Washington earthquakes

M3.3 earthquake 6 km E of Sedro-Woolley, Washington

A magnitude 3.3 earthquake struck 6 km E of Sedro-Woolley, Washington on Thu, Oct 13, 1977, 7:53 PM PDT (02:53 UTC), 4 km (3 mi) below the surface.

Sedro-Woolley 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
3.3 (md), minor
Local time
UTC
1977-10-14 02:53:32 UTC
Depth
4.1 km (2.6 mi), shallow
Epicenter
48.496° N, 122.153° 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, 2.1 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
111°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 2.42 km NNE of Coupeville, Washington · 17867 days ago · 22 km deep · 48 km away
  2. 1.55 km N of Victoria, Canada · 17861 days ago · 51 km deep · 89 km away
  3. 2.18 km NE of Duvall, Washington · 17861 days ago · 16 km deep · 81 km away
  4. 1.61 km N of Esperance, Washington · 17852 days ago · 6 km deep · 79 km away
  5. 1.92 km SSE of Three Lakes, Washington · 17846 days ago · 8 km deep · 64 km away
  6. 2.32 km WNW of La Conner, Washington · 17844 days ago · 22 km deep · 30 km away
  7. 1.70 km NNW of Clyde Hill, Washington · 17821 days ago · 21 km deep · 96 km away
  8. 2.11 km WNW of Indianola, Washington · 17819 days ago · 18 km deep · 87 km away
  9. 1.57 km WNW of Swede Heaven, Washington · 17817 days ago · 6 km deep · 33 km away
  10. 1.87 km NNE of Bryant, Washington · 17816 days ago · 2 km deep · 21 km away

Before

  1. 1.82 km NNE of Carnation, Washington · 17877 days ago · 22 km deep · 94 km away
  2. 1.54 km E of Echo Lake, Washington · 17879 days ago · 19 km deep · 80 km away
  3. 1.63 km NW of Suquamish, Washington · 17881 days ago · 21 km deep · 88 km away
  4. 1.76 km N of Anacortes, Washington · 17883 days ago · 18 km deep · 35 km away
  5. 2.010 km SSW of Bellingham, WA · 17884 days ago · 0 km deep · 33 km away
  6. 1.56 km SSW of Hansville, Washington · 17888 days ago · 15 km deep · 77 km away
  7. 1.65 km NNE of Oak Bay, Canada · 17889 days ago · 18 km deep · 82 km away
  8. 1.82 km S of Edison, Washington · 17893 days ago · 17 km deep · 22 km away
  9. 3.06 km SW of Lyman, Washington · 17894 days ago · 6 km deep · 2 km away
  10. 1.96 km E of Arlington Heights, Washington · 17894 days ago · 18 km deep · 36 km away
  11. 2.27 km W of Coupeville, Washington · 17904 days ago · 18 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10844913 (also filed as usp0000r1e). Read Tue, Sep 22, 2026, 4:23 AM UTC.