Washington earthquakes

M2.3 earthquake 6 km SE of Marrowstone, Washington

A magnitude 2.3 earthquake struck 6 km SE of Marrowstone, Washington on Sat, Aug 20, 1977, 7:34 PM PDT (02:34 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.0 6 km SW of Lyman, Washington. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.3 (md), micro
Local time
UTC
1977-08-21 02:34:24 UTC
Depth
21.3 km (13.2 mi), shallow
Epicenter
48.007° N, 122.640° 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 0.4 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
121°
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: 24 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 1.79 km S of Marietta, Washington · 17923 days ago · 22 km deep · 77 km away
  2. 1.52 km NW of Snoqualmie, Washington · 17922 days ago · 25 km deep · 78 km away
  3. 1.72 km ENE of Union Hill-Novelty Hill, Washington · 17916 days ago · 23 km deep · 60 km away
  4. 1.74 km NW of Federal Way, Washington · 17913 days ago · 22 km deep · 76 km away
  5. 1.56 km ESE of Lake Marcel-Stillwater, Washington · 17905 days ago · 16 km deep · 71 km away
  6. 2.27 km W of Coupeville, Washington · 17904 days ago · 18 km deep · 25 km away
  7. 1.74 km NE of North Bend, Washington · 17897 days ago · -1 km deep · 86 km away
  8. 1.63 km NE of Bonney Lake, Washington · 17896 days ago · 15 km deep · 97 km away
  9. 1.96 km E of Arlington Heights, Washington · 17895 days ago · 18 km deep · 53 km away
  10. 3.06 km SW of Lyman, Washington · 17894 days ago · 6 km deep · 66 km away
  11. 1.82 km S of Edison, Washington · 17893 days ago · 17 km deep · 61 km away
  12. 1.65 km NNE of Oak Bay, Canada · 17889 days ago · 18 km deep · 71 km away
  13. 1.56 km SSW of Hansville, Washington · 17888 days ago · 15 km deep · 16 km away
  14. 1.64 km WNW of Mercer Island, Washington · 17885 days ago · 38 km deep · 54 km away
  15. 2.010 km SSW of Bellingham, WA · 17884 days ago · 0 km deep · 74 km away
  16. 1.76 km N of Anacortes, Washington · 17883 days ago · 18 km deep · 63 km away
  17. 1.63 km NW of Suquamish, Washington · 17881 days ago · 21 km deep · 28 km away
  18. 1.81 km E of Enetai, Washington · 17880 days ago · 20 km deep · 47 km away
  19. 1.54 km E of Echo Lake, Washington · 17879 days ago · 19 km deep · 55 km away
  20. 1.82 km NNE of Carnation, Washington · 17877 days ago · 22 km deep · 67 km away
  21. 3.36 km E of Sedro-Woolley, Washington · 17875 days ago · 4 km deep · 65 km away
  22. 3.215 km S of Sooke, Canada · 17874 days ago · 46 km deep · 87 km away
  23. 1.62 km NW of White Center, Washington · 17874 days ago · 19 km deep · 57 km away
  24. 2.10 km E of Riverton, Washington · 17870 days ago · 22 km deep · 64 km away

Before

  1. 2.05 km SW of Bellingham, Washington · 17930 days ago · 15 km deep · 80 km away
  2. 2.05 km N of Arlington Heights, Washington · 17931 days ago · 0 km deep · 50 km away
  3. 2.43 km S of Woods Creek, Washington · 17932 days ago · 2 km deep · 58 km away
  4. 1.75 km NNW of Belfair, Washington · 17936 days ago · 22 km deep · 59 km away
  5. 1.71 km WNW of Mountlake Terrace, Washington · 17936 days ago · 14 km deep · 34 km away
  6. 1.52 km NNE of Bonney Lake, Washington · 17939 days ago · 12 km deep · 96 km away
  7. 1.55 km NNW of Port Townsend, Washington · 17940 days ago · 20 km deep · 20 km away
  8. 1.74 km NE of Kingston, Washington · 17942 days ago · 18 km deep · 23 km away
  9. 1.51 km NNE of Lynnwood, Washington · 17945 days ago · 2 km deep · 32 km away
  10. 2.70 km W of Alderwood Manor, Washington · 17945 days ago · 14 km deep · 33 km away
  11. 2.13 km SSW of Redmond, Washington · 17946 days ago · 0 km deep · 55 km away
  12. 1.65 km S of Gorst, Washington · 17948 days ago · 22 km deep · 60 km away
  13. 2.02 km NNE of Duvall, Washington · 17949 days ago · 19 km deep · 57 km away
  14. 3.75 km NW of Port Hadlock-Irondale, Washington · 17955 days ago · 53 km deep · 16 km away
  15. 1.80 km WNW of Normandy Park, Washington · 17956 days ago · 16 km deep · 67 km away
  16. 2.02 km W of Artondale, Washington · 17958 days ago · 20 km deep · 79 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10844468. Read Tue, Sep 22, 2026, 7:07 AM UTC.