Washington earthquakes

M3.1 earthquake Washington

A magnitude 3.1 earthquake struck in Washington on Thu, Mar 27, 1986, 7:48 PM PST (03:48 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.6 2 km S of Swede Heaven, Washington. This one was a foreshock.

Swede Heaven 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
3.1 (md), minor
Local time
UTC
1986-03-28 03:48:34 UTC
Depth
1.4 km (0.8 mi), shallow
Epicenter
48.256° N, 121.736° 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, 1.1 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
63°
Stations used
33

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 21 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 1.72 km SSW of Swede Heaven, Washington · 14788 days ago · 2 km deep · 1 km away
  2. 3.62 km S of Swede Heaven, Washington · 14788 days ago · 2 km deep · 0 km away
  3. 2.4Washington · 14788 days ago · 3 km deep · 0 km away
  4. 2.12 km S of Swede Heaven, Washington · 14788 days ago · 1 km deep · 0 km away
  5. 1.83 km ENE of East Renton Highlands, Washington · 14787 days ago · 0 km deep · 88 km away
  6. 3.32 km S of Swede Heaven, Washington · 14787 days ago · 1 km deep · 0 km away
  7. 2.24 km ENE of Carnation, Washington · 14786 days ago · 17 km deep · 66 km away
  8. 2.32 km SSW of Swede Heaven, Washington · 14785 days ago · 1 km deep · 0 km away
  9. 2.40 km ESE of Clyde Hill, Washington · 14784 days ago · 24 km deep · 78 km away
  10. 2.04 km NNW of Woods Creek, Washington · 14777 days ago · 16 km deep · 40 km away
  11. 1.82 km S of Swede Heaven, Washington · 14773 days ago · 0 km deep · 1 km away
  12. 1.72 km SSW of Swede Heaven, Washington · 14771 days ago · 3 km deep · 1 km away
  13. 1.72 km SSW of Swede Heaven, Washington · 14771 days ago · 2 km deep · 1 km away
  14. 1.52 km SSW of Swede Heaven, Washington · 14771 days ago · 3 km deep · 1 km away
  15. 2.48 km SE of Glacier, Washington · 14767 days ago · 0 km deep · 66 km away
  16. 3.05 km ENE of Ferndale, Washington · 14764 days ago · 17 km deep · 90 km away
  17. 1.51 km WNW of North Bend, Washington · 14757 days ago · 16 km deep · 84 km away
  18. 1.57 km NNE of Lake Cavanaugh, Washington · 14752 days ago · 2 km deep · 23 km away
  19. 2.36 km S of Hansville, Washington · 14751 days ago · 25 km deep · 75 km away
  20. 2.63 km NNW of Kingston, Washington · 14750 days ago · 25 km deep · 75 km away
  21. 1.7Washington · 14745 days ago · 1 km deep · 74 km away

Before

  1. 1.73 km SSW of Swede Heaven, Washington · 14788 days ago · 3 km deep · 1 km away
  2. 2.92 km S of Swede Heaven, Washington · 14789 days ago · 1 km deep · 1 km away
  3. 1.72 km S of Swede Heaven, Washington · 14789 days ago · 0 km deep · 1 km away
  4. 1.63 km WNW of Picnic Point, Washington · 14789 days ago · 9 km deep · 62 km away
  5. 1.9Washington · 14790 days ago · 21 km deep · 80 km away
  6. 1.52 km SW of Swede Heaven, Washington · 14791 days ago · 3 km deep · 2 km away
  7. 1.74 km E of Lake Marcel-Stillwater, Washington · 14808 days ago · 17 km deep · 63 km away
  8. 2.04 km NE of Snoqualmie, Washington · 14812 days ago · 10 km deep · 78 km away
  9. 2.13 km SSE of Klahanie, Washington · 14813 days ago · 15 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10205193 (also filed as usp0002sby). Read Tue, Sep 22, 2026, 1:30 AM UTC.