Washington earthquakes

M2.3 earthquake 19 km SSE of Prosser, Washington

A magnitude 2.3 earthquake struck 19 km SSE of Prosser, Washington on Sat, Dec 29, 1973, 3:14 AM PST (11:14 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.7 14 km WNW of Othello, 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
2.3 (md), micro
Local time
UTC
1973-12-29 11:14:08 UTC
Depth
10.1 km (6.2 mi), shallow
Epicenter
46.043° N, 119.674° 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 1.9 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
247°, poorly surrounded by stations
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.612 km NNE of Basin City, Washington · 19253 days ago · 1 km deep · 85 km away
  2. 2.714 km WNW of Othello, Washington · 19251 days ago · 0 km deep · 95 km away
  3. 1.516 km WNW of Othello, Washington · 19250 days ago · 0 km deep · 93 km away
  4. 1.614 km WSW of Othello, Washington · 19249 days ago · 1 km deep · 87 km away
  5. 2.013 km NNE of Basin City, Washington · 19236 days ago · 3 km deep · 86 km away
  6. 1.815 km WNW of Othello, Washington · 19235 days ago · 2 km deep · 95 km away
  7. 1.66 km S of Royal City, Washington · 19222 days ago · 0 km deep · 89 km away
  8. 1.614 km WNW of Othello, Washington · 19219 days ago · 0 km deep · 95 km away
  9. 2.34 km NE of Prosser, Washington · 19212 days ago · 0 km deep · 22 km away
  10. 2.24 km NE of Prosser, Washington · 19207 days ago · 0 km deep · 22 km away

Before

  1. 1.819 km SSE of Prosser, Washington · 19260 days ago · 10 km deep · 1 km away
  2. 2.019 km SSE of Prosser, Washington · 19260 days ago · 10 km deep · 0 km away
  3. 2.819 km SSE of Prosser, Washington · 19260 days ago · 11 km deep · 1 km away
  4. 1.820 km SSE of Prosser, Washington · 19260 days ago · 9 km deep · 1 km away
  5. 1.714 km WNW of Othello, Washington · 19267 days ago · 3 km deep · 94 km away
  6. 2.014 km WNW of Othello, Washington · 19270 days ago · 1 km deep · 95 km away
  7. 4.414 km WNW of Othello, Washington · 19270 days ago · 3 km deep · 95 km away
  8. 1.83 km SW of West Richland, Washington · 19284 days ago · 0 km deep · 35 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10858038. Read Tue, Sep 22, 2026, 4:14 PM UTC.