Washington earthquakes

M1.7 earthquake 3 km NNW of Sumas, Washington

A magnitude 1.7 earthquake struck 3 km NNW of Sumas, Washington on Wed, Aug 18, 2004, 8:51 PM PDT (03:51 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.4 4 km NNE of Anacortes, Washington. This one was a foreshock.

Sumas 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
1.7 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2004-08-19 03:51:50 UTC
Depth
0.1 km (0.1 mi), shallow
Epicenter
49.027° N, 122.277° 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 20.1 km horizontally, 16.7 km in depth
Magnitude uncertainty
±0.05
Depth from
Operator assigned
Station coverage gap
280°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.65 km SSE of Swede Heaven, Washington · 8078 days ago · 9 km deep · 98 km away
  2. 1.91 km WNW of Swede Heaven, Washington · 8078 days ago · 7 km deep · 90 km away
  3. 1.54 km NE of Anacortes, Washington · 8075 days ago · 16 km deep · 58 km away
  4. 2.44 km NNE of Anacortes, Washington · 8075 days ago · 15 km deep · 58 km away
  5. 2.03 km NE of Anacortes, Washington · 8075 days ago · 17 km deep · 59 km away
  6. 1.5Washington · 8075 days ago · 7 km deep · 58 km away
  7. 1.7British Columbia, Canada · 8071 days ago · 1 km deep · 21 km away
  8. 1.97 km ENE of Coquitlam, Canada · 8070 days ago · 3 km deep · 43 km away
  9. 1.51 km NNW of Silvana, Washington · 8070 days ago · 8 km deep · 90 km away
  10. 1.65 km SE of Oso, Washington · 8060 days ago · 12 km deep · 93 km away
  11. 1.717 km W of Richmond, Canada · 8059 days ago · 0 km deep · 81 km away
  12. 1.92 km SE of Sudden Valley, Washington · 8058 days ago · 20 km deep · 36 km away
  13. 2.27 km SSE of Maple Falls, Washington · 8057 days ago · -1 km deep · 25 km away
  14. 1.96 km ENE of Acme, Washington · 8048 days ago · 14 km deep · 35 km away
  15. 1.52 km ESE of Sudden Valley, Washington · 8034 days ago · 19 km deep · 35 km away
  16. 1.64 km SE of Oso, Washington · 8030 days ago · 12 km deep · 92 km away

Before

  1. 1.86 km W of Orcas, Washington · 8079 days ago · 13 km deep · 73 km away
  2. 1.5British Columbia, Canada · 8082 days ago · 24 km deep · 67 km away
  3. 1.51 km NE of Lyman, Washington · 8086 days ago · 1 km deep · 57 km away
  4. 1.614 km SSW of Chilliwack, Canada · 8088 days ago · -1 km deep · 18 km away
  5. 1.51 km W of Silvana, Washington · 8089 days ago · 7 km deep · 92 km away
  6. 1.63 km ESE of Oso, Washington · 8098 days ago · 13 km deep · 91 km away
  7. 1.61 km N of Darrington, Washington · 8100 days ago · 11 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10613473. Read Fri, Oct 2, 2026, 4:51 AM UTC.