Washington earthquakes

M1.9 earthquake 39 km SE of Morton, Washington

A magnitude 1.9 earthquake struck 39 km SE of Morton, Washington on Sat, Aug 27, 1977, 9:03 AM PDT (16:03 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
1.9 (md), micro
Local time
UTC
1977-08-27 16:03:13 UTC
Depth
-1.4 km (-0.9 mi), shallow
Epicenter
46.292° N, 121.945° 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 1.7 km horizontally, 2.4 km in depth
Depth from
From location
Station coverage gap
228°, poorly surrounded by stations
Stations used
6

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.912 km NE of East Cathlamet, Washington · 17922 days ago · 23 km deep · 100 km away
  2. 1.811 km W of Packwood, Washington · 17921 days ago · -1 km deep · 38 km away
  3. 3.46 km SSE of Bucoda, Washington · 17912 days ago · 6 km deep · 85 km away
  4. 2.115 km NNE of Ashford, Washington · 17910 days ago · -1 km deep · 65 km away
  5. 2.06 km N of Mossyrock, Washington · 17902 days ago · 23 km deep · 53 km away
  6. 2.18 km NNE of Mossyrock, Washington · 17901 days ago · 20 km deep · 52 km away
  7. 1.915 km NNE of Ashford, Washington · 17894 days ago · 4 km deep · 66 km away
  8. 1.914 km E of Wilkeson, Washington · 17889 days ago · 7 km deep · 90 km away
  9. 2.122 km N of Carson, Washington · 17888 days ago · -1 km deep · 42 km away
  10. 2.216 km ENE of Yacolt, Washington · 17882 days ago · -1 km deep · 47 km away
  11. 1.740 km SSE of Morton, Washington · 17877 days ago · 3 km deep · 14 km away
  12. 1.625 km ENE of Ashford, Washington · 17871 days ago · 0 km deep · 64 km away

Before

  1. 1.515 km NNE of Ashford, Washington · 17924 days ago · 15 km deep · 66 km away
  2. 1.917 km SE of Carbonado, Washington · 17925 days ago · 9 km deep · 75 km away
  3. 1.55 km SE of Mineral, Washington · 17943 days ago · 19 km deep · 46 km away
  4. 1.933 km NE of Amboy, Washington · 17944 days ago · 1 km deep · 24 km away
  5. 1.916 km WNW of Packwood, Washington · 17950 days ago · 0 km deep · 40 km away
  6. 2.013 km ENE of Ashford, Washington · 17950 days ago · 2 km deep · 59 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10844533. Read Tue, Sep 22, 2026, 3:11 PM UTC.