Washington earthquakes

M1.7 earthquake 15 km W of Brinnon, Washington

A magnitude 1.7 earthquake struck 15 km W of Brinnon, Washington on Sat, Sep 28, 1991, 3:35 PM PDT (22:35 UTC), 43 km (26 mi) below the surface.

A larger quake followed: M3.4 14 km ENE of Aberdeen Gardens, Washington. This one was a foreshock.

Brinnon 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
1991-09-28 22:35:41 UTC
Depth
42.6 km (26.5 mi), shallow
Epicenter
47.661° N, 123.100° 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 1.2 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
48°
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 2.413 km SSW of Blyn, Washington · 12779 days ago · 42 km deep · 29 km away
  2. 1.85 km NNE of Kingston, Washington · 12773 days ago · 22 km deep · 52 km away
  3. 1.59 km NNW of Ault Field, Washington · 12768 days ago · 50 km deep · 89 km away
  4. 1.52 km NW of Maple Valley, Washington · 12767 days ago · 17 km deep · 82 km away
  5. 3.414 km ENE of Aberdeen Gardens, Washington · 12761 days ago · 38 km deep · 71 km away
  6. 1.937 km S of Port Angeles East, Washington · 12756 days ago · 11 km deep · 26 km away
  7. 1.95 km E of Black Diamond, Washington · 12755 days ago · 2 km deep · 96 km away
  8. 1.52 km NNE of Eastmont, Washington · 12750 days ago · 16 km deep · 76 km away
  9. 1.62 km WSW of McChord Air Force Base, Washington · 12743 days ago · 50 km deep · 74 km away
  10. 2.02 km ESE of Des Moines, Washington · 12740 days ago · 12 km deep · 68 km away
  11. 2.42 km NE of Eastmont, Washington · 12729 days ago · 18 km deep · 76 km away

Before

  1. 2.05 km NNE of Lake Marcel-Stillwater, Washington · 12789 days ago · 17 km deep · 90 km away
  2. 1.65 km NW of Federal Way, Washington · 12790 days ago · 14 km deep · 65 km away
  3. 2.04 km SSE of Grapeview, Washington · 12793 days ago · 18 km deep · 46 km away
  4. 1.68 km ENE of Lake Marcel-Stillwater, Washington · 12794 days ago · 3 km deep · 97 km away
  5. 2.04 km NE of Bryant, Washington · 12795 days ago · 11 km deep · 100 km away
  6. 1.62 km WNW of Sammamish, Washington · 12796 days ago · -1 km deep · 75 km away
  7. 1.74 km NE of White Center, Washington · 12800 days ago · 27 km deep · 61 km away
  8. 1.90 km SE of Erlands Point-Kitsap Lake, Washington · 12802 days ago · 3 km deep · 31 km away
  9. 2.41 km ESE of Erlands Point-Kitsap Lake, Washington · 12802 days ago · 2 km deep · 32 km away
  10. 1.70 km S of Erlands Point-Kitsap Lake, Washington · 12802 days ago · 5 km deep · 31 km away
  11. 2.20 km SE of Erlands Point-Kitsap Lake, Washington · 12805 days ago · 2 km deep · 31 km away
  12. 1.60 km ENE of Erlands Point-Kitsap Lake, Washington · 12807 days ago · 2 km deep · 31 km away
  13. 1.84 km NW of Marrowstone, Washington · 12808 days ago · 53 km deep · 54 km away
  14. 2.01 km SE of Erlands Point-Kitsap Lake, Washington · 12808 days ago · 5 km deep · 32 km away
  15. 1.63 km SE of Lake Marcel-Stillwater, WA · 12809 days ago · 7 km deep · 91 km away
  16. 1.53 km SSW of Des Moines, Washington · 12813 days ago · 18 km deep · 65 km away
  17. 2.01 km NW of Lake Roesiger, Washington · 12817 days ago · 11 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10282808. Read Fri, Oct 2, 2026, 9:46 AM UTC.