Washington earthquakes

M1.9 earthquake 8 km NW of Friday Harbor, Washington

A magnitude 1.9 earthquake struck 8 km NW of Friday Harbor, Washington on Tue, Sep 11, 1973, 8:39 AM PDT (15:39 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.1 16 km W of Quilcene, Washington. This one was a foreshock.

Friday Harbor 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), micro
Local time
UTC
1973-09-11 15:39:38 UTC
Depth
5.8 km (3.6 mi), shallow
Epicenter
48.600° N, 123.087° 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 2.6 km horizontally, 4.6 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
204°, poorly surrounded by stations
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: 14 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.86 km NW of Friday Harbor, Washington · 19368 days ago · 5 km deep · 3 km away
  2. 1.55 km N of Marrowstone, Washington · 19366 days ago · 24 km deep · 63 km away
  3. 2.116 km W of Quilcene, Washington · 19365 days ago · 45 km deep · 89 km away
  4. 2.34 km SW of Geneva, Washington · 19363 days ago · 24 km deep · 49 km away
  5. 2.815 km NNE of Oak Bay, Canada · 19356 days ago · 50 km deep · 13 km away
  6. 1.67 km NNE of Port Ludlow, Washington · 19351 days ago · 4 km deep · 75 km away
  7. 1.710 km SSE of Port Angeles East, Washington · 19350 days ago · 46 km deep · 65 km away
  8. 1.61 km NNW of Hansville, Washington · 19349 days ago · 20 km deep · 84 km away
  9. 1.78 km SE of Oak Bay, Canada · 19347 days ago · 22 km deep · 26 km away
  10. 2.84 km N of Hansville, Washington · 19345 days ago · 23 km deep · 81 km away
  11. 1.64 km S of Lake Cavanaugh, Washington · 19336 days ago · 13 km deep · 87 km away
  12. 2.10 km SW of Oak Harbor, Washington · 19312 days ago · 16 km deep · 47 km away
  13. 1.95 km ESE of Alger, Washington · 19312 days ago · 14 km deep · 60 km away
  14. 2.02 km SSE of Coupeville, Washington · 19309 days ago · 32 km deep · 55 km away

Before

  1. 2.45 km ESE of Nooksack, Washington · 19369 days ago · 21 km deep · 71 km away
  2. 1.85 km ESE of Nooksack, Washington · 19369 days ago · 15 km deep · 70 km away
  3. 2.15 km ESE of Port Townsend, Washington · 19375 days ago · 59 km deep · 63 km away
  4. 2.311 km SW of Concrete, Washington · 19376 days ago · 0 km deep · 93 km away
  5. 2.012 km SE of Hamilton, Washington · 19378 days ago · -1 km deep · 90 km away
  6. 2.313 km W of Quilcene, Washington · 19382 days ago · 48 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10857033. Read Tue, Sep 22, 2026, 8:43 AM UTC.