Washington earthquakes

M1.5 earthquake 18 km S of Friday Harbor, Washington

A magnitude 1.5 earthquake struck 18 km S of Friday Harbor, Washington on Tue, Dec 27, 1977, 11:54 AM PST (19:54 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.4 20 km NNW of Hoodsport, 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
1.5 (md), micro
Local time
UTC
1977-12-27 19:54:28 UTC
Depth
-0.3 km (-0.2 mi), shallow
Epicenter
48.369° N, 122.989° 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 3.4 km horizontally, 10.5 km in depth
Depth from
From location
Station coverage gap
200°, 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 9 in the 30 days before it.

After

  1. 2.420 km NNW of Hoodsport, Washington · 17792 days ago · 42 km deep · 90 km away
  2. 2.72 km ENE of Nooksack, Washington · 17787 days ago · 0 km deep · 81 km away
  3. 2.02 km SE of Bangor Trident Base, Washington · 17786 days ago · 48 km deep · 77 km away
  4. 1.71 km NNE of Cathcart, Washington · 17778 days ago · 17 km deep · 87 km away
  5. 2.36 km NNE of Lofall, Washington · 17771 days ago · 19 km deep · 63 km away
  6. 2.08 km WNW of Gorst, Washington · 17757 days ago · 21 km deep · 92 km away
  7. 3.127 km W of Quilcene, Washington · 17756 days ago · 41 km deep · 65 km away
  8. 1.78 km S of Swede Heaven, Washington · 17755 days ago · 8 km deep · 95 km away
  9. 2.24 km SSW of La Conner, Washington · 17754 days ago · 17 km deep · 34 km away

Before

  1. 2.26 km SSE of Port Angeles East, Washington · 17801 days ago · 44 km deep · 43 km away
  2. 1.94 km NNE of Woods Creek, Washington · 17805 days ago · 12 km deep · 96 km away
  3. 1.63 km W of Chico, Washington · 17809 days ago · 19 km deep · 85 km away
  4. 1.54 km ESE of Indianola, Washington · 17810 days ago · 15 km deep · 80 km away
  5. 1.63 km W of Suquamish, Washington · 17814 days ago · 24 km deep · 77 km away
  6. 1.87 km NNE of Bryant, Washington · 17816 days ago · 2 km deep · 64 km away
  7. 1.57 km WNW of Swede Heaven, Washington · 17817 days ago · 6 km deep · 86 km away
  8. 2.11 km WNW of Indianola, Washington · 17819 days ago · 18 km deep · 76 km away
  9. 1.70 km NNW of Clyde Hill, Washington · 17821 days ago · 21 km deep · 100 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10845448. Read Tue, Sep 22, 2026, 8:45 AM UTC.