Washington earthquakes

M2.5 earthquake 7 km S of Morton, Washington

A magnitude 2.5 earthquake struck 7 km S of Morton, Washington on Tue, Jan 11, 1977, 4:36 PM PST (00:36 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.9 6 km SW of Morton, 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
2.5 (md), micro
Local time
UTC
1977-01-12 00:36:39 UTC
Depth
7.6 km (4.7 mi), shallow
Epicenter
46.496° N, 122.288° 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 2.2 km horizontally, 7.0 km in depth
Magnitude uncertainty
±0.19
Depth from
Operator assigned
Station coverage gap
224°, poorly surrounded by stations
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.13 km W of Mineral, Washington · 18155 days ago · 10 km deep · 25 km away
  2. 1.92 km SW of Mineral, Washington · 18155 days ago · 5 km deep · 24 km away
  3. 1.73 km W of Mineral, Washington · 18155 days ago · 10 km deep · 26 km away
  4. 2.115 km SSE of Ashford, Washington · 18137 days ago · 42 km deep · 31 km away
  5. 2.510 km E of Kalama, Washington · 18127 days ago · 16 km deep · 62 km away
  6. 2.110 km ENE of Kalama, Washington · 18127 days ago · 0 km deep · 60 km away
  7. 2.411 km SSW of Alder, Washington · 18123 days ago · 15 km deep · 23 km away
  8. 2.412 km N of Ashford, Washington · 18119 days ago · 1 km deep · 46 km away
  9. 2.96 km SW of Morton, Washington · 18113 days ago · 20 km deep · 3 km away
  10. 2.94 km SW of Morton, Washington · 18112 days ago · 22 km deep · 4 km away
  11. 2.315 km WSW of Greenwater, Washington · 18105 days ago · 8 km deep · 75 km away
  12. 2.54 km WSW of Onalaska, Washington · 18104 days ago · 28 km deep · 38 km away
  13. 2.6Puget Sound region, Washington · 18103 days ago · 21 km deep · 93 km away

Before

  1. 2.39 km N of Greenwater, Washington · 18158 days ago · 14 km deep · 96 km away
  2. 2.313 km ENE of Ashford, Washington · 18171 days ago · 13 km deep · 47 km away
  3. 1.84 km NNW of Dash Point, Washington · 18182 days ago · 6 km deep · 96 km away
  4. 1.69 km WSW of Mineral, Washington · 18184 days ago · 17 km deep · 22 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10842963. Read Tue, Sep 29, 2026, 7:59 AM UTC.