Washington earthquakes

M1.7 earthquake 20 km S of Morton, Washington

A magnitude 1.7 earthquake struck 20 km S of Morton, Washington on Thu, Aug 30, 1984, 10:39 PM PDT (05:39 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.5 38 km NNE of Amboy, 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, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1984-08-31 05:39:37 UTC
Depth
7.6 km (4.7 mi), shallow
Epicenter
46.376° N, 122.249° 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, 0.3 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
82°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 62 in the 60 days after this one and 25 in the 30 days before it.

After

  1. 2.338 km NNE of Amboy, Washington · 15371 days ago · -1 km deep · 20 km away
  2. 2.438 km NNE of Amboy, Washington · 15371 days ago · -2 km deep · 19 km away
  3. 1.938 km NNE of Amboy, Washington · 15371 days ago · -1 km deep · 19 km away
  4. 1.638 km NNE of Amboy, Washington · 15370 days ago · -1 km deep · 20 km away
  5. 2.038 km NNE of Amboy, Washington · 15370 days ago · -1 km deep · 20 km away
  6. 1.538 km NNE of Amboy, Washington · 15369 days ago · -2 km deep · 19 km away
  7. 1.51 km SSE of Ridgefield, Washington · 15369 days ago · 10 km deep · 74 km away
  8. 1.638 km NNE of Amboy, Washington · 15368 days ago · -2 km deep · 20 km away
  9. 1.538 km NNE of Amboy, Washington · 15368 days ago · 0 km deep · 19 km away
  10. 1.538 km NNE of Amboy, Washington · 15368 days ago · -1 km deep · 20 km away
  11. 2.238 km NNE of Amboy, Washington · 15368 days ago · -1 km deep · 20 km away
  12. 1.638 km NNE of Amboy, Washington · 15368 days ago · -2 km deep · 19 km away
  13. 1.9Washington · 15367 days ago · -1 km deep · 19 km away
  14. 1.638 km NNE of Amboy, Washington · 15367 days ago · -1 km deep · 19 km away
  15. 1.938 km NNE of Amboy, Washington · 15367 days ago · -1 km deep · 20 km away
  16. 1.812 km WNW of Greenwater, Washington · 15367 days ago · 16 km deep · 99 km away
  17. 2.138 km NNE of Amboy, Washington · 15367 days ago · -1 km deep · 20 km away
  18. 1.538 km NNE of Amboy, Washington · 15366 days ago · -1 km deep · 20 km away
  19. 1.538 km NNE of Amboy, Washington · 15365 days ago · -2 km deep · 20 km away
  20. 1.838 km NNE of Amboy, Washington · 15365 days ago · 0 km deep · 20 km away
  21. 2.538 km NNE of Amboy, Washington · 15364 days ago · -2 km deep · 19 km away
  22. 1.738 km NNE of Amboy, Washington · 15363 days ago · -2 km deep · 20 km away
  23. 1.838 km NNE of Amboy, Washington · 15363 days ago · -2 km deep · 20 km away
  24. 1.738 km NNE of Amboy, Washington · 15363 days ago · -1 km deep · 19 km away
  25. 1.838 km NNE of Amboy, Washington · 15363 days ago · -2 km deep · 19 km away
  26. 1.837 km NNE of Amboy, Washington · 15363 days ago · 0 km deep · 20 km away
  27. 1.838 km NNE of Amboy, Washington · 15362 days ago · -2 km deep · 19 km away
  28. 1.538 km NNE of Amboy, Washington · 15362 days ago · -1 km deep · 19 km away
  29. 1.738 km NNE of Amboy, Washington · 15362 days ago · -1 km deep · 19 km away
  30. 1.538 km NNE of Amboy, Washington · 15362 days ago · -1 km deep · 19 km away
  31. 1.838 km NNE of Amboy, Washington · 15362 days ago · -1 km deep · 20 km away
  32. 1.738 km NNE of Amboy, Washington · 15362 days ago · -2 km deep · 19 km away
  33. 1.838 km NNE of Amboy, Washington · 15362 days ago · -2 km deep · 19 km away
  34. 1.838 km NNE of Amboy, Washington · 15362 days ago · -1 km deep · 20 km away
  35. 1.838 km NNE of Amboy, Washington · 15362 days ago · -2 km deep · 19 km away
  36. 2.038 km NNE of Amboy, Washington · 15362 days ago · -2 km deep · 19 km away
  37. 2.138 km NNE of Amboy, Washington · 15362 days ago · -1 km deep · 20 km away
  38. 2.238 km NNE of Amboy, Washington · 15361 days ago · -2 km deep · 19 km away
  39. 2.437 km NNE of Amboy, Washington · 15361 days ago · -1 km deep · 20 km away
  40. 2.037 km NNE of Amboy, Washington · 15361 days ago · -1 km deep · 20 km away
  41. 2.437 km NNE of Amboy, Washington · 15361 days ago · -2 km deep · 19 km away
  42. 2.238 km NNE of Amboy, Washington · 15360 days ago · -2 km deep · 19 km away
  43. 1.94 km ESE of Carbonado, Washington · 15358 days ago · 1 km deep · 79 km away
  44. 1.96 km NNE of Packwood, Washington · 15355 days ago · 6 km deep · 56 km away
  45. 2.17 km E of Kapowsin, Washington · 15354 days ago · 19 km deep · 68 km away
  46. 2.037 km NNE of Amboy, Washington · 15350 days ago · -1 km deep · 19 km away
  47. 2.13 km S of South Prairie, Washington · 15347 days ago · 7 km deep · 83 km away
  48. 1.837 km NNE of Amboy, Washington · 15340 days ago · 1 km deep · 21 km away
  49. 2.338 km NNE of Amboy, Washington · 15339 days ago · -2 km deep · 19 km away
  50. 1.525 km S of Morton, Washington · 15335 days ago · 8 km deep · 5 km away
  51. 1.95 km ESE of Packwood, Washington · 15334 days ago · 2 km deep · 56 km away
  52. 2.138 km NNE of Amboy, Washington · 15331 days ago · -2 km deep · 19 km away
  53. 1.529 km S of Mossyrock, Washington · 15326 days ago · 15 km deep · 20 km away
  54. 1.738 km NNE of Amboy, Washington · 15325 days ago · -2 km deep · 19 km away
  55. 2.06 km E of Ashford, Washington · 15324 days ago · 5 km deep · 48 km away
  56. 1.541 km SSE of Morton, Washington · 15323 days ago · 9 km deep · 25 km away
  57. 1.638 km NNE of Amboy, Washington · 15322 days ago · -2 km deep · 19 km away
  58. 1.537 km SSE of Morton, Washington · 15322 days ago · 9 km deep · 18 km away
  59. 2.015 km SSW of Clatskanie, Oregon · 15321 days ago · 54 km deep · 93 km away
  60. 1.538 km NNE of Amboy, Washington · 15320 days ago · -2 km deep · 19 km away

The first 60 of 62.

Before

  1. 1.838 km NNE of Amboy, Washington · 15372 days ago · -1 km deep · 19 km away
  2. 2.438 km NNE of Amboy, Washington · 15372 days ago · -1 km deep · 20 km away
  3. 1.638 km NNE of Amboy, Washington · 15372 days ago · -1 km deep · 20 km away
  4. 1.538 km NNE of Amboy, Washington · 15372 days ago · -1 km deep · 20 km away
  5. 1.838 km NNE of Amboy, Washington · 15372 days ago · -2 km deep · 20 km away
  6. 1.638 km NNE of Amboy, Washington · 15373 days ago · -1 km deep · 19 km away
  7. 2.338 km NNE of Amboy, Washington · 15375 days ago · -1 km deep · 20 km away
  8. 1.938 km NNE of Amboy, Washington · 15376 days ago · -1 km deep · 20 km away
  9. 2.22 km ENE of Brush Prairie, Washington · 15377 days ago · 15 km deep · 74 km away
  10. 2.037 km NNE of Amboy, Washington · 15378 days ago · -1 km deep · 20 km away
  11. 2.337 km NNE of Amboy, Washington · 15378 days ago · -1 km deep · 20 km away
  12. 1.538 km NNE of Amboy, Washington · 15378 days ago · -2 km deep · 20 km away
  13. 1.938 km NE of Amboy, Washington · 15379 days ago · -2 km deep · 21 km away
  14. 2.038 km NNE of Amboy, Washington · 15384 days ago · -2 km deep · 20 km away
  15. 1.738 km NNE of Amboy, Washington · 15386 days ago · -2 km deep · 19 km away
  16. 2.337 km NNE of Amboy, Washington · 15386 days ago · -1 km deep · 20 km away
  17. 1.838 km NNE of Amboy, Washington · 15386 days ago · -1 km deep · 19 km away
  18. 1.838 km NNE of Amboy, Washington · 15389 days ago · -1 km deep · 20 km away
  19. 1.838 km NNE of Amboy, Washington · 15389 days ago · -2 km deep · 19 km away
  20. 2.138 km NNE of Amboy, Washington · 15390 days ago · -1 km deep · 20 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10183878. Read Thu, Oct 1, 2026, 4:17 PM UTC.