Washington earthquakes

M1.8 earthquake 11 km W of Packwood, Washington

A magnitude 1.8 earthquake struck 11 km W of Packwood, Washington on Sun, Aug 28, 1977, 10:06 PM PDT (05:06 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.4 6 km SSE of Bucoda, Washington. This one was a foreshock.

Morton 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
1.8 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1977-08-29 05:06:49 UTC
Depth
-1.2 km (-0.7 mi), shallow
Epicenter
46.624° N, 121.822° 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 1.8 km horizontally, 2.4 km in depth
Depth from
From location
Station coverage gap
243°, poorly surrounded by stations
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: 15 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 1.613 km SSW of South Cle Elum, Washington · 17924 days ago · 1 km deep · 80 km away
  2. 1.613 km NNE of Cliffdell, Washington · 17923 days ago · 7 km deep · 79 km away
  3. 1.74 km NW of Federal Way, Washington · 17923 days ago · 22 km deep · 90 km away
  4. 3.46 km SSE of Bucoda, Washington · 17921 days ago · 6 km deep · 78 km away
  5. 2.115 km NNE of Ashford, Washington · 17919 days ago · -1 km deep · 30 km away
  6. 2.06 km N of Mossyrock, Washington · 17911 days ago · 23 km deep · 50 km away
  7. 2.18 km NNE of Mossyrock, Washington · 17910 days ago · 20 km deep · 48 km away
  8. 1.74 km NE of North Bend, Washington · 17907 days ago · -1 km deep · 99 km away
  9. 1.63 km NE of Bonney Lake, Washington · 17906 days ago · 15 km deep · 69 km away
  10. 1.915 km NNE of Ashford, Washington · 17903 days ago · 4 km deep · 31 km away
  11. 1.914 km E of Wilkeson, Washington · 17898 days ago · 7 km deep · 52 km away
  12. 2.122 km N of Carson, Washington · 17897 days ago · -1 km deep · 78 km away
  13. 2.216 km ENE of Yacolt, Washington · 17891 days ago · -1 km deep · 85 km away
  14. 1.740 km SSE of Morton, Washington · 17886 days ago · 3 km deep · 49 km away
  15. 1.625 km ENE of Ashford, Washington · 17881 days ago · 0 km deep · 26 km away

Before

  1. 1.939 km SE of Morton, Washington · 17932 days ago · -1 km deep · 38 km away
  2. 1.515 km NNE of Ashford, Washington · 17933 days ago · 15 km deep · 30 km away
  3. 1.917 km SE of Carbonado, Washington · 17934 days ago · 9 km deep · 38 km away
  4. 1.713 km SSW of South Cle Elum, Washington · 17937 days ago · 9 km deep · 79 km away
  5. 1.52 km NNE of Bonney Lake, Washington · 17948 days ago · 12 km deep · 69 km away
  6. 1.55 km SE of Mineral, Washington · 17952 days ago · 19 km deep · 24 km away
  7. 1.933 km NE of Amboy, Washington · 17953 days ago · 1 km deep · 59 km away
  8. 1.916 km WNW of Packwood, Washington · 17959 days ago · 0 km deep · 5 km away
  9. 2.013 km ENE of Ashford, Washington · 17959 days ago · 2 km deep · 22 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10844553. Read Thu, Oct 1, 2026, 4:22 PM UTC.