Washington earthquakes

M1.8 earthquake 19 km SSE of Prosser, Washington

A magnitude 1.8 earthquake struck 19 km SSE of Prosser, Washington on Sat, Dec 29, 1973, 3:03 AM PST (11:03 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.8 (md), micro
Local time
UTC
1973-12-29 11:03:08 UTC
Depth
9.6 km (5.9 mi), shallow
Epicenter
46.039° N, 119.678° 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, 0.6 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
248°, poorly surrounded by stations
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.319 km SSE of Prosser, Washington · 19267 days ago · 10 km deep · 1 km away
  2. 1.612 km NNE of Basin City, Washington · 19260 days ago · 1 km deep · 86 km away
  3. 2.714 km WNW of Othello, Washington · 19258 days ago · 0 km deep · 96 km away
  4. 1.516 km WNW of Othello, Washington · 19258 days ago · 0 km deep · 94 km away
  5. 1.614 km WSW of Othello, Washington · 19256 days ago · 1 km deep · 87 km away
  6. 2.013 km NNE of Basin City, Washington · 19243 days ago · 3 km deep · 87 km away
  7. 1.815 km WNW of Othello, Washington · 19242 days ago · 2 km deep · 95 km away
  8. 1.66 km S of Royal City, Washington · 19229 days ago · 0 km deep · 89 km away
  9. 1.614 km WNW of Othello, Washington · 19226 days ago · 0 km deep · 96 km away
  10. 2.34 km NE of Prosser, Washington · 19219 days ago · 0 km deep · 22 km away
  11. 2.24 km NE of Prosser, Washington · 19214 days ago · 0 km deep · 22 km away

Before

  1. 2.019 km SSE of Prosser, Washington · 19267 days ago · 10 km deep · 0 km away
  2. 2.819 km SSE of Prosser, Washington · 19267 days ago · 11 km deep · 2 km away
  3. 1.820 km SSE of Prosser, Washington · 19267 days ago · 9 km deep · 0 km away
  4. 1.714 km WNW of Othello, Washington · 19274 days ago · 3 km deep · 95 km away
  5. 2.014 km WNW of Othello, Washington · 19277 days ago · 1 km deep · 96 km away
  6. 4.414 km WNW of Othello, Washington · 19277 days ago · 3 km deep · 95 km away
  7. 1.83 km SW of West Richland, Washington · 19291 days ago · 0 km deep · 35 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10858033. Read Tue, Sep 29, 2026, 5:28 PM UTC.