Washington earthquakes

M1.5 earthquake 14 km W of Brinnon, Washington

A magnitude 1.5 earthquake struck 14 km W of Brinnon, Washington on Wed, Sep 30, 1970, 1:35 AM PDT (08:35 UTC), 44 km (28 mi) below the surface.

A larger quake followed: M1.7 6 km SSE of Vashon, 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), micro
Local time
UTC
1970-09-30 08:35:54 UTC
Depth
44.4 km (27.6 mi), shallow
Epicenter
47.668° N, 123.094° 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, 0.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
191°, poorly surrounded by stations
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: 18 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.76 km SSE of Vashon, Washington · 20445 days ago · 20 km deep · 59 km away
  2. 2.13 km S of Shoreline, Washington · 20445 days ago · 14 km deep · 57 km away
  3. 2.04 km NE of Vashon, Washington · 20445 days ago · 22 km deep · 55 km away
  4. 1.75 km NW of Bryn Mawr-Skyway, Washington · 20436 days ago · 26 km deep · 63 km away
  5. 1.74 km ENE of White Center, Washington · 20434 days ago · 25 km deep · 61 km away
  6. 2.05 km SSW of Shoreline, Washington · 20430 days ago · 21 km deep · 54 km away
  7. 2.85 km SSE of Seabeck, Washington · 20428 days ago · 15 km deep · 23 km away
  8. 4.13 km NE of Dash Point, Washington · 20422 days ago · 12 km deep · 65 km away
  9. 2.00 km NE of Yarrow Point, Washington · 20420 days ago · -1 km deep · 66 km away
  10. 2.03 km ENE of Dash Point, Washington · 20415 days ago · 7 km deep · 65 km away
  11. 2.14 km ENE of Dash Point, Washington · 20415 days ago · 17 km deep · 65 km away
  12. 2.15 km SE of Vashon, Washington · 20409 days ago · 21 km deep · 59 km away
  13. 2.010 km SSW of Seabeck, Washington · 20404 days ago · 18 km deep · 20 km away
  14. 2.37 km SW of Seabeck, Washington · 20395 days ago · 19 km deep · 17 km away
  15. 1.92 km WSW of Sammamish, Washington · 20394 days ago · 19 km deep · 74 km away
  16. 3.010 km SSE of Shelton, Washington · 20390 days ago · 39 km deep · 60 km away
  17. 1.91 km ESE of Redmond, Washington · 20388 days ago · 20 km deep · 74 km away
  18. 2.10 km NNW of Enetai, Washington · 20387 days ago · 26 km deep · 38 km away

Before

  1. 2.84 km ENE of Kingston, Washington · 20449 days ago · 9 km deep · 51 km away
  2. 1.58 km NNE of Brinnon, Washington · 20450 days ago · 18 km deep · 21 km away
  3. 2.13 km NW of Belfair, Washington · 20453 days ago · 21 km deep · 28 km away
  4. 3.28 km NE of Fall City, Washington · 20472 days ago · 15 km deep · 97 km away
  5. 2.18 km N of Rochester, Washington · 20474 days ago · 47 km deep · 86 km away
  6. 1.97 km NNW of Freeland, Washington · 20475 days ago · 58 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10837033. Read Tue, Sep 22, 2026, 9:37 PM UTC.