Washington earthquakes

M1.9 earthquake 5 km SW of Lyman, Washington

A magnitude 1.9 earthquake struck 5 km SW of Lyman, Washington on Wed, May 21, 1975, 11:59 PM PDT (06:59 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.1 Washington. This one was a foreshock.

Sedro-Woolley 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), micro
Local time
UTC
1975-05-22 06:59:58 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
48.489° N, 122.117° 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 0.5 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
133°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 1.75 km SSE of Keyport, Washington · 18744 days ago · 18 km deep · 99 km away
  2. 1.71 km ENE of Quilcene, Washington · 18735 days ago · 48 km deep · 92 km away
  3. 1.74 km WSW of Woodway, Washington · 18734 days ago · 12 km deep · 83 km away
  4. 1.51 km SW of Lynnwood, Washington · 18732 days ago · 5 km deep · 77 km away
  5. 1.72 km W of Suquamish, Washington · 18729 days ago · 3 km deep · 91 km away
  6. 1.51 km SSW of Burlington, Washington · 18725 days ago · 22 km deep · 16 km away
  7. 1.61 km S of Wilburton, Washington · 18720 days ago · 17 km deep · 100 km away
  8. 1.62 km ESE of Lake Cavanaugh, Washington · 18720 days ago · 9 km deep · 21 km away
  9. 1.92 km NW of Carlsborg, Washington · 18719 days ago · 45 km deep · 91 km away
  10. 2.1Washington · 18713 days ago · 12 km deep · 64 km away
  11. 2.02 km ESE of Duvall, Washington · 18712 days ago · 16 km deep · 85 km away
  12. 1.92 km S of Lake Marcel-Stillwater, Washington · 18711 days ago · 18 km deep · 92 km away
  13. 2.113 km SE of Verlot, Washington · 18703 days ago · -1 km deep · 63 km away
  14. 1.56 km NE of Bryant, Washington · 18699 days ago · 11 km deep · 23 km away
  15. 2.22 km S of Startup, Washington · 18692 days ago · -1 km deep · 77 km away
  16. 1.84 km SSE of Monroe, Washington · 18692 days ago · 12 km deep · 76 km away

Before

  1. 2.05 km NNE of Startup, Washington · 18771 days ago · 26 km deep · 71 km away
  2. 1.51 km NW of Marietta, Washington · 18775 days ago · 3 km deep · 49 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10862603. Read Tue, Sep 22, 2026, 10:00 AM UTC.