Washington earthquakes

M1.7 earthquake 4 km SE of Oso, Washington

A magnitude 1.7 earthquake struck 4 km SE of Oso, Washington on Wed, Mar 22, 2006, 6:46 PM PST (02:46 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M2.5 6 km NNE of Tanner, 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
1.7 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2006-03-23 02:46:53 UTC
Depth
11.8 km (7.3 mi), shallow
Epicenter
48.238° N, 121.886° 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 1.0 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
50°
Stations used
19

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. 1.513 km ESE of Acme, Washington · 7498 days ago · 2 km deep · 49 km away
  2. 2.00 km NW of Keyport, Washington · 7490 days ago · 22 km deep · 81 km away
  3. 1.61 km ENE of Keyport, Washington · 7489 days ago · 21 km deep · 80 km away
  4. 1.62 km NW of Edmonds, Washington · 7488 days ago · 21 km deep · 59 km away
  5. 1.53 km NE of Union Hill-Novelty Hill, Washington · 7485 days ago · 3 km deep · 60 km away
  6. 1.58 km SW of Concrete, Washington · 7482 days ago · 5 km deep · 28 km away
  7. 1.52 km NE of Snoqualmie, Washington · 7475 days ago · 17 km deep · 77 km away
  8. 1.99 km SW of Concrete, Washington · 7471 days ago · 6 km deep · 27 km away
  9. 1.92 km ENE of Granite Falls, Washington · 7468 days ago · -1 km deep · 17 km away
  10. 1.57 km S of Anacortes, Washington · 7465 days ago · 23 km deep · 59 km away
  11. 2.21 km NW of Snohomish, Washington · 7463 days ago · 25 km deep · 39 km away
  12. 1.528 km WSW of Winthrop, Washington · 7462 days ago · 3 km deep · 100 km away
  13. 2.56 km NNE of Tanner, Washington · 7451 days ago · 15 km deep · 80 km away
  14. 1.511 km W of Port Ludlow, Washington · 7451 days ago · 33 km deep · 79 km away
  15. 1.71 km NW of Lake Marcel-Stillwater, Washington · 7442 days ago · 27 km deep · 60 km away

Before

  1. 2.23 km SSW of Port Ludlow, Washington · 7501 days ago · 25 km deep · 71 km away
  2. 2.38 km NE of Lake Marcel-Stillwater, Washington · 7504 days ago · 2 km deep · 55 km away
  3. 1.64 km WSW of North Bend, Washington · 7514 days ago · 8 km deep · 85 km away
  4. 1.61 km E of Edison, Washington · 7514 days ago · 14 km deep · 54 km away
  5. 1.68 km N of Hamilton, Washington · 7521 days ago · -1 km deep · 41 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10691873. Read Mon, Oct 5, 2026, 7:42 AM UTC.