Washington earthquakes

M1.5 earthquake 8 km NNE of Brinnon, Washington

A magnitude 1.5 earthquake struck 8 km NNE of Brinnon, Washington on Sun, Sep 27, 1970, 2:52 AM PDT (09:52 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M4.1 3 km NE of Dash Point, Washington. This one was a foreshock.

Brinnon 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
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1970-09-27 09:52:58 UTC
Depth
17.5 km (10.9 mi), shallow
Epicenter
47.746° N, 122.842° 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 0.4 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
147°
Stations used
4

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 8 in the 30 days before it.

After

  1. 2.84 km ENE of Kingston, Washington · 20460 days ago · 9 km deep · 31 km away
  2. 1.514 km W of Brinnon, Washington · 20458 days ago · 44 km deep · 21 km away
  3. 1.911 km E of Lake Marcel-Stillwater, Washington · 20457 days ago · 3 km deep · 81 km away
  4. 1.76 km SSE of Vashon, Washington · 20456 days ago · 20 km deep · 50 km away
  5. 2.13 km S of Shoreline, Washington · 20456 days ago · 14 km deep · 37 km away
  6. 2.04 km NE of Vashon, Washington · 20456 days ago · 22 km deep · 43 km away
  7. 2.34 km SE of Carbonado, Washington · 20454 days ago · 9 km deep · 100 km away
  8. 1.75 km NW of Bryn Mawr-Skyway, Washington · 20447 days ago · 26 km deep · 48 km away
  9. 1.74 km ENE of White Center, Washington · 20445 days ago · 25 km deep · 47 km away
  10. 2.05 km SSW of Shoreline, Washington · 20441 days ago · 21 km deep · 35 km away
  11. 2.85 km SSE of Seabeck, Washington · 20440 days ago · 15 km deep · 18 km away
  12. 4.13 km NE of Dash Point, Washington · 20433 days ago · 12 km deep · 57 km away
  13. 2.00 km NE of Yarrow Point, Washington · 20431 days ago · -1 km deep · 49 km away
  14. 2.03 km ENE of Dash Point, Washington · 20427 days ago · 7 km deep · 57 km away
  15. 2.14 km ENE of Dash Point, Washington · 20426 days ago · 17 km deep · 57 km away
  16. 2.15 km SE of Vashon, Washington · 20420 days ago · 21 km deep · 50 km away
  17. 2.010 km SSW of Seabeck, Washington · 20416 days ago · 18 km deep · 22 km away
  18. 2.611 km S of Wilderness Rim, Washington · 20407 days ago · 15 km deep · 92 km away
  19. 2.37 km SW of Seabeck, Washington · 20406 days ago · 19 km deep · 18 km away
  20. 1.92 km WSW of Sammamish, Washington · 20406 days ago · 19 km deep · 56 km away
  21. 3.010 km SSE of Shelton, Washington · 20401 days ago · 39 km deep · 70 km away

Before

  1. 1.92 km SSE of Carbonado, Washington · 20463 days ago · 3 km deep · 98 km away
  2. 1.70 km ENE of Carbonado, Washington · 20463 days ago · 3 km deep · 95 km away
  3. 2.34 km SSE of Carbonado, Washington · 20463 days ago · 12 km deep · 100 km away
  4. 2.13 km NW of Belfair, Washington · 20464 days ago · 21 km deep · 30 km away
  5. 3.28 km NE of Fall City, Washington · 20484 days ago · 15 km deep · 79 km away
  6. 2.18 km N of Rochester, Washington · 20485 days ago · 47 km deep · 96 km away
  7. 1.97 km NNW of Freeland, Washington · 20486 days ago · 58 km deep · 42 km away
  8. 1.85 km SSW of Gorst, Washington · 20488 days ago · 22 km deep · 31 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10837003. Read Sun, Oct 4, 2026, 3:10 AM UTC.