Washington earthquakes

M1.5 earthquake 9 km NW of Orcas, Washington

A magnitude 1.5 earthquake struck 9 km NW of Orcas, Washington on Wed, Nov 21, 1984, 3:15 PM PST (23:15 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M3.1 7 km NW of Concrete, 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
1.5 (md), micro
Local time
UTC
1984-11-21 23:15:56 UTC
Depth
20.1 km (12.5 mi), shallow
Epicenter
48.669° N, 123.018° 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 0.1 km horizontally, 0.1 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
69°
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: 13 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 3.17 km NW of Concrete, Washington · 15269 days ago · -1 km deep · 89 km away
  2. 3.27 km NW of Concrete, Washington · 15268 days ago · -1 km deep · 89 km away
  3. 1.96 km NW of Concrete, Washington · 15260 days ago · 1 km deep · 89 km away
  4. 1.65 km NNW of Concrete, Washington · 15256 days ago · 3 km deep · 92 km away
  5. 1.66 km NNW of Concrete, Washington · 15252 days ago · 4 km deep · 91 km away
  6. 1.75 km N of Hamilton, Washington · 15252 days ago · 13 km deep · 77 km away
  7. 2.97 km NW of Concrete, Washington · 15248 days ago · 2 km deep · 89 km away
  8. 1.74 km NNW of Bryant, Washington · 15247 days ago · 12 km deep · 76 km away
  9. 2.17 km NW of Concrete, Washington · 15240 days ago · 1 km deep · 89 km away
  10. 1.97 km NW of Concrete, Washington · 15238 days ago · 1 km deep · 89 km away
  11. 3.38 km N of Quilcene, Washington · 15229 days ago · 21 km deep · 86 km away
  12. 1.76 km WNW of Orcas, Washington · 15221 days ago · 19 km deep · 6 km away
  13. 2.53 km E of Edison, Washington · 15220 days ago · 14 km deep · 48 km away

Before

  1. 1.84 km S of Bell Hill, Washington · 15281 days ago · -1 km deep · 73 km away
  2. 2.31 km ENE of Hamilton, Washington · 15281 days ago · -1 km deep · 78 km away
  3. 2.74 km NNW of Bryant, Washington · 15285 days ago · 14 km deep · 75 km away
  4. 1.93 km N of Bryant, Washington · 15294 days ago · 15 km deep · 77 km away
  5. 1.710 km NNE of Hamilton, Washington · 15295 days ago · 12 km deep · 78 km away
  6. 1.54 km NE of Mukilteo, Washington · 15297 days ago · 2 km deep · 95 km away
  7. 2.11 km SE of Big Lake, Washington · 15306 days ago · 13 km deep · 66 km away
  8. 1.710 km NE of Hamilton, Washington · 15306 days ago · 14 km deep · 83 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10183938. Read Tue, Sep 22, 2026, 3:38 PM UTC.