Washington earthquakes

M1.5 earthquake 2 km NW of Snoqualmie, Washington

A magnitude 1.5 earthquake struck 2 km NW of Snoqualmie, Washington on Sat, Aug 27, 1977, 10:16 PM PDT (05:16 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M1.7 2 km ENE of Union Hill-Novelty Hill, Washington. This one was a foreshock.

Snoqualmie 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
1977-08-28 05:16:05 UTC
Depth
25.4 km (15.8 mi), shallow
Epicenter
47.549° N, 121.850° 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 0.5 km horizontally, 0.6 km in depth
Depth from
From location
Station coverage gap
149°
Stations used
9

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 21 in the 30 days before it.

After

  1. 1.72 km ENE of Union Hill-Novelty Hill, Washington · 17916 days ago · 23 km deep · 19 km away
  2. 1.613 km SSW of South Cle Elum, Washington · 17914 days ago · 1 km deep · 84 km away
  3. 1.613 km NNE of Cliffdell, Washington · 17914 days ago · 7 km deep · 85 km away
  4. 1.74 km NW of Federal Way, Washington · 17914 days ago · 22 km deep · 43 km away
  5. 2.115 km NNE of Ashford, Washington · 17909 days ago · -1 km deep · 75 km away
  6. 1.56 km ESE of Lake Marcel-Stillwater, Washington · 17906 days ago · 16 km deep · 14 km away
  7. 1.74 km NE of North Bend, Washington · 17897 days ago · -1 km deep · 9 km away
  8. 1.63 km NE of Bonney Lake, Washington · 17897 days ago · 15 km deep · 45 km away
  9. 1.96 km E of Arlington Heights, Washington · 17895 days ago · 18 km deep · 72 km away
  10. 1.915 km NNE of Ashford, Washington · 17893 days ago · 4 km deep · 74 km away
  11. 1.914 km E of Wilkeson, Washington · 17889 days ago · 7 km deep · 50 km away
  12. 1.56 km SSW of Hansville, Washington · 17888 days ago · 15 km deep · 66 km away
  13. 1.64 km WNW of Mercer Island, Washington · 17885 days ago · 38 km deep · 32 km away
  14. 1.63 km NW of Suquamish, Washington · 17881 days ago · 21 km deep · 60 km away
  15. 1.81 km E of Enetai, Washington · 17880 days ago · 20 km deep · 55 km away
  16. 1.54 km E of Echo Lake, Washington · 17879 days ago · 19 km deep · 29 km away
  17. 1.82 km NNE of Carnation, Washington · 17877 days ago · 22 km deep · 14 km away
  18. 1.62 km NW of White Center, Washington · 17874 days ago · 19 km deep · 39 km away
  19. 1.625 km ENE of Ashford, Washington · 17871 days ago · 0 km deep · 78 km away
  20. 2.10 km E of Riverton, Washington · 17870 days ago · 22 km deep · 34 km away
  21. 2.42 km NNE of Coupeville, Washington · 17867 days ago · 22 km deep · 98 km away

Before

  1. 1.516 km S of Skykomish, Washington · 17924 days ago · 3 km deep · 35 km away
  2. 1.515 km NNE of Ashford, Washington · 17924 days ago · 15 km deep · 74 km away
  3. 1.717 km S of Skykomish, Washington · 17924 days ago · 3 km deep · 34 km away
  4. 1.917 km SE of Carbonado, Washington · 17925 days ago · 9 km deep · 65 km away
  5. 1.713 km SSW of South Cle Elum, Washington · 17927 days ago · 9 km deep · 83 km away
  6. 2.36 km SE of Marrowstone, Washington · 17929 days ago · 21 km deep · 78 km away
  7. 2.05 km N of Arlington Heights, Washington · 17931 days ago · 0 km deep · 80 km away
  8. 2.43 km S of Woods Creek, Washington · 17932 days ago · 2 km deep · 33 km away
  9. 1.75 km NNW of Belfair, Washington · 17936 days ago · 22 km deep · 75 km away
  10. 1.71 km WNW of Mountlake Terrace, Washington · 17936 days ago · 14 km deep · 45 km away
  11. 1.52 km NNE of Bonney Lake, Washington · 17939 days ago · 12 km deep · 46 km away
  12. 1.55 km NNW of Port Townsend, Washington · 17940 days ago · 20 km deep · 98 km away
  13. 1.74 km NE of Kingston, Washington · 17942 days ago · 18 km deep · 56 km away
  14. 1.55 km SE of Mineral, Washington · 17943 days ago · 19 km deep · 98 km away
  15. 1.51 km NNE of Lynnwood, Washington · 17945 days ago · 2 km deep · 46 km away
  16. 2.70 km W of Alderwood Manor, Washington · 17945 days ago · 14 km deep · 45 km away
  17. 2.13 km SSW of Redmond, Washington · 17946 days ago · 0 km deep · 24 km away
  18. 1.65 km S of Gorst, Washington · 17948 days ago · 22 km deep · 66 km away
  19. 2.02 km NNE of Duvall, Washington · 17949 days ago · 19 km deep · 25 km away
  20. 1.916 km WNW of Packwood, Washington · 17949 days ago · 0 km deep · 100 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10844538. Read Tue, Sep 22, 2026, 8:46 AM UTC.