Washington earthquakes

M1.5 earthquake 1 km SSW of Oso, Washington

A magnitude 1.5 earthquake struck 1 km SSW of Oso, Washington on Fri, Aug 8, 2003, 2:03 AM PDT (09:03 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M2.9 37 km W of Granite Falls, Washington. This one was a foreshock.

Arlington Heights forecastMore in Washington

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2003-08-08 09:03:14 UTC
Depth
11.2 km (6.9 mi), shallow
Epicenter
48.258° N, 121.941° 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
±0.03
Depth from
From location
Station coverage gap
93°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 36 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 1.92 km N of Lake Marcel-Stillwater, Washington · 8453 days ago · 28 km deep · 61 km away
  2. 1.91 km SSE of Port Hadlock-Irondale, Washington · 8451 days ago · 16 km deep · 68 km away
  3. 1.51 km NNW of Lake Marcel-Stillwater, Washington · 8450 days ago · 27 km deep · 61 km away
  4. 1.95 km WSW of Swede Heaven, Washington · 8449 days ago · 3 km deep · 10 km away
  5. 1.910 km NNE of Snoqualmie, Washington · 8448 days ago · 12 km deep · 73 km away
  6. 2.18 km NE of Lake Marcel-Stillwater, Washington · 8447 days ago · 6 km deep · 57 km away
  7. 1.54 km SSE of Quilcene, Washington · 8447 days ago · 21 km deep · 86 km away
  8. 1.74 km SW of Port Hadlock-Irondale, Washington · 8447 days ago · 18 km deep · 71 km away
  9. 1.72 km SW of Port Hadlock-Irondale, Washington · 8446 days ago · 16 km deep · 70 km away
  10. 1.6Washington · 8444 days ago · 7 km deep · 51 km away
  11. 1.93 km NW of Deming, Washington · 8443 days ago · 16 km deep · 69 km away
  12. 1.53 km WNW of Deming, Washington · 8443 days ago · 13 km deep · 69 km away
  13. 1.911 km SSW of Darrington, Washington · 8443 days ago · 10 km deep · 25 km away
  14. 1.64 km WNW of Deming, Washington · 8442 days ago · 13 km deep · 70 km away
  15. 2.31 km WNW of Deming, Washington · 8442 days ago · 0 km deep · 67 km away
  16. 1.519 km NNE of Jamestown, Washington · 8439 days ago · 48 km deep · 81 km away
  17. 2.937 km W of Granite Falls, Washington · 8437 days ago · 5 km deep · 99 km away
  18. 1.81 km E of Maltby, Washington · 8436 days ago · 23 km deep · 51 km away
  19. 1.936 km N of Leavenworth, Washington · 8436 days ago · 5 km deep · 99 km away
  20. 2.38 km NNE of North Sultan, Washington · 8431 days ago · 11 km deep · 38 km away
  21. 1.952 km WNW of Granite Falls, Washington · 8427 days ago · -1 km deep · 82 km away
  22. 1.84 km N of Lake Marcel-Stillwater, Washington · 8419 days ago · 6 km deep · 59 km away
  23. 1.818 km ESE of Darrington, Washington · 8416 days ago · 9 km deep · 43 km away
  24. 1.618 km ESE of Darrington, Washington · 8416 days ago · 7 km deep · 42 km away
  25. 1.55 km NE of Anacortes, Washington · 8414 days ago · 12 km deep · 57 km away
  26. 2.06 km NE of Fall City, Washington · 8411 days ago · 17 km deep · 73 km away
  27. 2.214 km NE of Jamestown, Washington · 8410 days ago · 24 km deep · 74 km away
  28. 1.55 km SSE of Lynden, Washington · 8410 days ago · 16 km deep · 80 km away
  29. 1.55 km WSW of Hansville, Washington · 8410 days ago · 21 km deep · 65 km away
  30. 1.78 km SW of Sultan, Washington · 8407 days ago · 9 km deep · 52 km away
  31. 2.13 km NE of Anacortes, Washington · 8404 days ago · 16 km deep · 57 km away
  32. 2.010 km NNW of Marblemount, Washington · 8403 days ago · 0 km deep · 49 km away
  33. 1.91 km WSW of Maple Valley, Washington · 8400 days ago · 8 km deep · 97 km away
  34. 1.61 km WNW of Maple Valley, Washington · 8399 days ago · 6 km deep · 96 km away
  35. 1.68 km NNW of Freeland, Washington · 8399 days ago · 57 km deep · 51 km away
  36. 1.911 km SE of Skykomish, Washington · 8396 days ago · 5 km deep · 87 km away

Before

  1. 1.63 km NNW of Big Lake, Washington · 8459 days ago · 7 km deep · 30 km away
  2. 1.51 km WNW of Lake Marcel-Stillwater, Washington · 8459 days ago · 25 km deep · 62 km away
  3. 2.1Washington · 8461 days ago · 26 km deep · 47 km away
  4. 2.54 km SW of Clear Lake, Washington · 8461 days ago · 8 km deep · 31 km away
  5. 1.86 km SSE of Quilcene, Washington · 8464 days ago · 26 km deep · 86 km away
  6. 2.01 km E of Enetai, Washington · 8465 days ago · 24 km deep · 89 km away
  7. 1.65 km ENE of Carnation, Washington · 8467 days ago · 7 km deep · 66 km away
  8. 1.93 km SE of Klahanie, Washington · 8471 days ago · 17 km deep · 79 km away
  9. 2.23 km ESE of Freeland, Washington · 8476 days ago · 26 km deep · 50 km away
  10. 1.64 km NNE of Lake Roesiger, Washington · 8478 days ago · 13 km deep · 27 km away
  11. 1.65 km NNE of Brinnon, Washington · 8479 days ago · 22 km deep · 92 km away
  12. 1.51 km N of Carnation, Washington · 8479 days ago · 21 km deep · 66 km away
  13. 1.57 km NNE of Brinnon, Washington · 8480 days ago · 19 km deep · 89 km away
  14. 1.97 km NNE of Brinnon, Washington · 8480 days ago · 19 km deep · 89 km away
  15. 1.63 km ENE of Granite Falls, Washington · 8484 days ago · -1 km deep · 18 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10589878. Read Thu, Oct 1, 2026, 12:05 PM UTC.