Washington earthquakes

M1.7 earthquake 38 km S of Morton, Washington

A magnitude 1.7 earthquake struck 38 km S of Morton, Washington on Sun, Dec 30, 1984, 7:00 AM PST (15:00 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.1 14 km NNE of Ashford, Washington. This one was a foreshock.

Morton 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
1.7 (md), micro
Local time
UTC
1984-12-30 15:00:51 UTC
Depth
-1.5 km (-0.9 mi), shallow
Epicenter
46.219° N, 122.188° 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 0.2 km horizontally, 2.8 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
219°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 3.114 km NNE of Ashford, Washington · 15239 days ago · 10 km deep · 75 km away
  2. 2.414 km NNE of Ashford, Washington · 15239 days ago · 8 km deep · 75 km away
  3. 1.623 km ENE of Ashford, Washington · 15237 days ago · 0 km deep · 78 km away
  4. 2.010 km NE of Ashford, Washington · 15233 days ago · 11 km deep · 71 km away
  5. 1.510 km ENE of Ashford, Washington · 15231 days ago · 9 km deep · 69 km away
  6. 2.03 km W of Deer Island, Oregon · 15222 days ago · 23 km deep · 63 km away
  7. 1.73 km W of Deer Island, Oregon · 15221 days ago · 24 km deep · 63 km away
  8. 2.713 km NNE of Ashford, Washington · 15218 days ago · 12 km deep · 74 km away
  9. 1.63 km WSW of Felida, Washington · 15207 days ago · 11 km deep · 72 km away
  10. 2.138 km NNE of Amboy, Washington · 15204 days ago · -1 km deep · 2 km away
  11. 1.815 km NNE of Ashford, Washington · 15204 days ago · 10 km deep · 76 km away
  12. 1.52 km ENE of Brush Prairie, Washington · 15203 days ago · 9 km deep · 60 km away
  13. 1.538 km NNE of Amboy, Washington · 15192 days ago · -1 km deep · 2 km away
  14. 1.91 km E of Meadow Glade, Washington · 15191 days ago · 10 km deep · 58 km away
  15. 1.812 km SE of Mossyrock, Washington · 15187 days ago · 14 km deep · 29 km away
  16. 1.538 km NNE of Amboy, Washington · 15186 days ago · -1 km deep · 2 km away
  17. 1.56 km SSW of Morton, Washington · 15181 days ago · 20 km deep · 33 km away

Before

  1. 2.710 km NNE of Ashford, Washington · 15244 days ago · 11 km deep · 71 km away
  2. 1.738 km S of Morton, Washington · 15254 days ago · -1 km deep · 1 km away
  3. 1.91 km NNE of Crocker, Washington · 15255 days ago · 7 km deep · 97 km away
  4. 2.51 km SSE of Beaverton, Oregon · 15260 days ago · 25 km deep · 95 km away
  5. 1.76 km SSW of Morton, Washington · 15267 days ago · 19 km deep · 34 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10184418. Read Tue, Sep 22, 2026, 9:10 AM UTC.