Washington earthquakes

M1.8 earthquake 7 km WNW of Gorst, Washington

A magnitude 1.8 earthquake struck 7 km WNW of Gorst, Washington on Mon, Aug 10, 1987, 5:07 PM PDT (00:07 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M2.6 16 km WSW of Alder, Washington. This one was a foreshock.

Gorst 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
1.8 (md), micro
Local time
UTC
1987-08-11 00:07:17 UTC
Depth
11.4 km (7.1 mi), shallow
Epicenter
47.561° N, 122.794° 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, 0.5 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
56°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.715 km ESE of Oak Bay, Canada · 14278 days ago · 5 km deep · 96 km away
  2. 1.57 km ESE of Ravensdale, Washington · 14278 days ago · -1 km deep · 73 km away
  3. 1.72 km N of Black Diamond, Washington · 14278 days ago · 18 km deep · 65 km away
  4. 1.81 km NNW of Tanner, Washington · 14275 days ago · 9 km deep · 79 km away
  5. 1.83 km NW of Bainbridge Island, Washington · 14264 days ago · 20 km deep · 20 km away
  6. 1.85 km NE of Ravensdale, Washington · 14260 days ago · 2 km deep · 69 km away
  7. 2.616 km WSW of Alder, Washington · 14253 days ago · 18 km deep · 97 km away
  8. 2.82 km N of Port Townsend, Washington · 14247 days ago · 21 km deep · 64 km away
  9. 2.85 km NE of Blyn, Washington · 14247 days ago · 55 km deep · 56 km away
  10. 1.61 km SW of Lake Marcel-Stillwater, Washington · 14245 days ago · 22 km deep · 67 km away
  11. 2.15 km NE of Kingston, Washington · 14242 days ago · 16 km deep · 40 km away
  12. 1.87 km SSW of Quilcene, Washington · 14236 days ago · 47 km deep · 25 km away
  13. 1.62 km W of Black Diamond, Washington · 14234 days ago · 13 km deep · 63 km away
  14. 2.16 km SSE of Wilderness Rim, Washington · 14232 days ago · 1 km deep · 81 km away
  15. 1.52 km ESE of Ames Lake, Washington · 14231 days ago · 22 km deep · 65 km away
  16. 1.98 km SSE of Sultan, Washington · 14231 days ago · 14 km deep · 81 km away
  17. 1.96 km SSE of Wilderness Rim, Washington · 14230 days ago · 1 km deep · 81 km away

Before

  1. 2.71 km N of Port Townsend, Washington · 14292 days ago · 22 km deep · 63 km away
  2. 1.55 km NNE of Duvall, Washington · 14293 days ago · 23 km deep · 68 km away
  3. 1.61 km ESE of Lake Marcel-Stillwater, Washington · 14293 days ago · 0 km deep · 69 km away
  4. 1.85 km NE of Tanner, Washington · 14298 days ago · 13 km deep · 82 km away
  5. 2.711 km ENE of Hoodsport, Washington · 14304 days ago · 15 km deep · 21 km away
  6. 1.54 km SSW of Big Lake, Washington · 14308 days ago · 18 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10222133. Read Tue, Sep 22, 2026, 2:16 PM UTC.