Washington earthquakes

M2.1 earthquake 6 km ENE of Royal City, Washington

A magnitude 2.1 earthquake struck 6 km ENE of Royal City, Washington on Sun, Sep 23, 1979, 12:21 PM PDT (19:21 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.1 8 km N of Waterville, Washington. This one was a foreshock.

Royal City 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
1979-09-23 19:21:58 UTC
Depth
0.2 km (0.1 mi), shallow
Epicenter
46.931° N, 119.550° 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 0.0 km horizontally, 0.1 km in depth
Magnitude uncertainty
±0.08
Depth from
Operator assigned
Station coverage gap
80°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 35 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.95 km NE of Royal City, Washington · 17154 days ago · 5 km deep · 2 km away
  2. 2.13 km NNE of Royal City, Washington · 17154 days ago · 5 km deep · 4 km away
  3. 1.65 km NE of Royal City, Washington · 17154 days ago · 0 km deep · 1 km away
  4. 1.66 km ENE of Royal City, Washington · 17153 days ago · 4 km deep · 1 km away
  5. 1.76 km NE of Royal City, Washington · 17153 days ago · 0 km deep · 2 km away
  6. 2.04 km ENE of Royal City, Washington · 17133 days ago · 3 km deep · 2 km away
  7. 1.66 km SE of Quincy, Washington · 17132 days ago · 0 km deep · 34 km away
  8. 1.85 km ENE of Royal City, Washington · 17127 days ago · 1 km deep · 2 km away
  9. 1.94 km ENE of Royal City, Washington · 17127 days ago · 4 km deep · 2 km away
  10. 1.64 km ENE of Royal City, Washington · 17125 days ago · 0 km deep · 3 km away
  11. 1.528 km NNW of Benton City, Washington · 17125 days ago · 5 km deep · 49 km away
  12. 1.54 km ENE of Royal City, Washington · 17119 days ago · 0 km deep · 2 km away
  13. 3.18 km N of Waterville, Washington · 17119 days ago · 3 km deep · 97 km away
  14. 1.73 km ENE of Royal City, Washington · 17119 days ago · 2 km deep · 3 km away
  15. 2.717 km ESE of Mansfield, Washington · 17118 days ago · -1 km deep · 93 km away
  16. 1.517 km ESE of Mansfield, Washington · 17118 days ago · 1 km deep · 93 km away
  17. 1.617 km ESE of Mansfield, Washington · 17118 days ago · 0 km deep · 93 km away
  18. 1.717 km ESE of Mansfield, Washington · 17118 days ago · 0 km deep · 93 km away
  19. 1.817 km ESE of Mansfield, Washington · 17118 days ago · 0 km deep · 94 km away
  20. 1.73 km ENE of Royal City, Washington · 17117 days ago · 5 km deep · 3 km away
  21. 2.74 km NE of Royal City, Washington · 17117 days ago · 3 km deep · 3 km away
  22. 1.73 km ENE of Royal City, Washington · 17117 days ago · 5 km deep · 4 km away
  23. 1.83 km ENE of Royal City, Washington · 17117 days ago · 3 km deep · 3 km away
  24. 2.117 km ESE of Mansfield, Washington · 17112 days ago · 0 km deep · 93 km away
  25. 1.64 km NE of Royal City, Washington · 17112 days ago · 4 km deep · 3 km away
  26. 2.04 km ENE of Royal City, Washington · 17112 days ago · 0 km deep · 3 km away
  27. 2.03 km ENE of Royal City, Washington · 17111 days ago · 5 km deep · 3 km away
  28. 1.55 km NE of Royal City, Washington · 17111 days ago · 2 km deep · 3 km away
  29. 2.85 km ESE of Royal City, Washington · 17111 days ago · 3 km deep · 5 km away
  30. 1.84 km NE of Royal City, Washington · 17111 days ago · 5 km deep · 3 km away
  31. 1.54 km ENE of Royal City, Washington · 17110 days ago · 0 km deep · 2 km away
  32. 1.56 km NE of Royal City, Washington · 17110 days ago · 0 km deep · 3 km away
  33. 2.85 km ENE of Royal City, Washington · 17108 days ago · 1 km deep · 2 km away
  34. 1.74 km NE of Royal City, Washington · 17108 days ago · 0 km deep · 2 km away
  35. 2.64 km NE of Royal City, Washington · 17107 days ago · 2 km deep · 3 km away

Before

  1. 1.74 km E of Royal City, Washington · 17173 days ago · 0 km deep · 3 km away
  2. 2.128 km SE of Desert Aire, Washington · 17181 days ago · 3 km deep · 49 km away
  3. 1.628 km NNW of Benton City, Washington · 17182 days ago · 5 km deep · 50 km away
  4. 1.827 km NNW of Benton City, Washington · 17182 days ago · 4 km deep · 50 km away
  5. 2.527 km NNW of Benton City, Washington · 17182 days ago · 4 km deep · 50 km away
  6. 1.527 km NNW of Benton City, Washington · 17185 days ago · 4 km deep · 50 km away
  7. 2.210 km SSE of Royal City, Washington · 17186 days ago · 3 km deep · 12 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10850708. Read Wed, Sep 23, 2026, 9:24 AM UTC.