Washington earthquakes

M1.5 earthquake 4 km N of Seattle, Washington

A magnitude 1.5 earthquake struck 4 km N of Seattle, Washington on Fri, Aug 23, 1985, 8:31 PM PDT (03:31 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M1.8 1 km NNE 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
1985-08-24 03:31:02 UTC
Depth
21.4 km (13.3 mi), shallow
Epicenter
47.642° N, 122.335° 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 0.4 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
49°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 20 in the 30 days before it.

After

  1. 1.55 km SSE of Edison, Washington · 15001 days ago · 15 km deep · 98 km away
  2. 1.51 km ESE of Keyport, Washington · 14997 days ago · 23 km deep · 21 km away
  3. 1.81 km NNE of Port Townsend, Washington · 14997 days ago · 20 km deep · 62 km away
  4. 2.32 km ENE of Keyport, Washington · 14994 days ago · 19 km deep · 20 km away
  5. 1.822 km E of Skykomish, Washington · 14988 days ago · 0 km deep · 95 km away
  6. 1.65 km NNW of Maplewood, Washington · 14987 days ago · 17 km deep · 28 km away
  7. 2.52 km SW of Des Moines, Washington · 14987 days ago · 14 km deep · 28 km away
  8. 1.52 km SW of Des Moines, Washington · 14986 days ago · 15 km deep · 28 km away
  9. 2.37 km SSE of Carbonado, Washington · 14985 days ago · 14 km deep · 74 km away
  10. 1.812 km W of Greenwater, Washington · 14983 days ago · 14 km deep · 66 km away
  11. 3.04 km WSW of Des Moines, Washington · 14983 days ago · 19 km deep · 28 km away
  12. 1.85 km E of Hobart, Washington · 14980 days ago · 10 km deep · 40 km away
  13. 2.21 km SSW of Mount Vernon, Washington · 14979 days ago · 16 km deep · 85 km away
  14. 1.51 km NNW of Freeland, Washington · 14977 days ago · 18 km deep · 45 km away
  15. 2.03 km SSE of Issaquah, Washington · 14976 days ago · -1 km deep · 28 km away
  16. 2.63 km NW of Redmond, Washington · 14973 days ago · 8 km deep · 15 km away
  17. 1.53 km S of Monroe, Washington · 14971 days ago · -1 km deep · 34 km away
  18. 2.23 km S of Issaquah, Washington · 14971 days ago · 0 km deep · 28 km away
  19. 1.516 km SE of Darrington, Washington · 14971 days ago · 9 km deep · 89 km away
  20. 1.82 km WNW of Navy Yard City, Washington · 14970 days ago · 13 km deep · 28 km away
  21. 2.43 km NW of Burien, Washington · 14969 days ago · 23 km deep · 17 km away
  22. 2.02 km NW of Burien, Washington · 14969 days ago · 22 km deep · 17 km away
  23. 1.6Washington · 14968 days ago · 27 km deep · 99 km away
  24. 1.83 km SSW of Swede Heaven, Washington · 14968 days ago · 2 km deep · 81 km away
  25. 2.117 km ESE of Carbonado, Washington · 14966 days ago · 16 km deep · 80 km away
  26. 1.5Washington · 14964 days ago · -1 km deep · 97 km away
  27. 2.87 km N of Quilcene, Washington · 14960 days ago · 20 km deep · 49 km away
  28. 2.07 km WNW of Gorst, Washington · 14956 days ago · 21 km deep · 37 km away
  29. 1.94 km E of Granite Falls, Washington · 14953 days ago · -1 km deep · 59 km away
  30. 2.70 km ENE of Riverbend, Washington · 14951 days ago · 15 km deep · 48 km away
  31. 2.69 km W of Belfair, Washington · 14949 days ago · 15 km deep · 52 km away

Before

  1. 1.83 km NNW of Seabeck, Washington · 15005 days ago · 50 km deep · 38 km away
  2. 1.612 km ESE of Enumclaw, Washington · 15008 days ago · 1 km deep · 66 km away
  3. 1.61 km NW of Lake Roesiger, Washington · 15010 days ago · 12 km deep · 49 km away
  4. 1.72 km SSE of Crocker, Washington · 15013 days ago · 0 km deep · 67 km away
  5. 1.58 km SSE of Greenwater, Washington · 15015 days ago · 0 km deep · 83 km away
  6. 1.6Puget Sound region, Washington · 15019 days ago · 0 km deep · 71 km away
  7. 1.515 km E of Greenwater, Washington · 15021 days ago · -1 km deep · 86 km away
  8. 1.54 km SW of Swede Heaven, Washington · 15021 days ago · 4 km deep · 80 km away
  9. 1.67 km NE of Ashford, Washington · 15022 days ago · 10 km deep · 97 km away
  10. 2.013 km E of Wilkeson, Washington · 15024 days ago · 10 km deep · 71 km away
  11. 1.64 km WSW of Monroe, Washington · 15025 days ago · -1 km deep · 31 km away
  12. 1.53 km SW of Mirrormont, Washington · 15026 days ago · 21 km deep · 33 km away
  13. 1.97 km SSE of Carbonado, Washington · 15026 days ago · 15 km deep · 74 km away
  14. 2.33 km SW of Swede Heaven, Washington · 15027 days ago · 2 km deep · 81 km away
  15. 1.84 km SSW of Swede Heaven, Washington · 15027 days ago · 2 km deep · 80 km away
  16. 1.74 km SSW of Swede Heaven, Washington · 15028 days ago · 0 km deep · 81 km away
  17. 2.03 km E of Granite Falls, Washington · 15029 days ago · -1 km deep · 59 km away
  18. 3.23 km SW of Swede Heaven, Washington · 15029 days ago · 2 km deep · 81 km away
  19. 1.84 km WSW of Wilderness Rim, Washington · 15032 days ago · 17 km deep · 45 km away
  20. 1.722 km S of Greenwater, Washington · 15032 days ago · 19 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10195813. Read Tue, Sep 22, 2026, 12:06 AM UTC.