Washington earthquakes

M1.8 earthquake 4 km NW of Marrowstone, Washington

A magnitude 1.8 earthquake struck 4 km NW of Marrowstone, Washington on Sun, Sep 8, 1991, 5:44 AM PDT (12:44 UTC), 53 km (33 mi) below the surface.

A larger quake followed: M3.0 6 km NW of Orcas, Washington. This one was a foreshock.

Marrowstone 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
1.8 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-09-08 12:44:46 UTC
Depth
53.5 km (33.2 mi), shallow
Epicenter
48.081° N, 122.726° 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 0.6 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
35°
Stations used
30

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 2.06 km ESE of Alger, Washington · 12807 days ago · 8 km deep · 67 km away
  2. 1.60 km ENE of Erlands Point-Kitsap Lake, Washington · 12807 days ago · 2 km deep · 54 km away
  3. 2.20 km SE of Erlands Point-Kitsap Lake, Washington · 12805 days ago · 2 km deep · 54 km away
  4. 2.114 km SW of Baring, Washington · 12803 days ago · 10 km deep · 93 km away
  5. 1.70 km S of Erlands Point-Kitsap Lake, Washington · 12802 days ago · 5 km deep · 54 km away
  6. 2.41 km ESE of Erlands Point-Kitsap Lake, Washington · 12802 days ago · 2 km deep · 54 km away
  7. 1.90 km SE of Erlands Point-Kitsap Lake, Washington · 12802 days ago · 3 km deep · 54 km away
  8. 2.36 km NW of Orcas, Washington · 12801 days ago · 18 km deep · 66 km away
  9. 3.06 km NW of Orcas, Washington · 12801 days ago · 19 km deep · 66 km away
  10. 1.74 km NE of White Center, Washington · 12800 days ago · 27 km deep · 68 km away
  11. 1.62 km WNW of Sammamish, Washington · 12796 days ago · -1 km deep · 67 km away
  12. 2.04 km NE of Bryant, Washington · 12795 days ago · 11 km deep · 50 km away
  13. 1.68 km ENE of Lake Marcel-Stillwater, Washington · 12795 days ago · 3 km deep · 79 km away
  14. 2.04 km SSE of Grapeview, Washington · 12794 days ago · 18 km deep · 87 km away
  15. 1.65 km NW of Federal Way, Washington · 12790 days ago · 14 km deep · 85 km away
  16. 2.05 km NNE of Lake Marcel-Stillwater, Washington · 12789 days ago · 17 km deep · 73 km away
  17. 1.715 km W of Brinnon, Washington · 12788 days ago · 43 km deep · 54 km away
  18. 2.413 km SSW of Blyn, Washington · 12779 days ago · 42 km deep · 33 km away
  19. 1.63 km E of Deming, Washington · 12774 days ago · 1 km deep · 92 km away
  20. 1.85 km NNE of Kingston, Washington · 12773 days ago · 22 km deep · 33 km away
  21. 1.59 km NNW of Ault Field, Washington · 12769 days ago · 50 km deep · 38 km away
  22. 2.27 km ENE of Snoqualmie, Washington · 12768 days ago · 13 km deep · 94 km away
  23. 1.52 km NW of Maple Valley, Washington · 12767 days ago · 17 km deep · 89 km away
  24. 1.937 km S of Port Angeles East, Washington · 12756 days ago · 11 km deep · 62 km away
  25. 1.92 km NE of Deming, Washington · 12752 days ago · -1 km deep · 93 km away
  26. 1.82 km N of Big Lake, Washington · 12751 days ago · -1 km deep · 52 km away
  27. 1.52 km NNE of Eastmont, Washington · 12750 days ago · 16 km deep · 46 km away

Before

  1. 2.01 km SE of Erlands Point-Kitsap Lake, Washington · 12809 days ago · 5 km deep · 55 km away
  2. 1.63 km SE of Lake Marcel-Stillwater, WA · 12809 days ago · 7 km deep · 77 km away
  3. 1.53 km SSW of Des Moines, Washington · 12813 days ago · 18 km deep · 84 km away
  4. 2.01 km NW of Lake Roesiger, Washington · 12817 days ago · 11 km deep · 59 km away
  5. 1.73 km SW of Tacoma, Washington · 12819 days ago · 49 km deep · 97 km away
  6. 2.25 km ESE of Alger, Washington · 12821 days ago · 2 km deep · 66 km away
  7. 1.98 km SSE of Coupeville, Washington · 12822 days ago · 20 km deep · 10 km away
  8. 1.81 km N of Lake Roesiger, Washington · 12822 days ago · 11 km deep · 60 km away
  9. 1.91 km NW of Lake Roesiger, Washington · 12823 days ago · 11 km deep · 59 km away
  10. 1.85 km E of Belfair, Washington · 12824 days ago · 45 km deep · 70 km away
  11. 2.21 km NNW of Lake Roesiger, Washington · 12825 days ago · 11 km deep · 60 km away
  12. 2.04 km N of Friday Harbor, Washington · 12826 days ago · 54 km deep · 60 km away
  13. 2.33 km W of Wauna, Washington · 12827 days ago · 20 km deep · 78 km away
  14. 1.52 km SSE of Orcas, Washington · 12827 days ago · 56 km deep · 57 km away
  15. 2.517 km S of Glacier, Washington · 12830 days ago · -1 km deep · 93 km away
  16. 1.55 km NE of Marrowstone, Washington · 12830 days ago · 26 km deep · 7 km away
  17. 1.56 km ESE of Alger, Washington · 12834 days ago · -1 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10276348. Read Fri, Oct 2, 2026, 1:55 PM UTC.