Washington earthquakes

M1.9 earthquake Olympic Peninsula, Washington

A magnitude 1.9 earthquake struck in the Olympic Peninsula, Washington on Sat, Oct 29, 1977, 1:40 AM PDT (08:40 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M2.7 Olympic Peninsula, Washington. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.9 (md), micro
Local time
UTC
1977-10-29 08:40:37 UTC
Depth
1.1 km (0.7 mi), shallow
Epicenter
47.379° N, 123.521° 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 3.4 km horizontally, 2.7 km in depth
Depth from
From location
Station coverage gap
185°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.7Olympic Peninsula, Washington · 17860 days ago · 0 km deep · 1 km away
  2. 1.62 km W of Burley, Washington · 17852 days ago · 21 km deep · 64 km away
  3. 1.61 km N of Esperance, Washington · 17852 days ago · 6 km deep · 99 km away
  4. 2.11 km WNW of Indianola, Washington · 17819 days ago · 18 km deep · 84 km away
  5. 1.63 km W of Suquamish, Washington · 17814 days ago · 24 km deep · 80 km away
  6. 1.54 km ESE of Indianola, Washington · 17810 days ago · 15 km deep · 89 km away
  7. 1.63 km W of Chico, Washington · 17809 days ago · 19 km deep · 63 km away
  8. 1.60 km N of Southworth, Washington · 17805 days ago · 18 km deep · 78 km away
  9. 2.26 km SSE of Port Angeles East, Washington · 17802 days ago · 44 km deep · 76 km away

Before

  1. 2.427 km W of Skokomish, Washington · 17860 days ago · 1 km deep · 2 km away
  2. 2.125 km W of Skokomish, Washington · 17861 days ago · -1 km deep · 5 km away
  3. 2.10 km E of Riverton, Washington · 17870 days ago · 22 km deep · 94 km away
  4. 1.62 km NW of White Center, Washington · 17874 days ago · 19 km deep · 88 km away
  5. 3.215 km S of Sooke, Canada · 17874 days ago · 46 km deep · 97 km away
  6. 1.81 km E of Enetai, Washington · 17880 days ago · 20 km deep · 74 km away
  7. 1.63 km NW of Suquamish, Washington · 17881 days ago · 21 km deep · 82 km away
  8. 1.64 km WNW of Mercer Island, Washington · 17885 days ago · 38 km deep · 97 km away
  9. 1.56 km SSW of Hansville, Washington · 17888 days ago · 15 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10845068. Read Tue, Sep 22, 2026, 11:13 AM UTC.