Washington earthquakes

M2.8 earthquake 20 km WSW of Brinnon, Washington

A magnitude 2.8 earthquake struck 20 km WSW of Brinnon, Washington on Tue, May 21, 1985, 11:56 AM PDT (18:56 UTC), 46 km (29 mi) below the surface.

A larger quake followed: M3.1 0 km NE of Inglewood-Finn Hill, 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
2.8 (md), micro
Local time
UTC
1985-05-21 18:56:33 UTC
Depth
46.4 km (28.8 mi), shallow
Epicenter
47.596° N, 123.147° 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 0.8 km horizontally, 1.3 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
49°
Stations used
38

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 13 in the 30 days before it.

After

  1. 1.52 km W of Artondale, Washington · 15098 days ago · 24 km deep · 50 km away
  2. 2.026 km NNW of Hoodsport, Washington · 15096 days ago · 46 km deep · 11 km away
  3. 1.63 km NE of Lake Marcel-Stillwater, Washington · 15077 days ago · 26 km deep · 96 km away
  4. 1.65 km S of Monroe, Washington · 15063 days ago · -1 km deep · 91 km away
  5. 1.510 km N of Camano, Washington · 15062 days ago · 53 km deep · 88 km away
  6. 1.64 km WSW of Monroe, Washington · 15060 days ago · -1 km deep · 88 km away
  7. 2.51 km SSW of Seabeck, Washington · 15058 days ago · 20 km deep · 23 km away
  8. 3.10 km NE of Inglewood-Finn Hill, Washington · 15052 days ago · 18 km deep · 70 km away
  9. 1.51 km NE of Kingston, Washington · 15047 days ago · 21 km deep · 55 km away
  10. 1.94 km ENE of Southworth, Washington · 15046 days ago · 47 km deep · 53 km away
  11. 1.84 km WSW of Gorst, Washington · 15043 days ago · 15 km deep · 31 km away

Before

  1. 1.51 km NE of Riverton, Washington · 15099 days ago · 25 km deep · 66 km away
  2. 2.24 km NW of Kingston, Washington · 15116 days ago · 21 km deep · 52 km away
  3. 2.03 km NW of Kingston, Washington · 15117 days ago · 21 km deep · 52 km away
  4. 2.84 km NW of Kingston, Washington · 15117 days ago · 22 km deep · 52 km away
  5. 2.88 km S of Central Park, Washington · 15118 days ago · 34 km deep · 87 km away
  6. 2.04 km SSE of Seabeck, Washington · 15118 days ago · 22 km deep · 26 km away
  7. 1.65 km SE of Monroe, Washington · 15118 days ago · -1 km deep · 95 km away
  8. 2.21 km NNW of Ames Lake, Washington · 15120 days ago · 26 km deep · 88 km away
  9. 2.61 km SSE of Enetai, Washington · 15122 days ago · 26 km deep · 42 km away
  10. 2.52 km SW of Browns Point, Washington · 15124 days ago · 57 km deep · 62 km away
  11. 1.74 km SSE of Monroe, Washington · 15125 days ago · -1 km deep · 93 km away
  12. 1.65 km NNW of Woods Creek, Washington · 15125 days ago · 15 km deep · 97 km away
  13. 1.90 km SE of Clyde Hill, Washington · 15127 days ago · 26 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10191583. Read Mon, Sep 21, 2026, 9:28 PM UTC.