Washington earthquakes

M1.9 earthquake 2 km NE of Riverton, Washington

A magnitude 1.9 earthquake struck 2 km NE of Riverton, Washington on Sat, Nov 30, 1974, 7:28 PM PST (03:28 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M2.9 0 km NNE of Seattle, Washington. This one was a foreshock.

Riverton 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, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1974-12-01 03:28:50 UTC
Depth
25.0 km (15.5 mi), shallow
Epicenter
47.500° N, 122.279° 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, 0.9 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
74°
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: 13 in the 60 days after this one and 24 in the 30 days before it.

After

  1. 2.90 km NNE of Seattle, Washington · 18934 days ago · -1 km deep · 13 km away
  2. 1.62 km WNW of Bryn Mawr-Skyway, Washington · 18932 days ago · 27 km deep · 1 km away
  3. 1.911 km ENE of Ashford, Washington · 18925 days ago · 3 km deep · 83 km away
  4. 1.51 km NNE of Riverton, Washington · 18905 days ago · 25 km deep · 0 km away
  5. 2.42 km W of Wauna, Washington · 18904 days ago · 33 km deep · 33 km away
  6. 1.93 km WSW of Wilderness Rim, Washington · 18901 days ago · 20 km deep · 35 km away
  7. 1.54 km WSW of Keyport, Washington · 18900 days ago · 17 km deep · 36 km away
  8. 2.117 km NNE of Packwood, Washington · 18900 days ago · 13 km deep · 98 km away
  9. 2.52 km SW of Kenmore, Washington · 18898 days ago · 15 km deep · 27 km away
  10. 2.01 km N of Riverton, Washington · 18896 days ago · 21 km deep · 1 km away
  11. 2.313 km SE of Skykomish, Washington · 18885 days ago · 15 km deep · 78 km away
  12. 2.60 km N of Riverton, Washington · 18883 days ago · 24 km deep · 2 km away
  13. 2.13 km S of Issaquah, Washington · 18881 days ago · 15 km deep · 18 km away

Before

  1. 1.63 km NNW of Bryn Mawr-Skyway, Washington · 18934 days ago · 30 km deep · 3 km away
  2. 1.514 km SW of Alder, Washington · 18935 days ago · 26 km deep · 88 km away
  3. 1.52 km NNW of Gorst, Washington · 18935 days ago · 17 km deep · 33 km away
  4. 1.80 km W of Fobes Hill, Washington · 18937 days ago · 9 km deep · 51 km away
  5. 2.021 km NNE of Packwood, Washington · 18941 days ago · 3 km deep · 97 km away
  6. 2.120 km ENE of Ashford, Washington · 18945 days ago · 5 km deep · 80 km away
  7. 1.89 km ESE of Enumclaw, Washington · 18946 days ago · 8 km deep · 47 km away
  8. 1.94 km ESE of Cathcart, Washington · 18948 days ago · 16 km deep · 41 km away
  9. 1.511 km N of Quilcene, Washington · 18948 days ago · 23 km deep · 65 km away
  10. 1.51 km W of Monroe, Washington · 18949 days ago · -1 km deep · 45 km away
  11. 1.82 km ESE of Snoqualmie, Washington · 18949 days ago · 10 km deep · 36 km away
  12. 1.67 km WSW of Mineral, Washington · 18950 days ago · 25 km deep · 91 km away
  13. 1.98 km ESE of Lake Roesiger, Washington · 18950 days ago · 8 km deep · 62 km away
  14. 2.03 km W of Belfair, Washington · 18951 days ago · -1 km deep · 45 km away
  15. 2.010 km SE of Ashford, Washington · 18951 days ago · 30 km deep · 92 km away
  16. 2.33 km SSE of Issaquah, Washington · 18953 days ago · 21 km deep · 20 km away
  17. 2.85 km SE of Bucoda, Washington · 18956 days ago · 3 km deep · 92 km away
  18. 2.4Washington · 18957 days ago · -1 km deep · 76 km away
  19. 2.31 km W of Hobart, Washington · 18958 days ago · 19 km deep · 23 km away
  20. 2.214 km N of Onalaska, Washington · 18959 days ago · -1 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10860023. Read Fri, Oct 2, 2026, 6:49 PM UTC.