Washington earthquakes

M3.1 earthquake 6 km S of Ahtanum, Washington

A magnitude 3.1 earthquake struck 6 km S of Ahtanum, Washington on Thu, Jan 24, 1985, 11:28 PM PST (07:28 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M3.3 14 km NNW of Vantage, Washington. This one was a foreshock.

Ahtanum 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
3.1 (Md, duration), minor
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1985-01-25 07:28:54 UTC
Depth
15.8 km (9.8 mi), shallow
Epicenter
46.500° N, 120.632° 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 1.0 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
81°
Stations used
33

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 3.314 km NNW of Vantage, Washington · 15219 days ago · 0 km deep · 75 km away
  2. 2.76 km NW of Desert Aire, Washington · 15218 days ago · 4 km deep · 55 km away
  3. 1.99 km NW of Vantage, Washington · 15218 days ago · 0 km deep · 71 km away
  4. 1.86 km NW of Desert Aire, Washington · 15218 days ago · 3 km deep · 55 km away
  5. 1.624 km SE of Kittitas, Washington · 15217 days ago · 1 km deep · 46 km away
  6. 2.314 km NNW of Vantage, Washington · 15217 days ago · 0 km deep · 75 km away
  7. 2.67 km WSW of Mattawa, Washington · 15216 days ago · 6 km deep · 55 km away
  8. 2.315 km NW of Vantage, Washington · 15216 days ago · 9 km deep · 74 km away
  9. 2.316 km NW of Benton City, Washington · 15209 days ago · 19 km deep · 79 km away
  10. 2.114 km SE of Kittitas, Washington · 15201 days ago · 4 km deep · 50 km away
  11. 2.6Washington · 15188 days ago · 5 km deep · 40 km away
  12. 1.915 km NNW of Vantage, Washington · 15176 days ago · -1 km deep · 75 km away
  13. 2.314 km SSW of Vantage, Washington · 15169 days ago · 3 km deep · 56 km away

Before

  1. 1.73 km SW of Easton, Washington · 15229 days ago · 4 km deep · 92 km away
  2. 1.92 km SW of Easton, Washington · 15234 days ago · 5 km deep · 91 km away
  3. 1.921 km S of Royal City, Washington · 15236 days ago · 0 km deep · 84 km away
  4. 1.812 km NNW of Vantage, Washington · 15240 days ago · 0 km deep · 73 km away
  5. 2.113 km NNW of Vantage, Washington · 15241 days ago · 0 km deep · 75 km away
  6. 3.315 km NNW of Vantage, Washington · 15241 days ago · 0 km deep · 75 km away
  7. 1.813 km NNW of Vantage, Washington · 15241 days ago · 0 km deep · 74 km away
  8. 2.814 km NNW of Vantage, Washington · 15241 days ago · 0 km deep · 75 km away
  9. 2.814 km NNW of Vantage, Washington · 15241 days ago · 0 km deep · 74 km away
  10. 1.825 km SW of Vantage, Washington · 15242 days ago · 16 km deep · 44 km away
  11. 1.624 km SW of Vantage, Washington · 15242 days ago · 14 km deep · 45 km away
  12. 1.623 km ENE of Ashford, Washington · 15246 days ago · 0 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10189033. Read Thu, Oct 1, 2026, 9:22 PM UTC.