Washington earthquakes

M1.5 earthquake 1 km W of Machias, Washington

A magnitude 1.5 earthquake struck 1 km W of Machias, Washington on Fri, May 20, 1983, 4:28 PM PDT (23:28 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M2.8 12 km S of Snoqualmie Pass, Washington. This one was a foreshock.

Machias 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
1983-05-20 23:28:26 UTC
Depth
2.4 km (1.5 mi), shallow
Epicenter
47.984° N, 122.067° 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 4.1 km horizontally, 14.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
139°
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: 49 in the 60 days after this one and 30 in the 30 days before it.

After

  1. 2.812 km S of Snoqualmie Pass, Washington · 15831 days ago · 11 km deep · 92 km away
  2. 1.81 km SE of Inglewood-Finn Hill, Washington · 15831 days ago · 23 km deep · 32 km away
  3. 1.71 km ESE of Inglewood-Finn Hill, Washington · 15830 days ago · 25 km deep · 32 km away
  4. 1.53 km ENE of Belfair, Washington · 15829 days ago · 9 km deep · 79 km away
  5. 3.08 km SW of Index, Washington · 15827 days ago · 10 km deep · 40 km away
  6. 2.320 km SSE of Marblemount, Washington · 15827 days ago · 0 km deep · 70 km away
  7. 2.00 km W of Fall City, Washington · 15825 days ago · 2 km deep · 48 km away
  8. 1.81 km ENE of Suquamish, Washington · 15825 days ago · 53 km deep · 45 km away
  9. 1.911 km NW of Coupeville, Washington · 15820 days ago · 21 km deep · 64 km away
  10. 3.13 km W of Redmond, Washington · 15819 days ago · 23 km deep · 35 km away
  11. 2.44 km N of Dash Point, Washington · 15819 days ago · 19 km deep · 74 km away
  12. 1.61 km ESE of Inglewood-Finn Hill, Washington · 15819 days ago · 25 km deep · 32 km away
  13. 2.02 km W of Port Angeles East, Washington · 15817 days ago · 37 km deep · 100 km away
  14. 1.92 km WNW of Vashon, Washington · 15816 days ago · 23 km deep · 67 km away
  15. 2.14 km NE of Lake Roesiger, Washington · 15815 days ago · 14 km deep · 14 km away
  16. 2.03 km NE of Lake Roesiger, Washington · 15815 days ago · 14 km deep · 13 km away
  17. 1.53 km SW of Baring, Washington · 15814 days ago · 12 km deep · 48 km away
  18. 1.74 km WSW of Shoreline, Washington · 15814 days ago · 19 km deep · 37 km away
  19. 1.64 km N of Bryant, Washington · 15812 days ago · 16 km deep · 33 km away
  20. 2.011 km SE of Snoqualmie Pass, Washington · 15811 days ago · 7 km deep · 94 km away
  21. 1.54 km E of Baring, Washington · 15810 days ago · 0 km deep · 53 km away
  22. 1.62 km ESE of Dash Point, Washington · 15809 days ago · 6 km deep · 79 km away
  23. 1.76 km ESE of Wilkeson, Washington · 15809 days ago · 12 km deep · 100 km away
  24. 1.512 km NE of Index, Washington · 15806 days ago · 1 km deep · 48 km away
  25. 1.65 km E of Ault Field, Washington · 15805 days ago · 23 km deep · 56 km away
  26. 2.010 km NW of Concrete, Washington · 15805 days ago · 0 km deep · 73 km away
  27. 1.78 km N of Belfair, Washington · 15805 days ago · 12 km deep · 76 km away
  28. 1.82 km SW of Black Diamond, Washington · 15801 days ago · 13 km deep · 77 km away
  29. 2.15 km S of Lake Roesiger, Washington · 15801 days ago · 15 km deep · 12 km away
  30. 1.83 km S of Issaquah, Washington · 15798 days ago · -1 km deep · 54 km away
  31. 2.04 km ENE of Hobart, Washington · 15794 days ago · -1 km deep · 62 km away
  32. 1.57 km ENE of Verlot, Washington · 15794 days ago · 8 km deep · 32 km away
  33. 1.51 km E of Roosevelt, Washington · 15793 days ago · 18 km deep · 11 km away
  34. 2.07 km E of Carnation, Washington · 15791 days ago · 11 km deep · 40 km away
  35. 2.127 km ESE of Glacier, Washington · 15790 days ago · -1 km deep · 98 km away
  36. 1.51 km ESE of Martha Lake, Washington · 15790 days ago · 20 km deep · 19 km away
  37. 2.32 km SE of Lake Marcel-Stillwater, Washington · 15789 days ago · 23 km deep · 37 km away
  38. 1.89 km S of Anacortes, Washington · 15786 days ago · 21 km deep · 65 km away
  39. 1.51 km NNW of Belfair, Washington · 15785 days ago · 24 km deep · 82 km away
  40. 2.13 km WNW of Orcas, Washington · 15784 days ago · 10 km deep · 97 km away
  41. 1.95 km ENE of Verlot, Washington · 15784 days ago · 13 km deep · 30 km away
  42. 1.78 km N of Sedro-Woolley, Washington · 15783 days ago · 12 km deep · 67 km away
  43. 2.45 km W of Brinnon, Washington · 15783 days ago · 47 km deep · 76 km away
  44. 2.00 km WSW of Port Ludlow, Washington · 15781 days ago · 55 km deep · 47 km away
  45. 1.84 km NNE of Fall City, Washington · 15780 days ago · 2 km deep · 45 km away
  46. 1.72 km SSE of Browns Point, Washington · 15780 days ago · 3 km deep · 83 km away
  47. 1.82 km ESE of Maltby, Washington · 15779 days ago · 22 km deep · 21 km away
  48. 2.54 km NNW of Verlot, Washington · 15777 days ago · 14 km deep · 25 km away
  49. 1.87 km SSE of Verlot, Washington · 15772 days ago · -1 km deep · 26 km away

Before

  1. 2.07 km WSW of Seattle, Washington · 15833 days ago · 23 km deep · 53 km away
  2. 2.03 km SSW of Southworth, Washington · 15835 days ago · 24 km deep · 65 km away
  3. 1.83 km WSW of Wauna, Washington · 15836 days ago · 20 km deep · 83 km away
  4. 2.14 km N of Bangor Trident Base, Washington · 15840 days ago · 18 km deep · 54 km away
  5. 1.52 km ENE of Manchester, Washington · 15840 days ago · 24 km deep · 57 km away
  6. 1.53 km WSW of Bainbridge Island, Washington · 15841 days ago · 18 km deep · 55 km away
  7. 1.61 km E of Indianola, Washington · 15843 days ago · 17 km deep · 42 km away
  8. 1.90 km SW of Lakeland South, Washington · 15844 days ago · 15 km deep · 81 km away
  9. 2.29 km WNW of Snoqualmie Pass, Washington · 15844 days ago · 9 km deep · 75 km away
  10. 1.61 km ESE of Inglewood-Finn Hill, Washington · 15846 days ago · 24 km deep · 32 km away
  11. 1.67 km N of Brinnon, Washington · 15846 days ago · 17 km deep · 67 km away
  12. 1.74 km SSE of Carnation, Washington · 15847 days ago · 14 km deep · 43 km away
  13. 2.96 km WSW of Lake Cavanaugh, Washington · 15848 days ago · 8 km deep · 36 km away
  14. 2.75 km N of Port Ludlow, Washington · 15849 days ago · 18 km deep · 46 km away
  15. 1.61 km E of Maple Valley, Washington · 15850 days ago · 13 km deep · 66 km away
  16. 1.813 km SSW of Bell Hill, Washington · 15850 days ago · 7 km deep · 82 km away
  17. 1.99 km NNE of Sedro-Woolley, Washington · 15850 days ago · 15 km deep · 68 km away
  18. 1.55 km NNE of Woods Creek, Washington · 15852 days ago · 14 km deep · 16 km away
  19. 2.014 km NNE of May Creek, Washington · 15852 days ago · 12 km deep · 37 km away
  20. 2.017 km ESE of Darrington, Washington · 15853 days ago · 2 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10166228. Read Tue, Sep 22, 2026, 10:32 PM UTC.