Washington earthquakes

M1.7 earthquake 8 km N of Sedro-Woolley, Washington

A magnitude 1.7 earthquake struck 8 km N of Sedro-Woolley, Washington on Thu, Jul 7, 1983, 2:54 PM PDT (21:54 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M3.9 11 km W of Port Ludlow, Washington. This one was a foreshock.

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
1.7 (md), micro
Local time
UTC
1983-07-07 21:54:06 UTC
Depth
12.0 km (7.5 mi), shallow
Epicenter
48.577° N, 122.215° 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 1.3 km horizontally, 5.4 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
121°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 21 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.00 km WSW of Port Ludlow, Washington · 15785 days ago · 55 km deep · 81 km away
  2. 1.82 km ESE of Maltby, Washington · 15783 days ago · 22 km deep · 87 km away
  3. 2.54 km NNW of Verlot, Washington · 15782 days ago · 14 km deep · 58 km away
  4. 1.87 km SSE of Verlot, Washington · 15776 days ago · -1 km deep · 70 km away
  5. 2.217 km NNE of May Creek, Washington · 15773 days ago · 0 km deep · 79 km away
  6. 2.110 km ENE of Lake Marcel-Stillwater, Washington · 15771 days ago · 17 km deep · 100 km away
  7. 1.64 km S of Monroe, Washington · 15766 days ago · -1 km deep · 86 km away
  8. 1.55 km SSE of Swede Heaven, Washington · 15762 days ago · 9 km deep · 54 km away
  9. 1.76 km WNW of La Conner, Washington · 15760 days ago · 22 km deep · 32 km away
  10. 1.75 km WSW of Coupeville, Washington · 15759 days ago · 20 km deep · 58 km away
  11. 1.54 km W of Coupeville, Washington · 15757 days ago · 17 km deep · 56 km away
  12. 1.6Puget Sound region, Washington · 15755 days ago · 7 km deep · 99 km away
  13. 2.711 km WNW of Coupeville, Washington · 15745 days ago · 8 km deep · 57 km away
  14. 1.73 km ENE of Granite Falls, Washington · 15736 days ago · -1 km deep · 58 km away
  15. 2.27 km WNW of Orcas, Washington · 15736 days ago · 14 km deep · 61 km away
  16. 3.911 km W of Port Ludlow, Washington · 15736 days ago · 51 km deep · 85 km away
  17. 2.62 km SSE of Tulalip Bay, Washington · 15735 days ago · 14 km deep · 62 km away
  18. 2.03 km NNE of Camano, Washington · 15731 days ago · 23 km deep · 47 km away
  19. 1.55 km W of Coupeville, Washington · 15729 days ago · 17 km deep · 57 km away
  20. 1.82 km W of Coupeville, Washington · 15728 days ago · 23 km deep · 55 km away
  21. 2.65 km SSW of Hansville, Washington · 15728 days ago · 22 km deep · 83 km away

Before

  1. 1.95 km ENE of Verlot, Washington · 15788 days ago · 13 km deep · 63 km away
  2. 2.13 km WNW of Orcas, Washington · 15788 days ago · 10 km deep · 57 km away
  3. 1.89 km S of Anacortes, Washington · 15790 days ago · 21 km deep · 34 km away
  4. 1.51 km ESE of Martha Lake, Washington · 15794 days ago · 20 km deep · 81 km away
  5. 2.127 km ESE of Glacier, Washington · 15794 days ago · -1 km deep · 52 km away
  6. 1.51 km E of Roosevelt, Washington · 15797 days ago · 18 km deep · 78 km away
  7. 1.57 km ENE of Verlot, Washington · 15798 days ago · 8 km deep · 65 km away
  8. 2.113 km S of Chilliwack, Canada · 15800 days ago · -1 km deep · 56 km away
  9. 2.15 km S of Lake Roesiger, Washington · 15805 days ago · 15 km deep · 75 km away
  10. 2.010 km NW of Concrete, Washington · 15809 days ago · 0 km deep · 29 km away
  11. 1.65 km E of Ault Field, Washington · 15810 days ago · 23 km deep · 38 km away
  12. 1.512 km NE of Index, Washington · 15811 days ago · 1 km deep · 95 km away
  13. 1.87 km NW of Orcas, Washington · 15812 days ago · 15 km deep · 60 km away
  14. 1.64 km N of Bryant, Washington · 15816 days ago · 16 km deep · 33 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10157723. Read Sun, Sep 27, 2026, 4:00 AM UTC.