Washington earthquakes

M1.7 earthquake 21 km S of Morton, Washington

A magnitude 1.7 earthquake struck 21 km S of Morton, Washington on Sun, Dec 1, 1974, 8:17 PM PST (04:17 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.6 19 km NE of Packwood, 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
1.7 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1974-12-02 04:17:40 UTC
Depth
7.9 km (4.9 mi), shallow
Epicenter
46.365° N, 122.240° 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 0.6 km horizontally, 1.2 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
224°, poorly surrounded by stations
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 1.512 km S of Pe Ell, Washington · 18929 days ago · -1 km deep · 80 km away
  2. 1.911 km ENE of Ashford, Washington · 18925 days ago · 3 km deep · 55 km away
  3. 2.619 km NE of Packwood, Washington · 18902 days ago · 0 km deep · 69 km away
  4. 2.419 km NE of Packwood, Washington · 18902 days ago · 9 km deep · 71 km away
  5. 2.117 km NNE of Packwood, Washington · 18899 days ago · 13 km deep · 66 km away
  6. 2.210 km ENE of Ashford, Washington · 18872 days ago · 6 km deep · 54 km away

Before

  1. 1.514 km SW of Alder, Washington · 18935 days ago · 26 km deep · 42 km away
  2. 1.819 km WSW of Packwood, Washington · 18937 days ago · 5 km deep · 32 km away
  3. 2.021 km NNE of Packwood, Washington · 18941 days ago · 3 km deep · 70 km away
  4. 2.120 km ENE of Ashford, Washington · 18945 days ago · 5 km deep · 64 km away
  5. 1.89 km ESE of Enumclaw, Washington · 18946 days ago · 8 km deep · 95 km away
  6. 2.213 km W of Packwood, Washington · 18949 days ago · 5 km deep · 39 km away
  7. 1.67 km WSW of Mineral, Washington · 18950 days ago · 25 km deep · 36 km away
  8. 2.010 km SE of Ashford, Washington · 18951 days ago · 30 km deep · 45 km away
  9. 2.85 km SE of Bucoda, Washington · 18956 days ago · 3 km deep · 63 km away
  10. 1.930 km SSE of Mossyrock, Washington · 18957 days ago · 36 km deep · 12 km away
  11. 2.214 km N of Onalaska, Washington · 18959 days ago · -1 km deep · 51 km away
  12. 1.67 km ESE of Enumclaw, Washington · 18959 days ago · 1 km deep · 95 km away
  13. 2.218 km SSE of Carbonado, Washington · 18959 days ago · 3 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10860048. Read Fri, Oct 2, 2026, 1:14 PM UTC.