Washington earthquakes

M1.6 earthquake 35 km NE of Marblemount, Washington

A magnitude 1.6 earthquake struck 35 km NE of Marblemount, Washington on Sun, Feb 6, 2005, 3:31 AM PST (11:31 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.5 8 km ENE of Lake Roesiger, 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
1.6 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2005-02-06 11:31:45 UTC
Depth
-1.1 km (-0.7 mi), shallow
Epicenter
48.772° N, 121.144° 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 1.2 km horizontally, 7.3 km in depth
Magnitude uncertainty
±0.04
Depth from
Operator assigned
Station coverage gap
210°, poorly surrounded by stations
Stations used
5

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 4 in the 30 days before it.

After

  1. 1.66 km NE of Lake Roesiger, Washington · 7906 days ago · 16 km deep · 99 km away
  2. 1.76 km NE of Lake Roesiger, Washington · 7904 days ago · 12 km deep · 99 km away
  3. 1.9Washington · 7896 days ago · -1 km deep · 99 km away
  4. 1.548 km ENE of Marblemount, Washington · 7886 days ago · 16 km deep · 19 km away
  5. 2.28 km ENE of Lake Roesiger, Washington · 7884 days ago · 13 km deep · 98 km away
  6. 1.87 km ENE of Lake Roesiger, Washington · 7880 days ago · 13 km deep · 99 km away
  7. 2.76 km ENE of Lake Roesiger, Washington · 7880 days ago · 13 km deep · 100 km away
  8. 3.58 km ENE of Lake Roesiger, Washington · 7880 days ago · 13 km deep · 98 km away · felt by 455
  9. 1.97 km E of Abbotsford, Canada · 7871 days ago · 8 km deep · 80 km away

Before

  1. 1.932 km NE of Marblemount, Washington · 7908 days ago · 0 km deep · 3 km away
  2. 3.232 km NE of Marblemount, Washington · 7908 days ago · -1 km deep · 3 km away
  3. 2.36 km ENE of Lake Roesiger, Washington · 7911 days ago · 17 km deep · 100 km away
  4. 1.84 km E of Granite Falls, Washington · 7928 days ago · -1 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10624393. Read Fri, Oct 2, 2026, 12:01 PM UTC.