Washington earthquakes

M1.5 earthquake 5 km NNE of Duvall, Washington

A magnitude 1.5 earthquake struck 5 km NNE of Duvall, Washington on Wed, Aug 5, 1987, 8:50 AM PDT (15:50 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M2.8 2 km N of Port Townsend, Washington. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.5 (md), micro
Local time
UTC
1987-08-05 15:50:08 UTC
Depth
22.9 km (14.3 mi), shallow
Epicenter
47.783° N, 121.947° 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, 0.4 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
67°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.71 km N of Port Townsend, Washington · 14299 days ago · 22 km deep · 72 km away
  2. 1.87 km WNW of Gorst, Washington · 14295 days ago · 11 km deep · 68 km away
  3. 1.57 km ESE of Ravensdale, Washington · 14285 days ago · -1 km deep · 52 km away
  4. 1.72 km N of Black Diamond, Washington · 14285 days ago · 18 km deep · 50 km away
  5. 1.81 km NNW of Tanner, Washington · 14283 days ago · 9 km deep · 36 km away
  6. 1.96 km SSE of Concrete, Washington · 14276 days ago · 2 km deep · 80 km away
  7. 2.136 km NE of Skykomish, Washington · 14272 days ago · 0 km deep · 71 km away
  8. 1.736 km NE of Skykomish, Washington · 14272 days ago · 0 km deep · 70 km away
  9. 1.83 km NW of Bainbridge Island, Washington · 14271 days ago · 20 km deep · 48 km away
  10. 1.85 km NE of Ravensdale, Washington · 14267 days ago · 2 km deep · 45 km away
  11. 1.710 km NW of Marblemount, Washington · 14265 days ago · -1 km deep · 96 km away
  12. 1.79 km NNW of Marblemount, Washington · 14264 days ago · 0 km deep · 97 km away
  13. 2.82 km N of Port Townsend, Washington · 14255 days ago · 21 km deep · 72 km away
  14. 2.85 km NE of Blyn, Washington · 14255 days ago · 55 km deep · 81 km away
  15. 1.61 km SW of Lake Marcel-Stillwater, Washington · 14252 days ago · 22 km deep · 11 km away
  16. 2.15 km NE of Kingston, Washington · 14250 days ago · 16 km deep · 38 km away
  17. 1.87 km SSW of Quilcene, Washington · 14244 days ago · 47 km deep · 73 km away
  18. 1.62 km W of Black Diamond, Washington · 14241 days ago · 13 km deep · 54 km away

Before

  1. 1.61 km ESE of Lake Marcel-Stillwater, Washington · 14301 days ago · 0 km deep · 11 km away
  2. 1.66 km WSW of Easton, Washington · 14301 days ago · 20 km deep · 82 km away
  3. 1.85 km NE of Tanner, Washington · 14306 days ago · 13 km deep · 35 km away
  4. 2.711 km ENE of Hoodsport, Washington · 14312 days ago · 15 km deep · 87 km away
  5. 1.54 km SSW of Big Lake, Washington · 14316 days ago · 18 km deep · 69 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10221123. Read Wed, Sep 30, 2026, 2:13 AM UTC.