Washington earthquakes

M1.7 earthquake 5 km NNE of Vaughn, Washington

A magnitude 1.7 earthquake struck 5 km NNE of Vaughn, Washington on Thu, Feb 20, 1975, 3:35 PM PST (23:35 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M4.0 10 km SSW of Seabeck, Washington. This one was a foreshock.

Vaughn 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), micro
Local time
UTC
1975-02-20 23:35:57 UTC
Depth
22.3 km (13.9 mi), shallow
Epicenter
47.397° N, 122.744° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
146°
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: 12 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.54 km NW of Wauna, Washington · 18843 days ago · 23 km deep · 5 km away
  2. 1.913 km W of Quilcene, Washington · 18842 days ago · 27 km deep · 54 km away
  3. 2.05 km SW of Wilderness Rim, Washington · 18838 days ago · 19 km deep · 69 km away
  4. 1.918 km SSE of Carbonado, Washington · 18834 days ago · 6 km deep · 79 km away
  5. 2.18 km WSW of Lofall, Washington · 18830 days ago · 19 km deep · 44 km away
  6. 2.83 km NW of Black Diamond, Washington · 18823 days ago · 20 km deep · 54 km away
  7. 2.13 km NE of Dash Point, Washington · 18812 days ago · 14 km deep · 28 km away
  8. 1.88 km W of Longbranch, Washington · 18810 days ago · 8 km deep · 24 km away
  9. 2.22 km NNE of Riverton, Washington · 18809 days ago · 25 km deep · 37 km away
  10. 3.711 km SW of Greenwater, Washington · 18801 days ago · 6 km deep · 83 km away
  11. 2.817 km ESE of Carbonado, Washington · 18801 days ago · -1 km deep · 79 km away
  12. 4.010 km SSW of Seabeck, Washington · 18795 days ago · 40 km deep · 21 km away

Before

  1. 2.01 km WSW of Mirrormont, Washington · 18865 days ago · 14 km deep · 55 km away
  2. 1.81 km WNW of Snoqualmie, Washington · 18866 days ago · 15 km deep · 69 km away
  3. 1.92 km NW of Redmond, Washington · 18869 days ago · 7 km deep · 55 km away
  4. 2.210 km ENE of Ashford, Washington · 18870 days ago · 6 km deep · 92 km away
  5. 2.13 km S of Issaquah, Washington · 18879 days ago · 15 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10860458. Read Wed, Sep 30, 2026, 7:37 AM UTC.