Washington earthquakes

M3.3 earthquake 12 km SSE of Prosser, Washington

A magnitude 3.3 earthquake struck 12 km SSE of Prosser, Washington on Sat, Jun 28, 1975, 9:33 AM PDT (16:33 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M3.8 12 km SSE of Prosser, Washington. This one was a foreshock.

Prosser 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
3.3 (md), minor
Local time
UTC
1975-06-28 16:33:43 UTC
Depth
8.8 km (5.5 mi), shallow
Epicenter
46.105° N, 119.704° 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 1.5 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
261°, poorly surrounded by stations
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 2.412 km SSE of Prosser, Washington · 18720 days ago · 10 km deep · 1 km away
  2. 1.511 km SE of Prosser, Washington · 18720 days ago · 9 km deep · 3 km away
  3. 2.011 km SE of Prosser, Washington · 18720 days ago · 8 km deep · 4 km away
  4. 3.812 km SSE of Prosser, Washington · 18720 days ago · 10 km deep · 1 km away
  5. 2.713 km SSE of Prosser, Washington · 18720 days ago · 9 km deep · 2 km away
  6. 1.510 km SSE of Prosser, Washington · 18720 days ago · 9 km deep · 2 km away
  7. 2.213 km SSE of Prosser, Washington · 18720 days ago · 9 km deep · 2 km away
  8. 2.215 km S of Prosser, Washington · 18719 days ago · 9 km deep · 5 km away
  9. 1.615 km W of Othello, Washington · 18718 days ago · 0 km deep · 83 km away
  10. 3.618 km NW of Ione, Oregon · 18718 days ago · 15 km deep · 61 km away
  11. 3.518 km ESE of Arlington, Oregon · 18718 days ago · 5 km deep · 58 km away
  12. 2.215 km NNE of West Richland, Washington · 18701 days ago · 0 km deep · 49 km away
  13. 1.87 km SSW of Mesa, Washington · 18699 days ago · 17 km deep · 68 km away
  14. 2.24 km SSW of West Richland, Washington · 18695 days ago · 0 km deep · 30 km away

Before

  1. 2.011 km ESE of Prosser, Washington · 18720 days ago · 6 km deep · 8 km away
  2. 1.9Washington · 18723 days ago · 0 km deep · 48 km away
  3. 2.10 km E of Pasco, Washington · 18731 days ago · 1 km deep · 49 km away
  4. 1.92 km W of Pasco, Washington · 18732 days ago · 3 km deep · 47 km away
  5. 2.529 km ESE of Desert Aire, Washington · 18732 days ago · 4 km deep · 58 km away
  6. 2.1Washington · 18733 days ago · 0 km deep · 49 km away
  7. 3.11 km WSW of Pasco, Washington · 18733 days ago · 1 km deep · 48 km away
  8. 2.316 km NNE of West Richland, Washington · 18733 days ago · 0 km deep · 49 km away
  9. 1.516 km NNE of West Richland, Washington · 18734 days ago · 0 km deep · 49 km away
  10. 1.617 km NNE of West Richland, Washington · 18741 days ago · 0 km deep · 51 km away
  11. 1.515 km NNE of West Richland, Washington · 18741 days ago · 0 km deep · 49 km away
  12. 2.315 km NNE of West Richland, Washington · 18742 days ago · 1 km deep · 49 km away
  13. 1.86 km NE of Mattawa, Washington · 18742 days ago · 0 km deep · 77 km away
  14. 1.515 km NNE of West Richland, Washington · 18744 days ago · 1 km deep · 49 km away
  15. 2.215 km NNE of West Richland, Washington · 18745 days ago · 2 km deep · 49 km away
  16. 1.615 km NNE of West Richland, Washington · 18749 days ago · 0 km deep · 49 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10861113. Read Mon, Sep 28, 2026, 8:52 PM UTC.