Washington earthquakes

M2.1 earthquake 2 km NNE of Riverton, Washington

A magnitude 2.1 earthquake struck 2 km NNE of Riverton, Washington on Thu, Jul 3, 1975, 2:42 AM PDT (09:42 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M3.4 2 km E of Dash Point, Washington. This one was a foreshock.

Riverton 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
2.1 (md), micro
Local time
UTC
1975-07-03 09:42:19 UTC
Depth
27.5 km (17.1 mi), shallow
Epicenter
47.504° N, 122.281° 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 0.8 km horizontally, 1.0 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
101°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 2.62 km E of Dash Point, Washington · 18716 days ago · 16 km deep · 23 km away
  2. 2.25 km WSW of North Bend, Washington · 18712 days ago · 8 km deep · 32 km away
  3. 2.113 km SE of Verlot, Washington · 18711 days ago · -1 km deep · 74 km away
  4. 2.27 km N of Brinnon, Washington · 18711 days ago · 14 km deep · 54 km away
  5. 2.63 km SE of Southworth, Washington · 18708 days ago · 47 km deep · 14 km away
  6. 2.07 km SSW of Wilderness Rim, Washington · 18708 days ago · 13 km deep · 39 km away
  7. 1.56 km NE of Bryant, Washington · 18708 days ago · 11 km deep · 88 km away
  8. 3.42 km E of Dash Point, Washington · 18706 days ago · 7 km deep · 22 km away
  9. 1.92 km ENE of Dash Point, Washington · 18706 days ago · 8 km deep · 22 km away
  10. 2.22 km S of Startup, Washington · 18701 days ago · -1 km deep · 55 km away
  11. 1.84 km SSE of Monroe, Washington · 18701 days ago · 12 km deep · 42 km away
  12. 3.42 km NE of Dash Point, Washington · 18696 days ago · 7 km deep · 21 km away
  13. 2.424 km NE of Ashford, Washington · 18684 days ago · 5 km deep · 79 km away
  14. 1.82 km ESE of Silverdale, Washington · 18684 days ago · 21 km deep · 32 km away
  15. 1.87 km NE of Brinnon, Washington · 18677 days ago · 14 km deep · 49 km away
  16. 1.93 km E of Keyport, Washington · 18677 days ago · 14 km deep · 31 km away
  17. 1.83 km E of Keyport, Washington · 18677 days ago · 15 km deep · 32 km away
  18. 1.53 km NW of Chico, Washington · 18676 days ago · 8 km deep · 37 km away
  19. 1.74 km NW of Oso, Washington · 18676 days ago · 8 km deep · 91 km away
  20. 1.59 km SSW of Seabeck, Washington · 18673 days ago · 14 km deep · 47 km away
  21. 1.915 km SSW of Blyn, Washington · 18667 days ago · 39 km deep · 77 km away
  22. 2.42 km W of Fall City, Washington · 18667 days ago · 5 km deep · 28 km away
  23. 2.22 km N of Union Hill-Novelty Hill, Washington · 18667 days ago · 18 km deep · 29 km away
  24. 3.06 km N of Olympia, Washington · 18665 days ago · 43 km deep · 65 km away
  25. 2.04 km WSW of Snoqualmie, Washington · 18664 days ago · 22 km deep · 30 km away
  26. 2.36 km E of Marrowstone, Washington · 18664 days ago · 24 km deep · 65 km away
  27. 2.36 km SSE of Baring, Washington · 18664 days ago · 15 km deep · 66 km away
  28. 2.14 km NE of Carnation, Washington · 18663 days ago · 9 km deep · 36 km away
  29. 2.02 km SW of Snoqualmie, Washington · 18662 days ago · -1 km deep · 32 km away
  30. 1.613 km NNE of Greenwater, Washington · 18661 days ago · 16 km deep · 57 km away
  31. 2.53 km N of Kingston, Washington · 18659 days ago · 23 km deep · 40 km away

Before

  1. 2.0Puget Sound region, Washington · 18719 days ago · 11 km deep · 22 km away
  2. 1.92 km S of Lake Marcel-Stillwater, Washington · 18719 days ago · 18 km deep · 33 km away
  3. 2.10 km NE of Navy Yard City, Washington · 18719 days ago · 22 km deep · 29 km away
  4. 2.52 km W of North Bend, Washington · 18720 days ago · 16 km deep · 35 km away
  5. 2.02 km ESE of Duvall, Washington · 18720 days ago · 16 km deep · 35 km away
  6. 2.3Puget Sound region, Washington · 18720 days ago · 18 km deep · 26 km away
  7. 1.90 km E of Gorst, Washington · 18721 days ago · 18 km deep · 31 km away
  8. 1.94 km ENE of Hobart, Washington · 18724 days ago · 15 km deep · 29 km away
  9. 1.92 km NW of Carlsborg, Washington · 18728 days ago · 45 km deep · 96 km away
  10. 1.62 km ESE of Lake Cavanaugh, Washington · 18728 days ago · 9 km deep · 93 km away
  11. 1.61 km S of Wilburton, Washington · 18728 days ago · 17 km deep · 12 km away
  12. 1.72 km W of Suquamish, Washington · 18737 days ago · 3 km deep · 34 km away
  13. 1.51 km SW of Lynnwood, Washington · 18740 days ago · 5 km deep · 34 km away
  14. 1.74 km WSW of Woodway, Washington · 18742 days ago · 12 km deep · 33 km away
  15. 1.71 km ENE of Quilcene, Washington · 18744 days ago · 48 km deep · 56 km away
  16. 1.92 km N of White Center, Washington · 18745 days ago · 22 km deep · 7 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10861218. Read Wed, Sep 30, 2026, 5:17 PM UTC.