Washington earthquakes

M2.1 earthquake 22 km ENE of Glacier, Washington

A magnitude 2.1 earthquake struck 22 km ENE of Glacier, Washington on Fri, Apr 17, 1981, 9:27 AM PST (17:27 UTC), -1 km (0 mi) below the surface.

A larger quake followed: M2.4 3 km ENE of Sedro-Woolley, 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
2.1 (md), micro
Local time
UTC
1981-04-17 17:27:03 UTC
Depth
-0.8 km (-0.5 mi), shallow
Epicenter
48.955° N, 121.654° 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 0.5 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.11
Depth from
Operator assigned
Station coverage gap
218°, poorly surrounded by stations
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 2.43 km ENE of Sedro-Woolley, Washington · 16594 days ago · 3 km deep · 63 km away
  2. 1.56 km SSE of Alger, Washington · 16592 days ago · 10 km deep · 65 km away
  3. 1.56 km NNE of Oso, Washington · 16586 days ago · 0 km deep · 73 km away
  4. 1.76 km NNE of Oso, Washington · 16580 days ago · 0 km deep · 72 km away
  5. 2.05 km NNE of Oso, Washington · 16580 days ago · 5 km deep · 73 km away
  6. 1.65 km NNE of Oso, Washington · 16580 days ago · 1 km deep · 73 km away
  7. 2.56 km NNE of Oso, Washington · 16580 days ago · 1 km deep · 73 km away
  8. 1.55 km NNE of Oso, Washington · 16579 days ago · 0 km deep · 73 km away
  9. 1.5Washington · 16578 days ago · 1 km deep · 73 km away
  10. 1.68 km SSW of Concrete, Washington · 16559 days ago · 3 km deep · 55 km away
  11. 1.512 km NNE of Hamilton, Washington · 16553 days ago · -1 km deep · 42 km away
  12. 1.814 km NNE of Hamilton, Washington · 16553 days ago · -1 km deep · 39 km away
  13. 1.815 km NNE of Hamilton, Washington · 16538 days ago · -1 km deep · 39 km away
  14. 1.915 km NNE of Hamilton, Washington · 16538 days ago · -1 km deep · 39 km away
  15. 1.516 km SSE of Darrington, Washington · 16535 days ago · 9 km deep · 92 km away

Before

  1. 1.84 km SSW of Hamilton, Washington · 16597 days ago · 3 km deep · 59 km away
  2. 1.68 km WNW of Alger, Washington · 16602 days ago · -1 km deep · 66 km away
  3. 1.9Washington · 16608 days ago · 2 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10105108. Read Tue, Sep 22, 2026, 10:49 AM UTC.