Washington earthquakes

M1.6 earthquake 23 km S of Morton, Washington

A magnitude 1.6 earthquake struck 23 km S of Morton, Washington on Mon, Dec 1, 1980, 3:23 PM PST (23:23 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M1.9 9 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
1.6 (md), micro
Local time
UTC
1980-12-01 23:23:47 UTC
Depth
-1.0 km (-0.6 mi), shallow
Epicenter
46.346° N, 122.232° 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 0.4 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.17
Depth from
Operator assigned
Station coverage gap
112°
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: 15 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.537 km NNE of Amboy, Washington · 16716 days ago · 1 km deep · 17 km away
  2. 1.99 km NE of Ashford, Washington · 16713 days ago · 9 km deep · 57 km away
  3. 1.538 km S of Morton, Washington · 16709 days ago · -1 km deep · 15 km away
  4. 1.637 km NNE of Amboy, Washington · 16709 days ago · 1 km deep · 16 km away
  5. 1.57 km NE of Bonney Lake, Washington · 16708 days ago · 12 km deep · 98 km away
  6. 2.036 km NNE of Amboy, Washington · 16708 days ago · 3 km deep · 18 km away
  7. 1.738 km S of Morton, Washington · 16707 days ago · 1 km deep · 14 km away
  8. 1.938 km S of Morton, Washington · 16707 days ago · 0 km deep · 14 km away
  9. 2.737 km NNE of Amboy, Washington · 16706 days ago · 1 km deep · 17 km away
  10. 1.838 km NNE of Amboy, Washington · 16706 days ago · 1 km deep · 16 km away
  11. 2.333 km NNE of Amboy, Washington · 16705 days ago · -1 km deep · 20 km away
  12. 1.912 km ESE of Carbonado, Washington · 16705 days ago · 16 km deep · 82 km away
  13. 1.736 km S of Morton, Washington · 16705 days ago · 0 km deep · 13 km away
  14. 1.737 km NNE of Amboy, Washington · 16697 days ago · 0 km deep · 16 km away
  15. 1.63 km SW of Felida, Washington · 16684 days ago · 21 km deep · 83 km away

Before

  1. 1.619 km NNE of Ashford, Washington · 16736 days ago · 7 km deep · 68 km away
  2. 1.69 km WNW of Deer Island, Oregon · 16737 days ago · 23 km deep · 70 km away
  3. 2.119 km NE of Ashford, Washington · 16742 days ago · 9 km deep · 68 km away
  4. 2.112 km SE of Mossyrock, Washington · 16747 days ago · 9 km deep · 15 km away
  5. 2.125 km S of Morton, Washington · 16761 days ago · 1 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10089408. Read Thu, Sep 24, 2026, 9:40 AM UTC.