Washington earthquakes

M2.4 earthquake 27 km SSE of Morton, Washington

A magnitude 2.4 earthquake struck 27 km SSE of Morton, Washington on Mon, Jun 20, 1977, 3:44 PM PDT (22:44 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.7 17 km S of Mossyrock, 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
2.4 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1977-06-20 22:44:00 UTC
Depth
8.0 km (5.0 mi), shallow
Epicenter
46.318° N, 122.195° 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 3.8 km horizontally, 8.6 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
162°
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 8 in the 30 days before it.

After

  1. 1.83 km NNE of Bonney Lake, Washington · 18000 days ago · 7 km deep · 98 km away
  2. 2.221 km ENE of Packwood, Washington · 18000 days ago · 2 km deep · 72 km away
  3. 1.71 km NNE of Bonney Lake, Washington · 17998 days ago · 14 km deep · 97 km away
  4. 2.529 km NE of Yacolt, Washington · 17996 days ago · 0 km deep · 33 km away
  5. 1.711 km SE of Carbonado, Washington · 17979 days ago · 5 km deep · 78 km away
  6. 2.717 km S of Mossyrock, Washington · 17979 days ago · 14 km deep · 23 km away
  7. 2.34 km SW of Orting, Washington · 17974 days ago · 0 km deep · 84 km away
  8. 2.013 km ENE of Ashford, Washington · 17961 days ago · 2 km deep · 61 km away
  9. 1.916 km WNW of Packwood, Washington · 17961 days ago · 0 km deep · 44 km away
  10. 1.933 km NE of Amboy, Washington · 17955 days ago · 1 km deep · 19 km away
  11. 1.55 km SE of Mineral, Washington · 17954 days ago · 19 km deep · 41 km away
  12. 1.52 km NNE of Bonney Lake, Washington · 17950 days ago · 12 km deep · 98 km away

Before

  1. 2.13 km N of Bonney Lake, Washington · 18003 days ago · 2 km deep · 99 km away
  2. 2.318 km ESE of Carbonado, Washington · 18003 days ago · -1 km deep · 80 km away
  3. 2.47 km SE of Mineral, Washington · 18003 days ago · 16 km deep · 39 km away
  4. 2.24 km NNE of Bonney Lake, Washington · 18010 days ago · 6 km deep · 99 km away
  5. 2.13 km N of Bonney Lake, Washington · 18010 days ago · 3 km deep · 99 km away
  6. 2.69 km SSW of Morton, Washington · 18015 days ago · 0 km deep · 21 km away
  7. 3.06 km SSW of Morton, Washington · 18024 days ago · 24 km deep · 22 km away
  8. 2.931 km NE of Amboy, Washington · 18031 days ago · 13 km deep · 28 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10843908. Read Sat, Oct 3, 2026, 4:06 PM UTC.