Washington earthquakes

M1.5 earthquake 28 km NW of Carson, Washington

A magnitude 1.5 earthquake struck 28 km NW of Carson, Washington on Thu, Nov 28, 1985, 9:56 PM PST (05:56 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M2.1 12 km N of Mossyrock, Washington. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.5 (md), micro
Local time
UTC
1985-11-29 05:56:51 UTC
Depth
11.1 km (6.9 mi), shallow
Epicenter
45.931° N, 122.032° 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 0.9 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
168°
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.112 km N of Mossyrock, Washington · 14899 days ago · 20 km deep · 87 km away
  2. 1.719 km S of Morton, Washington · 14887 days ago · 8 km deep · 53 km away
  3. 1.838 km NNE of Amboy, Washington · 14886 days ago · -2 km deep · 34 km away
  4. 1.537 km NNE of Amboy, Washington · 14886 days ago · -2 km deep · 33 km away
  5. 2.238 km NNE of Amboy, Washington · 14885 days ago · -1 km deep · 32 km away
  6. 1.66 km NE of Amboy, Washington · 14885 days ago · 16 km deep · 28 km away
  7. 1.725 km E of Castle Rock, Washington · 14882 days ago · 17 km deep · 56 km away
  8. 3.124 km S of Morton, Washington · 14881 days ago · 6 km deep · 48 km away
  9. 2.424 km S of Morton, Washington · 14881 days ago · 6 km deep · 48 km away
  10. 1.524 km S of Morton, Washington · 14881 days ago · 7 km deep · 48 km away
  11. 1.59 km ENE of Kalama, Washington · 14879 days ago · 14 km deep · 55 km away
  12. 1.514 km SSE of Ashford, Washington · 14878 days ago · 8 km deep · 80 km away
  13. 1.538 km NNE of Amboy, Washington · 14876 days ago · -2 km deep · 33 km away
  14. 2.54 km NNE of La Center, WA · 14874 days ago · 16 km deep · 49 km away
  15. 1.522 km ESE of Packwood, Washington · 14873 days ago · -1 km deep · 82 km away
  16. 1.723 km ESE of Packwood, Washington · 14873 days ago · -1 km deep · 82 km away
  17. 1.637 km S of Morton, Washington · 14856 days ago · 0 km deep · 35 km away
  18. 1.620 km S of Morton, Washington · 14856 days ago · 8 km deep · 52 km away
  19. 1.812 km ENE of Yacolt, Washington · 14853 days ago · 6 km deep · 18 km away

Before

  1. 1.84 km NE of Government Camp, Oregon · 14912 days ago · 1 km deep · 71 km away
  2. 3.03 km WSW of Molalla, Oregon · 14914 days ago · 24 km deep · 99 km away
  3. 2.921 km S of Morton, Washington · 14919 days ago · 10 km deep · 51 km away
  4. 2.32 km SE of Chenoweth, Oregon · 14930 days ago · -1 km deep · 73 km away
  5. 2.038 km S of Morton, Washington · 14931 days ago · -2 km deep · 34 km away
  6. 2.013 km NNW of Morton, Washington · 14933 days ago · 17 km deep · 85 km away
  7. 2.34 km SW of Sandy, Oregon · 14937 days ago · 20 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10200733. Read Tue, Sep 22, 2026, 11:38 PM UTC.