Washington earthquakes

M1.7 earthquake Washington

A magnitude 1.7 earthquake struck in Washington on Sun, Feb 29, 1976, 5:30 AM PST (13:30 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M1.8 13 km NNE of Snoqualmie, 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
1.7 (md), micro
Local time
UTC
1976-02-29 13:30:50 UTC
Depth
13.3 km (8.3 mi), shallow
Epicenter
48.344° N, 121.922° 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 0.8 km horizontally, 0.2 km in depth
Magnitude uncertainty
±0.12
Depth from
Operator assigned
Station coverage gap
201°, 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: 17 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.813 km NNE of Snoqualmie, Washington · 18467 days ago · 11 km deep · 80 km away
  2. 2.05 km W of Orcas, Washington · 18459 days ago · 10 km deep · 86 km away
  3. 1.94 km NE of Alger, Washington · 18455 days ago · 13 km deep · 44 km away
  4. 1.50 km NE of Lynnwood, Washington · 18453 days ago · 18 km deep · 64 km away
  5. 1.516 km NE of Snoqualmie, Washington · 18451 days ago · 9 km deep · 80 km away
  6. 1.61 km ENE of Everett, Washington · 18438 days ago · 21 km deep · 44 km away
  7. 1.50 km SSW of Lynnwood, Washington · 18436 days ago · 4 km deep · 66 km away
  8. 1.62 km NE of Carnation, Washington · 18428 days ago · 9 km deep · 76 km away
  9. 1.67 km WSW of Camano, Washington · 18424 days ago · 28 km deep · 57 km away
  10. 1.76 km NW of Orcas, Washington · 18421 days ago · 15 km deep · 86 km away
  11. 2.72 km SW of Mountlake Terrace, Washington · 18410 days ago · 27 km deep · 70 km away
  12. 1.96 km NW of Sedro-Woolley, Washington · 18410 days ago · -1 km deep · 35 km away
  13. 2.01 km SE of Esperance, Washington · 18410 days ago · 19 km deep · 70 km away
  14. 1.61 km SSW of Mountlake Terrace, Washington · 18410 days ago · 23 km deep · 70 km away
  15. 1.68 km NNE of Snoqualmie, Washington · 18410 days ago · 4 km deep · 84 km away
  16. 1.51 km E of Lake Roesiger, Washington · 18410 days ago · 0 km deep · 40 km away
  17. 1.61 km NE of Edmonds, Washington · 18409 days ago · 5 km deep · 67 km away

Before

  1. 1.83 km SW of Lake Forest Park, Washington · 18470 days ago · 22 km deep · 74 km away
  2. 1.811 km ENE of Snoqualmie, Washington · 18474 days ago · 10 km deep · 86 km away
  3. 2.53 km W of Monroe, Washington · 18476 days ago · 24 km deep · 55 km away
  4. 1.84 km NNE of Aldergrove East, Canada · 18479 days ago · 3 km deep · 92 km away
  5. 1.52 km W of Fall City, Washington · 18489 days ago · 16 km deep · 86 km away
  6. 3.52 km E of Conway, Washington · 18498 days ago · 15 km deep · 29 km away
  7. 1.85 km SW of Lake Cavanaugh, Washington · 18498 days ago · 13 km deep · 13 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10840778. Read Wed, Sep 23, 2026, 9:22 AM UTC.