Washington earthquakes

M1.5 earthquake 4 km NW of Brinnon, Washington

A magnitude 1.5 earthquake struck 4 km NW of Brinnon, Washington on Wed, Aug 13, 1986, 10:43 PM PDT (05:43 UTC), 46 km (29 mi) below the surface.

A larger quake followed: M2.9 1 km SE of Allyn, 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
1986-08-14 05:43:14 UTC
Depth
46.3 km (28.7 mi), shallow
Epicenter
47.704° N, 122.945° 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, 0.8 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
44°
Stations used
31

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.11 km N of Bothell West, Washington · 14642 days ago · 20 km deep · 54 km away
  2. 2.5Olympic Peninsula, Washington · 14641 days ago · 40 km deep · 61 km away
  3. 1.73 km SSE of Klahanie, Washington · 14638 days ago · 19 km deep · 74 km away
  4. 2.822 km WSW of Skokomish, Washington · 14638 days ago · 40 km deep · 60 km away
  5. 2.91 km SE of Allyn, Washington · 14638 days ago · 27 km deep · 38 km away
  6. 1.60 km S of Oak Harbor, Washington · 14634 days ago · 19 km deep · 68 km away
  7. 2.4Washington-British Columbia border region · 14633 days ago · 48 km deep · 62 km away
  8. 2.3Puget Sound region, Washington · 14631 days ago · 13 km deep · 58 km away
  9. 2.02 km W of Fox Island, Washington · 14622 days ago · 26 km deep · 55 km away
  10. 1.81 km NNE of Riverton, Washington · 14608 days ago · 25 km deep · 54 km away
  11. 1.72 km E of Kirkland, Washington · 14607 days ago · 14 km deep · 58 km away
  12. 1.83 km NW of Wauna, Washington · 14598 days ago · 25 km deep · 40 km away

Before

  1. 1.63 km WSW of Lake Marcel-Stillwater, Washington · 14660 days ago · 18 km deep · 74 km away
  2. 1.83 km E of Maple Valley, Washington · 14674 days ago · 8 km deep · 79 km away
  3. 1.77 km NNW of Tenino, Washington · 14675 days ago · 52 km deep · 87 km away
  4. 1.517 km W of Coupeville, Washington · 14683 days ago · 42 km deep · 59 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10210933. Read Mon, Sep 28, 2026, 4:27 PM UTC.