Washington earthquakes

M1.5 earthquake 21 km NNE of Concrete, Washington

A magnitude 1.5 earthquake struck 21 km NNE of Concrete, Washington on Thu, Aug 4, 2005, 3:29 AM PDT (10:29 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.8 40 km SW of Princeton, Canada. This one was a foreshock.

Concrete 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
2005-08-04 10:29:27 UTC
Depth
0.1 km (0.1 mi), shallow
Epicenter
48.724° N, 121.660° 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 6.1 km horizontally, 45.9 km in depth
Magnitude uncertainty
±0.03
Depth from
Operator assigned
Station coverage gap
193°, poorly surrounded by stations
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: 12 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.65 km SE of Oso, Washington · 7728 days ago · 13 km deep · 57 km away
  2. 1.59 km NNW of Orcas, Washington · 7728 days ago · 14 km deep · 99 km away
  3. 1.70 km SSW of Oso, Washington · 7726 days ago · 13 km deep · 55 km away
  4. 2.217 km ESE of Glacier, Washington · 7724 days ago · 34 km deep · 11 km away
  5. 2.13 km S of Geneva, Washington · 7716 days ago · 15 km deep · 55 km away
  6. 2.17 km ENE of Lake Roesiger, WA · 7712 days ago · 12 km deep · 80 km away
  7. 1.65 km ENE of Anacortes, Washington · 7708 days ago · 16 km deep · 68 km away
  8. 2.56 km WSW of Darrington, Washington · 7707 days ago · 8 km deep · 55 km away
  9. 2.02 km ENE of Granite Falls, Washington · 7705 days ago · -1 km deep · 73 km away
  10. 1.74 km S of La Conner, Washington · 7698 days ago · 18 km deep · 74 km away
  11. 1.82 km ENE of Granite Falls, Washington · 7696 days ago · -1 km deep · 73 km away
  12. 2.840 km SW of Princeton, Canada · 7695 days ago · -1 km deep · 77 km away

Before

  1. 1.623 km SW of Winthrop, Washington · 7730 days ago · 1 km deep · 98 km away
  2. 2.015 km SE of Glacier, Washington · 7732 days ago · 26 km deep · 12 km away
  3. 1.64 km NE of Lake Roesiger, Washington · 7733 days ago · 15 km deep · 81 km away
  4. 2.32 km SSE of Big Lake, Washington · 7737 days ago · 14 km deep · 56 km away
  5. 1.652 km SE of Hope, Canada · 7738 days ago · -2 km deep · 66 km away
  6. 2.325 km SW of Princeton, Canada · 7738 days ago · -2 km deep · 92 km away
  7. 1.84 km WSW of Mount Vernon, Washington · 7741 days ago · 18 km deep · 65 km away
  8. 1.911 km E of Marblemount, Washington · 7749 days ago · 0 km deep · 35 km away
  9. 1.720 km SSE of Glacier, Washington · 7750 days ago · 20 km deep · 10 km away
  10. 1.77 km SSE of Acme, Washington · 7755 days ago · 3 km deep · 39 km away
  11. 2.47 km ESE of Oso, Washington · 7755 days ago · 10 km deep · 55 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10673223. Read Sat, Oct 3, 2026, 6:48 AM UTC.