Washington earthquakes

M1.9 earthquake 9 km SW of Concrete, Washington

A magnitude 1.9 earthquake struck 9 km SW of Concrete, Washington on Fri, Apr 21, 2006, 5:13 PM PDT (00:13 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.5 4 km S of Langley, 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, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2006-04-22 00:13:11 UTC
Depth
5.7 km (3.5 mi), shallow
Epicenter
48.478° N, 121.831° 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 0.0 km horizontally, 0.1 km in depth
Magnitude uncertainty
±0.04
Depth from
Operator assigned
Station coverage gap
106°
Stations used
20

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 6 in the 30 days before it.

After

  1. 1.92 km ENE of Granite Falls, Washington · 7467 days ago · -1 km deep · 44 km away
  2. 1.57 km S of Anacortes, Washington · 7463 days ago · 23 km deep · 59 km away
  3. 2.21 km NW of Snohomish, Washington · 7462 days ago · 25 km deep · 65 km away
  4. 1.528 km WSW of Winthrop, Washington · 7460 days ago · 3 km deep · 94 km away
  5. 1.511 km W of Port Ludlow, Washington · 7449 days ago · 33 km deep · 97 km away
  6. 1.53 km N of Langley, Canada · 7441 days ago · 1 km deep · 94 km away
  7. 1.71 km NW of Lake Marcel-Stillwater, Washington · 7440 days ago · 27 km deep · 87 km away
  8. 1.94 km NE of Big Lake, Washington · 7436 days ago · -1 km deep · 27 km away
  9. 1.95 km SW of Ault Field, Washington · 7435 days ago · 18 km deep · 69 km away
  10. 1.84 km W of Lake Cavanaugh, Washington · 7429 days ago · 13 km deep · 26 km away
  11. 2.54 km S of Langley, Washington · 7426 days ago · 57 km deep · 68 km away
  12. 2.31 km WSW of Lyman, Washington · 7423 days ago · -1 km deep · 19 km away
  13. 1.74 km SE of Clear Lake, Washington · 7421 days ago · -1 km deep · 27 km away
  14. 2.46 km WSW of Darrington, Washington · 7420 days ago · 8 km deep · 30 km away
  15. 2.03 km E of Deming, Washington · 7419 days ago · -1 km deep · 46 km away
  16. 1.58 km N of Camano, Washington · 7419 days ago · 27 km deep · 57 km away
  17. 2.10 km SE of Oak Harbor, Washington · 7417 days ago · 24 km deep · 63 km away
  18. 1.5Washington · 7411 days ago · -1 km deep · 29 km away
  19. 2.28 km E of Deming, Washington · 7410 days ago · 15 km deep · 44 km away

Before

  1. 1.58 km SW of Concrete, Washington · 7480 days ago · 5 km deep · 1 km away
  2. 1.53 km NE of Union Hill-Novelty Hill, Washington · 7483 days ago · 3 km deep · 87 km away
  3. 1.51 km SSW of Walnut Grove, Canada · 7484 days ago · 12 km deep · 96 km away
  4. 1.62 km NW of Edmonds, Washington · 7486 days ago · 21 km deep · 83 km away
  5. 1.513 km ESE of Acme, Washington · 7497 days ago · 2 km deep · 26 km away
  6. 1.74 km SE of Oso, Washington · 7500 days ago · 12 km deep · 27 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10697308. Read Sat, Oct 3, 2026, 3:02 PM UTC.