Washington earthquakes

M2.4 earthquake 25 km SSE of Morton, Washington

A magnitude 2.4 earthquake struck 25 km SSE of Morton, Washington on Wed, Sep 3, 1975, 5:56 PM PDT (00:56 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.2 27 km NE of Amboy, 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
2.4 (md), micro
Local time
UTC
1975-09-04 00:56:55 UTC
Depth
7.6 km (4.7 mi), shallow
Epicenter
46.340° N, 122.164° 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 2.4 km horizontally, 5.1 km in depth
Magnitude uncertainty
±0.11
Depth from
Operator assigned
Station coverage gap
182°, 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: 16 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.923 km SE of Greenwater, Washington · 18643 days ago · 2 km deep · 92 km away
  2. 2.925 km S of Morton, Washington · 18641 days ago · 9 km deep · 8 km away
  3. 2.024 km S of Morton, Washington · 18641 days ago · 7 km deep · 6 km away
  4. 1.711 km NNW of Skamokawa Valley, Washington · 18641 days ago · 0 km deep · 98 km away
  5. 1.911 km W of Packwood, Washington · 18638 days ago · 4 km deep · 39 km away
  6. 1.724 km SE of Greenwater, Washington · 18635 days ago · 8 km deep · 88 km away
  7. 2.024 km S of Morton, Washington · 18634 days ago · -1 km deep · 8 km away
  8. 2.727 km S of Morton, Washington · 18620 days ago · 11 km deep · 7 km away
  9. 2.642 km SSE of Morton, Washington · 18617 days ago · 9 km deep · 16 km away
  10. 3.227 km NE of Amboy, Washington · 18617 days ago · 23 km deep · 27 km away
  11. 1.813 km NNW of Mossyrock, Washington · 18617 days ago · -1 km deep · 45 km away
  12. 2.213 km NNW of Mossyrock, Washington · 18616 days ago · 13 km deep · 45 km away
  13. 1.913 km SSE of Pe Ell, Washington · 18615 days ago · -1 km deep · 84 km away
  14. 2.218 km N of Mossyrock, Washington · 18607 days ago · 2 km deep · 47 km away
  15. 1.713 km WSW of Alder, Washington · 18606 days ago · -1 km deep · 50 km away
  16. 1.96 km SW of Morton, Washington · 18599 days ago · 11 km deep · 24 km away

Before

  1. 2.038 km SSE of Morton, Washington · 18656 days ago · 4 km deep · 13 km away
  2. 2.61 km WNW of Crocker, Washington · 18656 days ago · 7 km deep · 83 km away
  3. 2.213 km NNE of Amboy, Washington · 18657 days ago · 5 km deep · 39 km away
  4. 2.130 km NNE of Amboy, Washington · 18680 days ago · 5 km deep · 23 km away
  5. 2.424 km NE of Ashford, Washington · 18684 days ago · 5 km deep · 68 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10861653. Read Wed, Sep 30, 2026, 1:12 PM UTC.