Washington earthquakes

M1.8 earthquake 5 km WSW of Mount Vernon, Washington

A magnitude 1.8 earthquake struck 5 km WSW of Mount Vernon, Washington on Fri, Aug 3, 1984, 8:12 PM PDT (03:12 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.1 15 km S of Port Angeles East, Washington. This one was a foreshock.

Mount Vernon 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
1984-08-04 03:12:16 UTC
Depth
5.8 km (3.6 mi), shallow
Epicenter
48.404° N, 122.403° 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 1.4 km horizontally, 2.4 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
82°
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: 31 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 1.65 km SW of Mount Vernon, Washington · 15387 days ago · 7 km deep · 1 km away
  2. 2.115 km S of Port Angeles East, Washington · 15387 days ago · 38 km deep · 85 km away
  3. 2.03 km NNW of White Center, Washington · 15386 days ago · 8 km deep · 95 km away
  4. 1.74 km W of Langford, Canada · 15385 days ago · 3 km deep · 86 km away
  5. 2.019 km W of Ault Field, Washington · 15383 days ago · 17 km deep · 39 km away
  6. 1.51 km WNW of Redmond, Washington · 15381 days ago · 23 km deep · 83 km away
  7. 2.28 km W of Brinnon, Washington · 15381 days ago · 46 km deep · 93 km away
  8. 1.54 km W of Fall City, Washington · 15379 days ago · 6 km deep · 99 km away
  9. 1.57 km SW of Camano, Washington · 15377 days ago · 28 km deep · 34 km away
  10. 1.52 km NW of Kingston, Washington · 15377 days ago · 52 km deep · 66 km away
  11. 1.611 km SSW of Port Angeles East, Washington · 15374 days ago · 38 km deep · 88 km away
  12. 1.94 km WSW of Monroe, Washington · 15372 days ago · -1 km deep · 68 km away
  13. 1.70 km NW of Kendall, Washington · 15371 days ago · 11 km deep · 61 km away
  14. 2.28 km NNW of Ault Field, Washington · 15365 days ago · 50 km deep · 22 km away
  15. 1.610 km E of Acme, Washington · 15365 days ago · 5 km deep · 41 km away
  16. 1.62 km NNW of La Conner, Washington · 15364 days ago · 17 km deep · 8 km away
  17. 2.622 km ENE of North Saanich, Canada · 15360 days ago · 57 km deep · 67 km away
  18. 1.59 km ESE of Verlot, Washington · 15358 days ago · 1 km deep · 67 km away
  19. 2.21 km NW of White Center, Washington · 15358 days ago · 22 km deep · 97 km away
  20. 1.74 km NE of Woods Creek, Washington · 15358 days ago · -1 km deep · 69 km away
  21. 2.22 km SW of Roosevelt, Washington · 15357 days ago · 17 km deep · 65 km away
  22. 1.71 km N of Lake Ketchum, Washington · 15356 days ago · 15 km deep · 13 km away
  23. 1.93 km WNW of Bryant, Washington · 15352 days ago · 19 km deep · 22 km away
  24. 3.06 km SW of Camano, Washington · 15344 days ago · 2 km deep · 32 km away
  25. 1.72 km E of Sammamish, Washington · 15344 days ago · 11 km deep · 88 km away
  26. 1.81 km ESE of Clyde Hill, Washington · 15344 days ago · 0 km deep · 88 km away
  27. 2.16 km SSW of Sultan, Washington · 15340 days ago · 9 km deep · 78 km away
  28. 1.67 km WNW of Lofall, Washington · 15336 days ago · 51 km deep · 69 km away
  29. 1.56 km S of Bell Hill, Washington · 15336 days ago · -1 km deep · 69 km away
  30. 1.71 km N of Bay View, Washington · 15335 days ago · 14 km deep · 12 km away
  31. 2.18 km E of Verlot, Washington · 15330 days ago · 2 km deep · 66 km away

Before

  1. 1.53 km NW of Jamestown, Washington · 15390 days ago · 45 km deep · 60 km away
  2. 1.74 km ENE of Granite Falls, Washington · 15391 days ago · -1 km deep · 50 km away
  3. 2.02 km SSW of Machias, Washington · 15391 days ago · 11 km deep · 56 km away
  4. 2.24 km WNW of Fall City, Washington · 15394 days ago · -1 km deep · 97 km away
  5. 1.51 km N of Fall City, Washington · 15394 days ago · 0 km deep · 99 km away
  6. 2.219 km NNE of Index, Washington · 15395 days ago · 2 km deep · 82 km away
  7. 2.018 km N of Index, Washington · 15395 days ago · 1 km deep · 81 km away
  8. 2.218 km NE of Ganges, Canada · 15398 days ago · 55 km deep · 94 km away
  9. 2.76 km WSW of Shoreline, Washington · 15400 days ago · 21 km deep · 74 km away
  10. 2.48 km N of Lyman, Washington · 15410 days ago · 0 km deep · 34 km away
  11. 1.54 km S of Everson, Washington · 15412 days ago · 15 km deep · 53 km away
  12. 1.98 km ESE of Quilcene, Washington · 15413 days ago · 22 km deep · 72 km away
  13. 1.73 km ENE of Granite Falls, Washington · 15414 days ago · 1 km deep · 50 km away
  14. 2.99 km N of Lyman, Washington · 15414 days ago · 2 km deep · 34 km away
  15. 2.25 km WNW of Gorst, Washington · 15416 days ago · 46 km deep · 100 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10177803. Read Tue, Sep 22, 2026, 12:17 PM UTC.