Washington earthquakes

M1.9 earthquake 37 km S of Morton, Washington

A magnitude 1.9 earthquake struck 37 km S of Morton, Washington on Mon, Oct 29, 1984, 4:23 PM PST (00:23 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.1 24 km NE 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
1.9 (md), micro
Local time
UTC
1984-10-30 00:23:37 UTC
Depth
-0.2 km (-0.1 mi), shallow
Epicenter
46.228° N, 122.193° 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 0.7 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
142°
Stations used
7

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 13 in the 30 days before it.

After

  1. 1.625 km ENE of Yacolt, Washington · 15307 days ago · 6 km deep · 29 km away
  2. 2.237 km S of Morton, Washington · 15307 days ago · 0 km deep · 0 km away
  3. 1.922 km S of Morton, Washington · 15306 days ago · 10 km deep · 16 km away
  4. 1.520 km NE of Ashford, Washington · 15303 days ago · 6 km deep · 80 km away
  5. 1.838 km NNE of Amboy, Washington · 15303 days ago · -2 km deep · 3 km away
  6. 1.610 km ENE of Ashford, Washington · 15298 days ago · 11 km deep · 67 km away
  7. 1.738 km NNE of Amboy, Washington · 15294 days ago · -2 km deep · 2 km away
  8. 3.124 km NE of Ashford, Washington · 15292 days ago · 0 km deep · 82 km away
  9. 1.55 km ESE of Mossyrock, Washington · 15292 days ago · 20 km deep · 37 km away
  10. 1.738 km NNE of Amboy, Washington · 15290 days ago · -2 km deep · 2 km away
  11. 2.438 km NNE of Amboy, Washington · 15290 days ago · -2 km deep · 2 km away
  12. 1.815 km NNE of Ashford, Washington · 15280 days ago · 7 km deep · 76 km away
  13. 1.76 km SSW of Morton, Washington · 15274 days ago · 19 km deep · 33 km away
  14. 2.51 km SSE of Beaverton, Oregon · 15268 days ago · 25 km deep · 96 km away
  15. 1.91 km NNE of Crocker, Washington · 15263 days ago · 7 km deep · 97 km away
  16. 1.738 km S of Morton, Washington · 15262 days ago · -1 km deep · 2 km away
  17. 2.710 km NNE of Ashford, Washington · 15251 days ago · 11 km deep · 71 km away

Before

  1. 1.538 km NNE of Amboy, Washington · 15318 days ago · -2 km deep · 2 km away
  2. 2.015 km SSW of Clatskanie, Oregon · 15320 days ago · 54 km deep · 91 km away
  3. 1.537 km SSE of Morton, Washington · 15320 days ago · 9 km deep · 5 km away
  4. 1.638 km NNE of Amboy, Washington · 15321 days ago · -2 km deep · 2 km away
  5. 1.541 km SSE of Morton, Washington · 15321 days ago · 9 km deep · 16 km away
  6. 2.06 km E of Ashford, Washington · 15323 days ago · 5 km deep · 61 km away
  7. 1.738 km NNE of Amboy, Washington · 15324 days ago · -2 km deep · 2 km away
  8. 1.529 km S of Mossyrock, Washington · 15324 days ago · 15 km deep · 21 km away
  9. 2.138 km NNE of Amboy, Washington · 15329 days ago · -2 km deep · 2 km away
  10. 1.95 km ESE of Packwood, Washington · 15333 days ago · 2 km deep · 61 km away
  11. 1.525 km S of Morton, Washington · 15333 days ago · 8 km deep · 12 km away
  12. 2.338 km NNE of Amboy, Washington · 15337 days ago · -2 km deep · 2 km away
  13. 1.837 km NNE of Amboy, Washington · 15338 days ago · 1 km deep · 4 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10184783. Read Wed, Sep 30, 2026, 3:39 AM UTC.