Washington earthquakes

M2.5 earthquake 5 km E of Longbranch, Washington

A magnitude 2.5 earthquake struck 5 km E of Longbranch, Washington on Tue, Dec 30, 1975, 1:17 AM PST (09:17 UTC), 41 km (25 mi) below the surface.

A larger quake followed: M3.3 3 km SE of Bethel, Washington. This one was a foreshock.

Longbranch 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
2.5 (md), micro
Local time
UTC
1975-12-30 09:17:53 UTC
Depth
40.6 km (25.2 mi), shallow
Epicenter
47.208° N, 122.679° 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 0.9 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
112°
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: 21 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.92 km S of Ravensdale, Washington · 18527 days ago · 18 km deep · 54 km away
  2. 1.61 km WSW of Roosevelt, Washington · 18525 days ago · 14 km deep · 90 km away
  3. 1.92 km SE of Shoreline, Washington · 18525 days ago · 18 km deep · 65 km away
  4. 2.11 km NNE of Bellevue, Washington · 18524 days ago · 26 km deep · 59 km away
  5. 3.33 km SE of Bethel, Washington · 18523 days ago · 42 km deep · 30 km away
  6. 1.62 km SW of Poulsbo, Washington · 18522 days ago · 16 km deep · 56 km away
  7. 2.311 km SE of Blyn, Washington · 18522 days ago · 48 km deep · 83 km away
  8. 2.021 km S of Mossyrock, Washington · 18519 days ago · 23 km deep · 98 km away
  9. 1.811 km NE of Ashford, Washington · 18506 days ago · 8 km deep · 69 km away
  10. 2.91 km NNE of Silver Firs, Washington · 18502 days ago · 14 km deep · 84 km away
  11. 1.71 km SW of Union Hill-Novelty Hill, Washington · 18501 days ago · 8 km deep · 70 km away
  12. 1.65 km WSW of Home, Washington · 18500 days ago · 16 km deep · 12 km away
  13. 1.76 km SE of Port Ludlow, Washington · 18499 days ago · 14 km deep · 75 km away
  14. 1.52 km W of Fall City, Washington · 18488 days ago · 16 km deep · 70 km away
  15. 1.56 km W of DuPont, Washington · 18488 days ago · 51 km deep · 12 km away
  16. 2.14 km NNE of Covington, Washington · 18486 days ago · 18 km deep · 48 km away
  17. 1.612 km SE of Mossyrock, Washington · 18484 days ago · 14 km deep · 87 km away
  18. 1.612 km SSW of Morton, Washington · 18479 days ago · 15 km deep · 87 km away
  19. 1.814 km SE of Mossyrock, Washington · 18477 days ago · 9 km deep · 89 km away
  20. 2.53 km W of Monroe, Washington · 18476 days ago · 24 km deep · 87 km away
  21. 1.811 km ENE of Snoqualmie, Washington · 18474 days ago · 10 km deep · 85 km away

Before

  1. 2.41 km SE of Esperance, Washington · 18531 days ago · 22 km deep · 69 km away
  2. 2.112 km ESE of Ashford, Washington · 18534 days ago · 4 km deep · 82 km away
  3. 1.61 km ESE of Ravensdale, Washington · 18534 days ago · 18 km deep · 56 km away
  4. 1.914 km ESE of Ashford, Washington · 18534 days ago · 5 km deep · 84 km away
  5. 1.81 km W of Bryn Mawr-Skyway, Washington · 18536 days ago · 22 km deep · 45 km away
  6. 1.52 km WNW of North Bend, Washington · 18542 days ago · -1 km deep · 73 km away
  7. 1.84 km SSW of Fall City, Washington · 18542 days ago · 14 km deep · 67 km away
  8. 1.82 km NNW of Manchester, Washington · 18545 days ago · 16 km deep · 43 km away
  9. 1.72 km SSW of Union Hill-Novelty Hill, Washington · 18549 days ago · 2 km deep · 70 km away
  10. 1.72 km SSW of Kirkland, Washington · 18553 days ago · 11 km deep · 61 km away
  11. 2.05 km NNW of Bainbridge Island, Washington · 18554 days ago · 19 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10862443. Read Tue, Sep 22, 2026, 9:34 PM UTC.