Washington earthquakes

M1.5 earthquake 30 km NNE of Amboy, Washington

A magnitude 1.5 earthquake struck 30 km NNE of Amboy, Washington on Mon, Apr 20, 1981, 7:53 PM PST (03:53 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M1.7 17 km E of Packwood, 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
1.5 (md), micro
Local time
UTC
1981-04-21 03:53:50 UTC
Depth
11.5 km (7.1 mi), shallow
Epicenter
46.172° N, 122.317° 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 0.6 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
54°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 74 in the 60 days after this one and 47 in the 30 days before it.

After

  1. 1.717 km E of Packwood, Washington · 16589 days ago · 6 km deep · 84 km away
  2. 1.9Washington-Oregon border region · 16587 days ago · 6 km deep · 53 km away
  3. 1.83 km N of Mount Hood, Oregon · 16581 days ago · 4 km deep · 88 km away
  4. 2.621 km S of Morton, Washington · 16581 days ago · 10 km deep · 22 km away
  5. 2.023 km S of Morton, Washington · 16580 days ago · 8 km deep · 20 km away
  6. 3.121 km S of Morton, Washington · 16580 days ago · 10 km deep · 22 km away
  7. 1.638 km NNE of Amboy, Washington · 16580 days ago · -1 km deep · 10 km away
  8. 2.023 km S of Morton, Washington · 16579 days ago · 9 km deep · 21 km away
  9. 1.824 km S of Morton, Washington · 16578 days ago · 8 km deep · 19 km away
  10. 2.122 km ESE of Packwood, Washington · 16577 days ago · 11 km deep · 82 km away
  11. 2.137 km SSE of Morton, Washington · 16577 days ago · 10 km deep · 23 km away
  12. 1.734 km NE of Amboy, Washington · 16576 days ago · 5 km deep · 16 km away
  13. 1.924 km S of Morton, Washington · 16570 days ago · 11 km deep · 19 km away
  14. 1.537 km SSE of Morton, Washington · 16569 days ago · 10 km deep · 23 km away
  15. 2.724 km S of Morton, Washington · 16569 days ago · 10 km deep · 19 km away
  16. 4.521 km S of Morton, Washington · 16568 days ago · 9 km deep · 22 km away
  17. 3.021 km S of Morton, Washington · 16568 days ago · 9 km deep · 22 km away
  18. 1.524 km S of Morton, Washington · 16566 days ago · 11 km deep · 19 km away
  19. 1.622 km S of Morton, Washington · 16565 days ago · 7 km deep · 21 km away
  20. 1.55 km N of La Center, Washington · 16558 days ago · 16 km deep · 40 km away
  21. 1.522 km S of Morton, Washington · 16555 days ago · 8 km deep · 21 km away
  22. 1.538 km S of Morton, Washington · 16554 days ago · -1 km deep · 11 km away
  23. 3.221 km S of Morton, Washington · 16554 days ago · 9 km deep · 22 km away
  24. 1.621 km S of Morton, Washington · 16554 days ago · 9 km deep · 23 km away
  25. 1.97 km NW of Cathlamet, Washington · 16553 days ago · -1 km deep · 88 km away
  26. 4.622 km ESE of Packwood, Washington · 16553 days ago · 2 km deep · 81 km away
  27. 1.823 km ESE of Packwood, Washington · 16553 days ago · 1 km deep · 81 km away
  28. 5.023 km ESE of Packwood, Washington · 16553 days ago · 2 km deep · 81 km away
  29. 1.522 km ESE of Packwood, Washington · 16553 days ago · 1 km deep · 81 km away
  30. 1.611 km N of Packwood, Washington · 16553 days ago · -2 km deep · 77 km away
  31. 2.422 km ESE of Packwood, Washington · 16553 days ago · 1 km deep · 81 km away
  32. 1.622 km ESE of Packwood, Washington · 16553 days ago · 1 km deep · 81 km away
  33. 1.921 km ESE of Packwood, Washington · 16552 days ago · 1 km deep · 81 km away
  34. 1.822 km ESE of Packwood, Washington · 16552 days ago · 3 km deep · 81 km away
  35. 1.721 km ESE of Packwood, Washington · 16552 days ago · 3 km deep · 81 km away
  36. 2.924 km ESE of Packwood, Washington · 16552 days ago · 7 km deep · 82 km away
  37. 1.722 km ESE of Packwood, Washington · 16551 days ago · 5 km deep · 82 km away
  38. 2.023 km ESE of Packwood, Washington · 16546 days ago · 5 km deep · 82 km away
  39. 1.738 km NNE of Amboy, Washington · 16546 days ago · -1 km deep · 10 km away
  40. 2.139 km NNE of Amboy, Washington · 16545 days ago · -1 km deep · 11 km away
  41. 1.6Washington · 16545 days ago · -1 km deep · 72 km away
  42. 1.929 km SW of Packwood, Washington · 16545 days ago · 0 km deep · 40 km away
  43. 1.621 km S of Morton, Washington · 16545 days ago · 10 km deep · 22 km away
  44. 2.138 km NNE of Amboy, Washington · 16545 days ago · -1 km deep · 10 km away
  45. 2.324 km S of Morton, Washington · 16544 days ago · 8 km deep · 20 km away
  46. 2.023 km ESE of Packwood, Washington · 16544 days ago · 5 km deep · 82 km away
  47. 2.022 km ESE of Packwood, Washington · 16543 days ago · 5 km deep · 82 km away
  48. 1.639 km NNE of Amboy, Washington · 16540 days ago · 0 km deep · 11 km away
  49. 1.721 km ENE of Ashford, Washington · 16539 days ago · 3 km deep · 85 km away
  50. 1.738 km NNE of Amboy, Washington · 16538 days ago · -1 km deep · 10 km away
  51. 1.638 km NNE of Amboy, Washington · 16536 days ago · -1 km deep · 11 km away
  52. 1.838 km S of Morton, Washington · 16536 days ago · 2 km deep · 12 km away
  53. 1.839 km SSE of Morton, Washington · 16535 days ago · -1 km deep · 12 km away
  54. 2.338 km NNE of Amboy, Washington · 16535 days ago · -1 km deep · 11 km away
  55. 1.620 km S of Morton, Washington · 16534 days ago · 8 km deep · 23 km away
  56. 2.524 km S of Morton, Washington · 16534 days ago · 8 km deep · 19 km away
  57. 2.538 km NNE of Amboy, Washington · 16534 days ago · -1 km deep · 11 km away
  58. 1.738 km NNE of Amboy, Washington · 16534 days ago · -1 km deep · 11 km away
  59. 2.138 km NNE of Amboy, Washington · 16534 days ago · 1 km deep · 11 km away
  60. 2.023 km ESE of Packwood, Washington · 16533 days ago · 6 km deep · 82 km away

The first 60 of 74.

Before

  1. 1.712 km SSW of Trout Lake, Washington · 16590 days ago · -1 km deep · 66 km away
  2. 2.021 km S of Morton, Washington · 16593 days ago · 10 km deep · 22 km away
  3. 2.123 km S of Morton, Washington · 16593 days ago · 11 km deep · 20 km away
  4. 1.831 km S of Morton, Washington · 16596 days ago · 3 km deep · 14 km away
  5. 1.734 km S of Morton, Washington · 16596 days ago · -1 km deep · 12 km away
  6. 1.731 km S of Morton, Washington · 16597 days ago · 2 km deep · 15 km away
  7. 2.423 km S of Morton, Washington · 16597 days ago · 8 km deep · 20 km away
  8. 1.937 km NNE of Amboy, Washington · 16598 days ago · 0 km deep · 10 km away
  9. 2.322 km S of Morton, Washington · 16599 days ago · 9 km deep · 21 km away
  10. 1.637 km NNE of Amboy, Washington · 16600 days ago · -1 km deep · 10 km away
  11. 2.039 km NNE of Amboy, Washington · 16600 days ago · -1 km deep · 11 km away
  12. 1.636 km NNE of Amboy, Washington · 16600 days ago · -1 km deep · 10 km away
  13. 1.938 km NNE of Amboy, Washington · 16600 days ago · 0 km deep · 10 km away
  14. 1.634 km NNE of Amboy, Washington · 16600 days ago · -1 km deep · 9 km away
  15. 1.537 km SSE of Morton, Washington · 16600 days ago · -1 km deep · 12 km away
  16. 2.538 km NNE of Amboy, Washington · 16600 days ago · -1 km deep · 12 km away
  17. 1.936 km NNE of Amboy, Washington · 16600 days ago · 0 km deep · 10 km away
  18. 1.737 km NNE of Amboy, Washington · 16600 days ago · 0 km deep · 10 km away
  19. 1.736 km NNE of Amboy, Washington · 16600 days ago · 1 km deep · 9 km away
  20. 1.837 km NNE of Amboy, Washington · 16600 days ago · -1 km deep · 10 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10106233. Read Tue, Sep 22, 2026, 5:28 AM UTC.