Washington earthquakes

M1.5 earthquake 16 km S of Skykomish, Washington

A magnitude 1.5 earthquake struck 16 km S of Skykomish, Washington on Thu, Aug 25, 1977, 10:59 PM PDT (05:59 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.3 7 km NW of Entiat, 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
1.5 (md), micro
Local time
UTC
1977-08-26 05:59:38 UTC
Depth
2.9 km (1.8 mi), shallow
Epicenter
47.561° N, 121.383° 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 1.1 km horizontally, 1.9 km in depth
Depth from
From location
Station coverage gap
223°, 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: 26 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 1.52 km NW of Snoqualmie, Washington · 17922 days ago · 25 km deep · 35 km away
  2. 2.37 km NW of Entiat, Washington · 17921 days ago · 7 km deep · 84 km away
  3. 1.72 km ENE of Union Hill-Novelty Hill, Washington · 17916 days ago · 23 km deep · 48 km away
  4. 1.613 km SSW of South Cle Elum, Washington · 17914 days ago · 1 km deep · 62 km away
  5. 1.613 km NNE of Cliffdell, Washington · 17914 days ago · 7 km deep · 64 km away
  6. 1.74 km NW of Federal Way, Washington · 17913 days ago · 22 km deep · 76 km away
  7. 2.115 km NNE of Ashford, Washington · 17909 days ago · -1 km deep · 86 km away
  8. 1.56 km ESE of Lake Marcel-Stillwater, Washington · 17906 days ago · 16 km deep · 36 km away
  9. 1.74 km NE of North Bend, Washington · 17897 days ago · -1 km deep · 27 km away
  10. 1.63 km NE of Bonney Lake, Washington · 17897 days ago · 15 km deep · 71 km away
  11. 1.96 km E of Arlington Heights, Washington · 17895 days ago · 18 km deep · 83 km away
  12. 1.915 km NNE of Ashford, Washington · 17893 days ago · 4 km deep · 86 km away
  13. 1.914 km E of Wilkeson, Washington · 17889 days ago · 7 km deep · 63 km away
  14. 1.56 km SSW of Hansville, Washington · 17888 days ago · 15 km deep · 97 km away
  15. 1.64 km WNW of Mercer Island, Washington · 17885 days ago · 38 km deep · 67 km away
  16. 1.63 km NW of Suquamish, Washington · 17881 days ago · 21 km deep · 93 km away
  17. 1.66 km W of Entiat, Washington · 17880 days ago · 0 km deep · 83 km away
  18. 1.81 km E of Enetai, Washington · 17880 days ago · 20 km deep · 90 km away
  19. 2.913 km NNE of Ellensburg, Washington · 17880 days ago · 0 km deep · 84 km away
  20. 1.54 km E of Echo Lake, Washington · 17879 days ago · 19 km deep · 52 km away
  21. 1.82 km NNE of Carnation, Washington · 17877 days ago · 22 km deep · 40 km away
  22. 1.62 km NW of White Center, Washington · 17874 days ago · 19 km deep · 75 km away
  23. 1.86 km WNW of Entiat, Washington · 17872 days ago · 0 km deep · 83 km away
  24. 1.625 km ENE of Ashford, Washington · 17871 days ago · 0 km deep · 83 km away
  25. 2.10 km E of Riverton, Washington · 17870 days ago · 22 km deep · 68 km away
  26. 1.74 km NNE of Entiat, Washington · 17867 days ago · 2 km deep · 92 km away

Before

  1. 1.515 km NNE of Ashford, Washington · 17924 days ago · 15 km deep · 86 km away
  2. 1.717 km S of Skykomish, Washington · 17924 days ago · 3 km deep · 1 km away
  3. 1.917 km SE of Carbonado, Washington · 17925 days ago · 9 km deep · 77 km away
  4. 1.713 km SSW of South Cle Elum, Washington · 17927 days ago · 9 km deep · 61 km away
  5. 2.05 km N of Arlington Heights, Washington · 17931 days ago · 0 km deep · 92 km away
  6. 2.43 km S of Woods Creek, Washington · 17932 days ago · 2 km deep · 50 km away
  7. 1.71 km WNW of Mountlake Terrace, Washington · 17936 days ago · 14 km deep · 75 km away
  8. 1.52 km NNE of Bonney Lake, Washington · 17939 days ago · 12 km deep · 72 km away
  9. 1.74 km NE of Kingston, Washington · 17942 days ago · 18 km deep · 86 km away
  10. 1.51 km NNE of Lynnwood, Washington · 17945 days ago · 2 km deep · 75 km away
  11. 2.70 km W of Alderwood Manor, Washington · 17945 days ago · 14 km deep · 74 km away
  12. 2.13 km SSW of Redmond, Washington · 17946 days ago · 0 km deep · 58 km away
  13. 2.02 km NNE of Duvall, Washington · 17949 days ago · 19 km deep · 49 km away
  14. 2.013 km ENE of Ashford, Washington · 17950 days ago · 2 km deep · 91 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10844523. Read Tue, Sep 22, 2026, 8:20 AM UTC.