Washington earthquakes

M1.9 earthquake 21 km SSE of Greenwater, Washington

A magnitude 1.9 earthquake struck 21 km SSE of Greenwater, Washington on Thu, Apr 28, 1983, 3:04 AM PDT (10:04 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.1 2 km NW of Terrace Heights, Washington. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.9 (md), micro
Local time
UTC
1983-04-28 10:04:20 UTC
Depth
5.7 km (3.5 mi), shallow
Epicenter
46.996° N, 121.500° 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 0.9 km horizontally, 1.6 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
75°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 41 in the 60 days after this one and 21 in the 30 days before it.

After

  1. 1.521 km SE of Greenwater, Washington · 15851 days ago · 6 km deep · 2 km away
  2. 1.61 km E of Maple Valley, Washington · 15850 days ago · 13 km deep · 59 km away
  3. 1.74 km SSE of Carnation, Washington · 15847 days ago · 14 km deep · 75 km away
  4. 1.61 km ESE of Inglewood-Finn Hill, Washington · 15846 days ago · 24 km deep · 96 km away
  5. 2.12 km NW of Terrace Heights, Washington · 15846 days ago · 7 km deep · 90 km away
  6. 2.322 km S of Morton, Washington · 15846 days ago · 6 km deep · 90 km away
  7. 2.29 km WNW of Snoqualmie Pass, Washington · 15844 days ago · 9 km deep · 48 km away
  8. 1.90 km SW of Lakeland South, Washington · 15844 days ago · 15 km deep · 67 km away
  9. 2.022 km SE of Greenwater, Washington · 15843 days ago · 6 km deep · 2 km away
  10. 1.52 km ENE of Manchester, Washington · 15840 days ago · 24 km deep · 99 km away
  11. 1.57 km ENE of Ashford, Washington · 15840 days ago · 5 km deep · 42 km away
  12. 1.711 km WSW of Tieton, Washington · 15840 days ago · 0 km deep · 59 km away
  13. 1.83 km WSW of Wauna, Washington · 15836 days ago · 20 km deep · 99 km away
  14. 2.03 km SSW of Southworth, Washington · 15835 days ago · 24 km deep · 94 km away
  15. 2.07 km WSW of Seattle, Washington · 15833 days ago · 23 km deep · 96 km away
  16. 1.522 km S of Morton, Washington · 15832 days ago · 8 km deep · 91 km away
  17. 2.812 km S of Snoqualmie Pass, Washington · 15831 days ago · 11 km deep · 33 km away
  18. 1.928 km SSE of Mossyrock, Washington · 15831 days ago · 8 km deep · 99 km away
  19. 1.81 km SE of Inglewood-Finn Hill, Washington · 15831 days ago · 23 km deep · 96 km away
  20. 1.71 km ESE of Inglewood-Finn Hill, Washington · 15830 days ago · 25 km deep · 96 km away
  21. 3.08 km SW of Index, Washington · 15827 days ago · 10 km deep · 87 km away
  22. 2.00 km W of Fall City, Washington · 15825 days ago · 2 km deep · 70 km away
  23. 2.018 km SSW of Greenwater, Washington · 15824 days ago · 18 km deep · 19 km away
  24. 2.015 km ENE of Cliffdell, Washington · 15822 days ago · 6 km deep · 47 km away
  25. 1.734 km SSE of Morton, Washington · 15822 days ago · 0 km deep · 98 km away
  26. 3.13 km W of Redmond, Washington · 15819 days ago · 23 km deep · 90 km away
  27. 2.44 km N of Dash Point, Washington · 15819 days ago · 19 km deep · 80 km away
  28. 1.61 km ESE of Inglewood-Finn Hill, Washington · 15819 days ago · 25 km deep · 96 km away
  29. 1.92 km WNW of Vashon, Washington · 15816 days ago · 23 km deep · 90 km away
  30. 1.53 km SW of Baring, Washington · 15814 days ago · 12 km deep · 84 km away
  31. 2.011 km SE of Snoqualmie Pass, Washington · 15811 days ago · 7 km deep · 38 km away
  32. 1.54 km E of Baring, Washington · 15810 days ago · 0 km deep · 86 km away
  33. 1.724 km S of Morton, Washington · 15810 days ago · 9 km deep · 92 km away
  34. 1.62 km ESE of Dash Point, Washington · 15809 days ago · 6 km deep · 76 km away
  35. 1.76 km ESE of Wilkeson, Washington · 15809 days ago · 12 km deep · 37 km away
  36. 1.82 km SW of Black Diamond, Washington · 15801 days ago · 13 km deep · 52 km away
  37. 1.616 km SW of Alder, Washington · 15799 days ago · -1 km deep · 79 km away
  38. 1.83 km S of Issaquah, Washington · 15798 days ago · -1 km deep · 69 km away
  39. 2.117 km S of Morton, Washington · 15798 days ago · 1 km deep · 88 km away
  40. 1.832 km SSW of Packwood, Washington · 15795 days ago · 11 km deep · 77 km away
  41. 2.04 km ENE of Hobart, Washington · 15794 days ago · -1 km deep · 58 km away

Before

  1. 2.724 km ESE of Packwood, Washington · 15857 days ago · 4 km deep · 54 km away
  2. 1.716 km SSW of Greenwater, Washington · 15860 days ago · -1 km deep · 15 km away
  3. 1.78 km SSW of Baring, Washington · 15860 days ago · 85 km deep · 79 km away
  4. 2.322 km S of Morton, Washington · 15862 days ago · 8 km deep · 91 km away
  5. 2.322 km S of Morton, Washington · 15862 days ago · 8 km deep · 91 km away
  6. 1.88 km SSE of Leavenworth, Washington · 15869 days ago · 7 km deep · 88 km away
  7. 2.021 km S of Morton, Washington · 15869 days ago · 7 km deep · 90 km away
  8. 1.522 km S of Morton, Washington · 15869 days ago · 9 km deep · 91 km away
  9. 1.78 km S of Leavenworth, Washington · 15870 days ago · 1 km deep · 87 km away
  10. 1.74 km SW of Seattle, Washington · 15871 days ago · 24 km deep · 93 km away
  11. 1.71 km S of Lakeland North, Washington · 15873 days ago · 1 km deep · 69 km away
  12. 1.812 km NW of Packwood, Washington · 15873 days ago · 7 km deep · 42 km away
  13. 1.95 km S of Monroe, Washington · 15874 days ago · -1 km deep · 97 km away
  14. 1.98 km NE of Mossyrock, Washington · 15874 days ago · 15 km deep · 83 km away
  15. 1.97 km NE of North Bend, Washington · 15875 days ago · -1 km deep · 64 km away
  16. 1.52 km N of Skykomish, Washington · 15876 days ago · 1 km deep · 82 km away
  17. 1.913 km E of Wilkeson, Washington · 15877 days ago · 9 km deep · 30 km away
  18. 1.80 km E of Clyde Hill, Washington · 15878 days ago · 23 km deep · 89 km away
  19. 2.710 km NNE of Snoqualmie, Washington · 15879 days ago · 12 km deep · 71 km away
  20. 1.61 km N of Ames Lake, Washington · 15882 days ago · 69 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10167868. Read Tue, Sep 22, 2026, 10:30 PM UTC.