Washington earthquakes

M1.9 earthquake 2 km SE of Sudden Valley, Washington

A magnitude 1.9 earthquake struck 2 km SE of Sudden Valley, Washington on Wed, Sep 8, 2004, 2:24 PM PDT (21:24 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M3.1 4 km NNE of Jamestown, Washington. This one was a foreshock.

Sudden Valley 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
2004-09-08 21:24:16 UTC
Depth
20.5 km (12.7 mi), shallow
Epicenter
48.706° N, 122.325° 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, 1.8 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
68°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 19 in the 30 days before it.

After

  1. 2.27 km SSE of Maple Falls, Washington · 8060 days ago · -1 km deep · 26 km away
  2. 1.96 km ENE of Acme, Washington · 8052 days ago · 14 km deep · 15 km away
  3. 3.14 km NNE of Jamestown, Washington · 8046 days ago · 16 km deep · 82 km away
  4. 1.58 km SW of Camano, Washington · 8039 days ago · 26 km deep · 68 km away
  5. 1.52 km ESE of Sudden Valley, Washington · 8037 days ago · 19 km deep · 1 km away
  6. 1.75 km ENE of Granite Falls, Washington · 8034 days ago · -1 km deep · 75 km away
  7. 1.64 km SE of Oso, Washington · 8034 days ago · 12 km deep · 61 km away
  8. 1.62 km SE of Port Hadlock-Irondale, Washington · 8009 days ago · 25 km deep · 83 km away

Before

  1. 1.717 km W of Richmond, Canada · 8063 days ago · 0 km deep · 92 km away
  2. 1.65 km SE of Oso, Washington · 8063 days ago · 12 km deep · 62 km away
  3. 1.59 km WSW of Port Ludlow, Washington · 8067 days ago · 26 km deep · 97 km away
  4. 1.51 km NNW of Silvana, Washington · 8073 days ago · 8 km deep · 55 km away
  5. 1.97 km ENE of Coquitlam, Canada · 8073 days ago · 3 km deep · 72 km away
  6. 1.7British Columbia, Canada · 8075 days ago · 1 km deep · 44 km away
  7. 1.5Washington · 8078 days ago · 7 km deep · 26 km away
  8. 2.03 km NE of Anacortes, Washington · 8078 days ago · 17 km deep · 27 km away
  9. 2.44 km NNE of Anacortes, Washington · 8078 days ago · 15 km deep · 26 km away
  10. 1.54 km NE of Anacortes, Washington · 8078 days ago · 16 km deep · 26 km away
  11. 2.12 km E of Edmonds, Washington · 8081 days ago · 31 km deep · 100 km away
  12. 1.91 km WNW of Swede Heaven, Washington · 8081 days ago · 7 km deep · 62 km away
  13. 1.65 km SSE of Swede Heaven, Washington · 8081 days ago · 9 km deep · 70 km away
  14. 1.73 km NNW of Sumas, Washington · 8082 days ago · 0 km deep · 36 km away
  15. 1.86 km W of Orcas, Washington · 8083 days ago · 13 km deep · 53 km away
  16. 1.5British Columbia, Canada · 8085 days ago · 24 km deep · 77 km away
  17. 1.51 km NE of Lyman, Washington · 8089 days ago · 1 km deep · 28 km away
  18. 2.318 km E of Verlot, Washington · 8089 days ago · 4 km deep · 92 km away
  19. 1.614 km SSW of Chilliwack, Canada · 8091 days ago · -1 km deep · 44 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10618733. Read Mon, Oct 5, 2026, 7:56 AM UTC.