764 days ago · -1 km deep · 1 km away
  3. 1.638 km NNE of Amboy, Washington · 14764 days ago · -1 km deep · 1 km away
  4. 2.038 km NNE of Amboy, Washington · 14764 days ago · 1 km deep · 1 km away
  5. 1.538 km NNE of Amboy, Washington · 14762 days ago · -2 km deep · 1 km away
  6. 1.73 km N of Woodland, Washington · 14761 days ago · 14 km deep · 52 km away
  7. 2.237 km NNE of Amboy, Washington · 14761 days ago · 0 km deep · 1 km away
  8. 2.838 km NNE of Amboy, Washington · 14758 days ago · -2 km deep · 1 km away
  9. 1.938 km NNE of Amboy, Washington · 14757 days ago · -1 km deep · 0 km away
  10. 2.038 km NNE of Amboy, Washington · 14756 days ago · -1 km deep · 1 km away
  11. 1.638 km NNE of Amboy, Washington · 14756 days ago · -1 km deep · 2 km away
  12. 1.837 km NNE of Amboy, Washington · 14754 days ago · 0 km deep · 1 km away
  13. 1.937 km NNE of Amboy, Washington · 14754 days ago · 0 km deep · 1 km away
  14. 2.125 km S of Morton, Washington · 14752 days ago · 10 km deep · 15 km away
  15. 2.038 km NNE of Amboy, Washington · 14752 days ago · 0 km deep · 1 km away
  16. 1.537 km NNE of Amboy, Washington · 14752 days ago · 0 km deep · 1 km away
  17. 1.538 km NNE of Amboy, Washington · 14751 days ago · -1 km deep · 1 km away
  18. 1.537 km NNE of Amboy, Washington · 14751 days ago · 0 km deep · 1 km away
  19. 1.538 km NNE of Amboy, Washington · 14751 days ago · 0 km deep · 1 km away
  20. 1.538 km NNE of Amboy, Washington · 14751 days ago · 0 km deep · 2 km away
  21. 2.637 km NNE of Amboy, Washington · 14751 days ago · 0 km deep · 1 km away
  22. 2.738 km NNE of Amboy, Washington · 14751 days ago · 0 km deep · 1 km away
  23. 2.038 km NNE of Amboy, Washington · 14750 days ago · 0 km deep · 1 km away
  24. 1.637 km NNE of Amboy, Washington · 14750 days ago · 0 km deep · 1 km away
  25. 1.738 km NNE of Amboy, Washington · 14750 days ago · 0 km deep · 1 km away
  26. 2.037 km NNE of Amboy, Washington · 14750 days ago · 0 km deep · 1 km away
  27. 2.037 km NNE of Amboy, Washington · 14750 days ago · 0 km deep · 1 km away
  28. 1.638 km NNE of Amboy, Washington · 14749 days ago · 0 km deep · 1 km away
  29. 1.838 km NNE of Amboy, Washington · 14749 days ago · 0 km deep · 1 km away
  30. 1.838 km NNE of Amboy, Washington · 14749 days ago · 0 km deep · 1 km away
  31. 1.837 km NNE of Amboy, Washington · 14749 days ago · 0 km deep · 1 km away
  32. 2.637 km NNE of Amboy, Washington · 14749 days ago · 0 km deep · 1 km away
  33. 2.237 km NNE of Amboy, Washington · 14749 days ago · 0 km deep · 1 km away
  34. 2.738 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  35. 1.837 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  36. 2.638 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  37. 2.237 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  38. 1.937 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  39. 1.837 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  40. 2.437 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  41. 2.237 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  42. 2.737 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  43. 2.437 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  44. 2.238 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  45. 3.037 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  46. 1.637 km NNE of Amboy, Washington · 14748 days ago · -1 km deep · 1 km away
  47. 2.038 km NNE of Amboy, Washington · 14748 days ago · 0 km deep · 1 km away
  48. 1.537 km NNE of Amboy, Washington · 14747 days ago · -1 km deep · 1 km away
  49. 1.538 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  50. 2.337 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  51. 1.938 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  52. 1.638 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  53. 2.038 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  54. 1.938 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  55. 1.638 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  56. 1.738 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  57. 2.137 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  58. 3.237 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away
  59. 2.237 km NNE of Amboy, Washington · 14747 days ago · 1 km deep · 1 km away
  60. 2.737 km NNE of Amboy, Washington · 14747 days ago · 0 km deep · 1 km away

The first 60 of 105.

Before

  1. 1.938 km NNE of Amboy, Washington · 14765 days ago · -1 km deep · 1 km away
  2. 1.536 km NNE of Amboy, Washington · 14765 days ago · 1 km deep · 1 km away
  3. 1.837 km NNE of Amboy, WA · 14765 days ago · -1 km deep · 2 km away
  4. 1.538 km NNE of Amboy, Washington · 14765 days ago · 1 km deep · 0 km away
  5. 1.538 km NNE of Amboy, Washington · 14765 days ago · 1 km deep · 0 km away
  6. 2.038 km NNE of Amboy, Washington · 14766 days ago · -1 km deep · 1 km away
  7. 1.95 km ESE of Mossyrock, Washington · 14767 days ago · 18 km deep · 40 km away
  8. 1.737 km NNE of Amboy, Washington · 14767 days ago · -2 km deep · 2 km away
  9. 2.538 km NNE of Amboy, Washington · 14768 days ago · -1 km deep · 1 km away
  10. 2.438 km NNE of Amboy, Washington · 14769 days ago · -1 km deep · 1 km away
  11. 1.838 km NNE of Amboy, Washington · 14769 days ago · -2 km deep · 1 km away
  12. 2.739 km NNE of Amboy, Washington · 14770 days ago · -1 km deep · 1 km away
  13. 1.738 km NNE of Amboy, Washington · 14773 days ago · -1 km deep · 1 km away
  14. 1.537 km NNE of Amboy, Washington · 14773 days ago · -1 km deep · 2 km away
  15. 1.53 km WNW of Ashford, Washington · 14785 days ago · 25 km deep · 64 km away
  16. 1.6Washington · 14790 days ago · 4 km deep · 65 km away
  17. 1.86 km SSW of Morton, Washington · 14792 days ago · 19 km deep · 36 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10204653. Read Tue, Sep 22, 2026, 11:14 AM UTC.