Washington earthquakes

M1.6 earthquake 4 km SE of Oso, Washington

A magnitude 1.6 earthquake struck 4 km SE of Oso, Washington on Wed, Oct 6, 2004, 11:36 AM PDT (18:36 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M2.2 2 km NE of Camano, 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
1.6 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2004-10-06 18:36:33 UTC
Depth
12.3 km (7.6 mi), shallow
Epicenter
48.242° N, 121.894° 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 0.3 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.02
Depth from
From location
Station coverage gap
114°
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.845 km WNW of Granite Falls, Washington · 8024 days ago · 0 km deep · 87 km away
  2. 1.62 km SE of Port Hadlock-Irondale, Washington · 8006 days ago · 25 km deep · 69 km away
  3. 1.54 km N of White Center, Washington · 7997 days ago · 28 km deep · 84 km away
  4. 1.64 km WSW of Wilderness Rim, Washington · 7990 days ago · 20 km deep · 90 km away
  5. 2.22 km NE of Camano, Washington · 7986 days ago · 29 km deep · 46 km away
  6. 1.85 km S of Kendall, Washington · 7984 days ago · 13 km deep · 71 km away
  7. 1.62 km ENE of Granite Falls, Washington · 7984 days ago · -1 km deep · 17 km away
  8. 2.07 km ESE of Abbotsford, Canada · 7983 days ago · -1 km deep · 90 km away
  9. 2.15 km WSW of Port Hadlock-Irondale, Washington · 7983 days ago · 21 km deep · 75 km away

Before

  1. 1.75 km ENE of Granite Falls, Washington · 8032 days ago · -1 km deep · 16 km away
  2. 1.52 km ESE of Sudden Valley, Washington · 8034 days ago · 19 km deep · 61 km away
  3. 2.32 km NE of Union Hill-Novelty Hill, Washington · 8035 days ago · 9 km deep · 62 km away
  4. 1.58 km SW of Camano, Washington · 8036 days ago · 26 km deep · 55 km away
  5. 3.14 km NNE of Jamestown, Washington · 8043 days ago · 16 km deep · 87 km away
  6. 1.96 km ENE of Acme, Washington · 8049 days ago · 14 km deep · 57 km away
  7. 1.55 km SSW of Fall City, Washington · 8054 days ago · 13 km deep · 81 km away
  8. 2.27 km SSE of Maple Falls, Washington · 8057 days ago · -1 km deep · 70 km away
  9. 1.92 km SE of Sudden Valley, Washington · 8059 days ago · 20 km deep · 61 km away
  10. 1.51 km E of Maple Valley, Washington · 8059 days ago · 13 km deep · 95 km away
  11. 1.65 km SE of Oso, Washington · 8060 days ago · 12 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10646348. Read Fri, Oct 2, 2026, 11:23 AM UTC.