Washington earthquakes

M1.5 earthquake 10 km SSE of Prosser, Washington

A magnitude 1.5 earthquake struck 10 km SSE of Prosser, Washington on Sat, Jun 28, 1975, 4:58 PM PDT (23:58 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.6 18 km NW of Ione, Oregon. 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
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1975-06-28 23:58:49 UTC
Depth
9.4 km (5.8 mi), shallow
Epicenter
46.118° N, 119.711° 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, 0.9 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
289°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 22 in the 30 days before it.

After

  1. 2.213 km SSE of Prosser, Washington · 18725 days ago · 9 km deep · 4 km away
  2. 2.215 km S of Prosser, Washington · 18724 days ago · 9 km deep · 6 km away
  3. 1.615 km W of Othello, Washington · 18723 days ago · 0 km deep · 82 km away
  4. 3.618 km NW of Ione, Oregon · 18723 days ago · 15 km deep · 62 km away
  5. 3.518 km ESE of Arlington, Oregon · 18723 days ago · 5 km deep · 59 km away
  6. 2.215 km NNE of West Richland, Washington · 18706 days ago · 0 km deep · 48 km away
  7. 1.87 km SSW of Mesa, Washington · 18704 days ago · 17 km deep · 67 km away
  8. 2.24 km SSW of West Richland, Washington · 18700 days ago · 0 km deep · 30 km away

Before

  1. 2.713 km SSE of Prosser, Washington · 18725 days ago · 9 km deep · 3 km away
  2. 3.812 km SSE of Prosser, Washington · 18725 days ago · 10 km deep · 2 km away
  3. 2.011 km SE of Prosser, Washington · 18725 days ago · 8 km deep · 3 km away
  4. 1.511 km SE of Prosser, Washington · 18725 days ago · 9 km deep · 3 km away
  5. 2.412 km SSE of Prosser, Washington · 18725 days ago · 10 km deep · 2 km away
  6. 3.312 km SSE of Prosser, Washington · 18725 days ago · 9 km deep · 2 km away
  7. 2.011 km ESE of Prosser, Washington · 18725 days ago · 6 km deep · 7 km away
  8. 1.9Washington · 18728 days ago · 0 km deep · 47 km away
  9. 2.10 km E of Pasco, Washington · 18736 days ago · 1 km deep · 49 km away
  10. 1.92 km W of Pasco, Washington · 18737 days ago · 3 km deep · 47 km away
  11. 2.529 km ESE of Desert Aire, Washington · 18737 days ago · 4 km deep · 56 km away
  12. 2.1Washington · 18738 days ago · 0 km deep · 49 km away
  13. 3.11 km WSW of Pasco, Washington · 18738 days ago · 1 km deep · 48 km away
  14. 2.316 km NNE of West Richland, Washington · 18738 days ago · 0 km deep · 49 km away
  15. 1.516 km NNE of West Richland, Washington · 18739 days ago · 0 km deep · 49 km away
  16. 1.617 km NNE of West Richland, Washington · 18746 days ago · 0 km deep · 50 km away
  17. 1.515 km NNE of West Richland, Washington · 18746 days ago · 0 km deep · 48 km away
  18. 2.315 km NNE of West Richland, Washington · 18747 days ago · 1 km deep · 48 km away
  19. 1.86 km NE of Mattawa, Washington · 18747 days ago · 0 km deep · 75 km away
  20. 1.515 km NNE of West Richland, Washington · 18749 days ago · 1 km deep · 48 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10861148. Read Sat, Oct 3, 2026, 7:45 PM UTC.