Washington earthquakes

M1.9 earthquake 8 km SSE of Sultan, Washington

A magnitude 1.9 earthquake struck 8 km SSE of Sultan, Washington on Tue, Oct 6, 1987, 3:34 AM PDT (10:34 UTC), 14 km (8 mi) below the surface.

A larger quake followed: M2.0 55 km ESE of Darrington, Washington. This one was a foreshock.

Sultan 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
1987-10-06 10:34:03 UTC
Depth
13.6 km (8.4 mi), shallow
Epicenter
47.793° N, 121.768° 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 0.7 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
89°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.96 km SSE of Wilderness Rim, Washington · 14230 days ago · 1 km deep · 45 km away
  2. 1.68 km NNE of Snoqualmie, Washington · 14223 days ago · 10 km deep · 22 km away
  3. 1.60 km SE of Lakeland South, Washington · 14222 days ago · 16 km deep · 69 km away
  4. 1.81 km ENE of Vashon, Washington · 14212 days ago · 22 km deep · 63 km away
  5. 1.66 km E of Belfair, Washington · 14208 days ago · 19 km deep · 82 km away
  6. 1.99 km NNW of Ault Field, Washington · 14206 days ago · 52 km deep · 99 km away
  7. 1.87 km WSW of Wilderness Rim, Washington · 14204 days ago · 16 km deep · 43 km away
  8. 1.91 km SW of Rocky Point, Washington · 14203 days ago · 17 km deep · 73 km away
  9. 1.632 km SE of Darrington, Washington · 14201 days ago · 14 km deep · 48 km away
  10. 2.055 km ESE of Darrington, Washington · 14201 days ago · 0 km deep · 77 km away
  11. 1.56 km ENE of Verlot, Washington · 14198 days ago · 14 km deep · 36 km away
  12. 2.210 km N of Quilcene, Washington · 14198 days ago · 19 km deep · 83 km away
  13. 1.54 km E of Port Ludlow, Washington · 14181 days ago · 16 km deep · 65 km away
  14. 1.83 km WSW of Shoreline, Washington · 14181 days ago · 14 km deep · 46 km away
  15. 2.054 km E of Darrington, Washington · 14175 days ago · 8 km deep · 78 km away

Before

  1. 1.52 km ESE of Ames Lake, Washington · 14231 days ago · 22 km deep · 23 km away
  2. 2.16 km SSE of Wilderness Rim, Washington · 14232 days ago · 1 km deep · 45 km away
  3. 1.62 km W of Black Diamond, Washington · 14233 days ago · 13 km deep · 58 km away
  4. 1.87 km SSW of Quilcene, Washington · 14236 days ago · 47 km deep · 87 km away
  5. 2.15 km NE of Kingston, Washington · 14242 days ago · 16 km deep · 51 km away
  6. 1.61 km SW of Lake Marcel-Stillwater, Washington · 14244 days ago · 22 km deep · 17 km away
  7. 2.85 km NE of Blyn, Washington · 14247 days ago · 55 km deep · 93 km away
  8. 2.82 km N of Port Townsend, Washington · 14247 days ago · 21 km deep · 83 km away
  9. 1.79 km NNW of Marblemount, Washington · 14256 days ago · 0 km deep · 92 km away
  10. 1.710 km NW of Marblemount, Washington · 14258 days ago · -1 km deep · 92 km away
  11. 1.85 km NE of Ravensdale, Washington · 14260 days ago · 2 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10224233. Read Tue, Sep 22, 2026, 9:55 AM UTC.