Washington earthquakes

M1.9 earthquake 20 km NNE of Concrete, Washington

A magnitude 1.9 earthquake struck 20 km NNE of Concrete, Washington on Tue, Feb 4, 1986, 9:54 PM PST (05:54 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.1 9 km NE of Lake Cavanaugh, Washington. This one was a foreshock.

Concrete 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
1986-02-05 05:54:48 UTC
Depth
-0.9 km (-0.5 mi), shallow
Epicenter
48.715° N, 121.686° 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
±0.11
Depth from
Operator assigned
Station coverage gap
166°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.59 km NE of Lake Cavanaugh, Washington · 14835 days ago · -1 km deep · 40 km away
  2. 3.19 km NE of Lake Cavanaugh, Washington · 14834 days ago · 3 km deep · 40 km away
  3. 3.99 km NE of Lake Cavanaugh, Washington · 14834 days ago · -1 km deep · 40 km away
  4. 2.28 km NNE of Lake Cavanaugh, Washington · 14834 days ago · 1 km deep · 41 km away
  5. 1.79 km NNE of Lake Cavanaugh, Washington · 14834 days ago · 3 km deep · 41 km away
  6. 1.69 km NNE of Lake Cavanaugh, Washington · 14834 days ago · 2 km deep · 41 km away
  7. 1.69 km NE of Lake Cavanaugh, Washington · 14828 days ago · -1 km deep · 40 km away
  8. 1.63 km E of Granite Falls, Washington · 14823 days ago · -1 km deep · 72 km away
  9. 1.52 km SW of Swede Heaven, Washington · 14793 days ago · 3 km deep · 50 km away
  10. 1.72 km S of Swede Heaven, Washington · 14790 days ago · 0 km deep · 51 km away
  11. 2.92 km S of Swede Heaven, Washington · 14790 days ago · 1 km deep · 50 km away
  12. 1.73 km SSW of Swede Heaven, Washington · 14789 days ago · 3 km deep · 51 km away
  13. 3.1Washington · 14789 days ago · 1 km deep · 51 km away
  14. 1.72 km SSW of Swede Heaven, Washington · 14789 days ago · 2 km deep · 51 km away
  15. 3.62 km S of Swede Heaven, Washington · 14789 days ago · 2 km deep · 51 km away
  16. 2.4Washington · 14789 days ago · 3 km deep · 51 km away
  17. 2.12 km S of Swede Heaven, Washington · 14789 days ago · 1 km deep · 51 km away
  18. 3.32 km S of Swede Heaven, Washington · 14788 days ago · 1 km deep · 51 km away
  19. 2.111 km SSW of Hope, Canada · 14786 days ago · 8 km deep · 65 km away
  20. 2.32 km SSW of Swede Heaven, Washington · 14786 days ago · 1 km deep · 51 km away

Before

  1. 1.511 km NNE of North Sultan, Washington · 14841 days ago · -1 km deep · 82 km away
  2. 1.96 km ENE of Verlot, Washington · 14845 days ago · 14 km deep · 67 km away
  3. 1.55 km E of Granite Falls, Washington · 14855 days ago · -1 km deep · 71 km away
  4. 1.80 km S of Big Lake, Washington · 14858 days ago · 14 km deep · 54 km away
  5. 2.87 km ESE of Verlot, Washington · 14863 days ago · 1 km deep · 71 km away
  6. 2.18 km ESE of Verlot, Washington · 14863 days ago · 4 km deep · 71 km away
  7. 1.810 km S of Darrington, Washington · 14867 days ago · 8 km deep · 62 km away
  8. 2.33 km N of Hamilton, Washington · 14869 days ago · 1 km deep · 29 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10201428. Read Wed, Sep 23, 2026, 3:34 AM UTC.