Washington earthquakes

M2.0 earthquake 18 km N of Index, Washington

A magnitude 2.0 earthquake struck 18 km N of Index, Washington on Sat, Jul 28, 1984, 9:50 PM PDT (04:50 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.0 22 km WNW of Leavenworth, 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
2.0 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1984-07-29 04:50:37 UTC
Depth
0.8 km (0.5 mi), shallow
Epicenter
47.984° N, 121.512° 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, 3.0 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
160°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 38 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.219 km NNE of Index, Washington · 15405 days ago · 2 km deep · 1 km away
  2. 1.51 km N of Fall City, Washington · 15404 days ago · 0 km deep · 53 km away
  3. 2.24 km WNW of Fall City, Washington · 15404 days ago · -1 km deep · 55 km away
  4. 2.02 km SSW of Machias, Washington · 15401 days ago · 11 km deep · 41 km away
  5. 1.74 km ENE of Granite Falls, Washington · 15401 days ago · -1 km deep · 32 km away
  6. 1.85 km WSW of Mount Vernon, Washington · 15400 days ago · 6 km deep · 81 km away
  7. 1.65 km SW of Mount Vernon, Washington · 15397 days ago · 7 km deep · 80 km away
  8. 2.03 km NNW of White Center, Washington · 15396 days ago · 8 km deep · 80 km away
  9. 1.92 km NW of Lakeland South, Washington · 15396 days ago · 9 km deep · 97 km away
  10. 1.8Puget Sound region, Washington · 15392 days ago · 18 km deep · 87 km away
  11. 1.51 km WNW of Redmond, Washington · 15391 days ago · 23 km deep · 58 km away
  12. 1.54 km W of Fall City, Washington · 15390 days ago · 6 km deep · 56 km away
  13. 1.57 km SW of Camano, Washington · 15388 days ago · 28 km deep · 83 km away
  14. 1.52 km NW of Kingston, Washington · 15388 days ago · 52 km deep · 77 km away
  15. 1.732 km NNW of Leavenworth, Washington · 15388 days ago · 8 km deep · 55 km away
  16. 1.72 km SW of Wilderness Rim, Washington · 15385 days ago · 19 km deep · 65 km away
  17. 1.811 km ESE of Black Diamond, Washington · 15384 days ago · 12 km deep · 84 km away
  18. 1.94 km WSW of Monroe, Washington · 15382 days ago · -1 km deep · 41 km away
  19. 1.53 km SW of Wilderness Rim, Washington · 15382 days ago · 17 km deep · 66 km away
  20. 3.022 km WNW of Leavenworth, Washington · 15380 days ago · 0 km deep · 56 km away
  21. 1.93 km SSW of Vashon, Washington · 15378 days ago · 19 km deep · 96 km away
  22. 1.610 km E of Acme, Washington · 15375 days ago · 5 km deep · 90 km away
  23. 1.62 km NNW of La Conner, Washington · 15374 days ago · 17 km deep · 88 km away
  24. 1.918 km W of Entiat, Washington · 15372 days ago · 19 km deep · 86 km away
  25. 1.59 km ESE of Verlot, Washington · 15368 days ago · 1 km deep · 14 km away
  26. 2.21 km NW of White Center, Washington · 15368 days ago · 22 km deep · 82 km away
  27. 1.74 km NE of Woods Creek, Washington · 15368 days ago · -1 km deep · 27 km away
  28. 1.812 km WNW of Greenwater, Washington · 15368 days ago · 16 km deep · 89 km away
  29. 2.22 km SW of Roosevelt, Washington · 15367 days ago · 17 km deep · 41 km away
  30. 1.71 km N of Lake Ketchum, Washington · 15366 days ago · 15 km deep · 71 km away
  31. 1.93 km WNW of Bryant, Washington · 15362 days ago · 19 km deep · 59 km away
  32. 3.06 km SW of Camano, Washington · 15354 days ago · 2 km deep · 82 km away
  33. 1.72 km E of Sammamish, Washington · 15354 days ago · 11 km deep · 55 km away
  34. 1.81 km ESE of Clyde Hill, Washington · 15354 days ago · 0 km deep · 65 km away
  35. 2.70 km NE of Boulevard Park, Washington · 15353 days ago · 26 km deep · 81 km away
  36. 2.16 km SSW of Sultan, Washington · 15350 days ago · 9 km deep · 31 km away
  37. 1.67 km WNW of Lofall, Washington · 15346 days ago · 51 km deep · 94 km away
  38. 1.71 km N of Bay View, Washington · 15346 days ago · 14 km deep · 91 km away

Before

  1. 1.99 km SSE of Leavenworth, Washington · 15406 days ago · 0 km deep · 85 km away
  2. 2.76 km WSW of Shoreline, Washington · 15410 days ago · 21 km deep · 73 km away
  3. 2.16 km S of Wilderness Rim, Washington · 15412 days ago · 18 km deep · 69 km away
  4. 1.77 km S of Easton, Washington · 15415 days ago · -1 km deep · 93 km away
  5. 2.48 km N of Lyman, Washington · 15421 days ago · 0 km deep · 80 km away
  6. 1.98 km ESE of Quilcene, Washington · 15424 days ago · 22 km deep · 96 km away
  7. 1.52 km SW of Lake Morton-Berrydale, Washington · 15424 days ago · 50 km deep · 87 km away
  8. 1.73 km ENE of Granite Falls, Washington · 15424 days ago · 1 km deep · 33 km away
  9. 2.99 km N of Lyman, Washington · 15424 days ago · 2 km deep · 81 km away
  10. 1.87 km E of Greenwater, Washington · 15425 days ago · -1 km deep · 93 km away
  11. 1.93 km SSW of Swede Heaven, Washington · 15430 days ago · 2 km deep · 35 km away
  12. 2.03 km SSE of Swede Heaven, Washington · 15431 days ago · -1 km deep · 34 km away
  13. 2.16 km NNW of Freeland, Washington · 15431 days ago · 29 km deep · 78 km away
  14. 1.65 km NNW of North Sultan, Washington · 15431 days ago · 11 km deep · 24 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10178803. Read Fri, Oct 2, 2026, 7:32 PM UTC.