Washington earthquakes

M1.6 earthquake 5 km NNW of Concrete, Washington

A magnitude 1.6 earthquake struck 5 km NNW of Concrete, Washington on Sat, Dec 15, 1984, 11:14 AM PST (19:14 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.0 43 km WNW of Winthrop, Washington. This one was a foreshock.

Concrete 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
1.6 (md), micro
Local time
UTC
1984-12-15 19:14:56 UTC
Depth
2.6 km (1.6 mi), shallow
Epicenter
48.586° N, 121.779° 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 3.7 km horizontally, 2.9 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
201°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 21 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 2.043 km WNW of Winthrop, Washington · 15253 days ago · -1 km deep · 82 km away
  2. 1.66 km NNW of Concrete, Washington · 15252 days ago · 4 km deep · 1 km away
  3. 1.75 km N of Hamilton, Washington · 15252 days ago · 13 km deep · 15 km away
  4. 2.20 km N of Woodway, Washington · 15251 days ago · 22 km deep · 98 km away
  5. 2.97 km NW of Concrete, Washington · 15248 days ago · 2 km deep · 2 km away
  6. 1.74 km NNW of Bryant, Washington · 15246 days ago · 12 km deep · 46 km away
  7. 2.17 km NW of Concrete, Washington · 15240 days ago · 1 km deep · 3 km away
  8. 1.97 km NW of Concrete, Washington · 15238 days ago · 1 km deep · 2 km away
  9. 2.58 km NNE of Lake Marcel-Stillwater, Washington · 15230 days ago · 0 km deep · 92 km away
  10. 2.48 km NNE of Lake Marcel-Stillwater, Washington · 15229 days ago · 1 km deep · 92 km away
  11. 1.76 km WNW of Orcas, Washington · 15221 days ago · 19 km deep · 92 km away
  12. 2.53 km E of Edison, Washington · 15220 days ago · 14 km deep · 45 km away
  13. 1.65 km E of Lake Bosworth, Washington · 15216 days ago · -1 km deep · 60 km away
  14. 2.34 km E of Edison, Washington · 15214 days ago · 14 km deep · 45 km away
  15. 1.75 km ENE of Big Lake, Washington · 15214 days ago · 8 km deep · 34 km away
  16. 1.93 km E of Granite Falls, Washington · 15214 days ago · -1 km deep · 56 km away
  17. 1.55 km S of Lake Roesiger, Washington · 15208 days ago · -1 km deep · 74 km away
  18. 1.78 km ENE of Ferndale, Washington · 15207 days ago · 12 km deep · 60 km away
  19. 1.60 km WNW of Everett, Washington · 15207 days ago · 18 km deep · 74 km away
  20. 1.76 km WSW of Lake Cavanaugh, Washington · 15206 days ago · 12 km deep · 39 km away
  21. 1.96 km WSW of Lake Cavanaugh, Washington · 15206 days ago · 12 km deep · 39 km away

Before

  1. 1.96 km NW of Concrete, Washington · 15260 days ago · 1 km deep · 2 km away
  2. 3.27 km NW of Concrete, Washington · 15268 days ago · -1 km deep · 2 km away
  3. 3.17 km NW of Concrete, Washington · 15269 days ago · -1 km deep · 2 km away
  4. 1.59 km NW of Orcas, Washington · 15280 days ago · 20 km deep · 92 km away
  5. 2.31 km ENE of Hamilton, Washington · 15281 days ago · -1 km deep · 16 km away
  6. 2.01 km N of Woods Creek, Washington · 15281 days ago · 16 km deep · 77 km away
  7. 1.73 km NE of Woods Creek, Washington · 15285 days ago · -1 km deep · 77 km away
  8. 2.74 km NNW of Bryant, Washington · 15285 days ago · 14 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10182528. Read Tue, Sep 22, 2026, 12:16 PM UTC.