Washington earthquakes

M1.5 earthquake 7 km SSE of Blyn, Washington

A magnitude 1.5 earthquake struck 7 km SSE of Blyn, Washington on Sat, Mar 12, 1977, 8:22 AM PST (16:22 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M1.7 1 km SSW of Federal Way, 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
1.5 (md), micro
Local time
UTC
1977-03-12 16:22:55 UTC
Depth
19.6 km (12.2 mi), shallow
Epicenter
47.968° N, 122.953° 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 0.1 km horizontally, 0.1 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
176°
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: 20 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.71 km SSW of Federal Way, Washington · 18090 days ago · 20 km deep · 88 km away
  2. 2.24 km N of Woods Creek, Washington · 18089 days ago · 9 km deep · 78 km away
  3. 2.1Puget Sound region, Washington · 18088 days ago · 64 km deep · 96 km away
  4. 2.12 km ESE of Issaquah, Washington · 18087 days ago · 31 km deep · 87 km away
  5. 1.65 km WNW of White Center, Washington · 18086 days ago · 21 km deep · 62 km away
  6. 2.12 km SSE of Dash Point, Washington · 18082 days ago · 14 km deep · 84 km away
  7. 1.78 km NNE of Lake Marcel-Stillwater, Washington · 18081 days ago · 12 km deep · 85 km away
  8. 2.22 km S of Lake Roesiger, Washington · 18077 days ago · 8 km deep · 76 km away
  9. 2.01 km SSW of Suquamish, Washington · 18072 days ago · 5 km deep · 40 km away
  10. 2.18 km S of Acme, Washington · 18065 days ago · 2 km deep · 93 km away
  11. 2.04 km N of White Center, Washington · 18060 days ago · 2 km deep · 65 km away
  12. 1.82 km NNE of Quilcene, Washington · 18058 days ago · 16 km deep · 16 km away
  13. 2.12 km E of Dash Point, Washington · 18054 days ago · 12 km deep · 83 km away
  14. 1.74 km WSW of White Center, Washington · 18053 days ago · 21 km deep · 66 km away
  15. 1.92 km ESE of Dash Point, Washington · 18053 days ago · 12 km deep · 84 km away
  16. 1.60 km W of Port Ludlow, Washington · 18044 days ago · -1 km deep · 20 km away
  17. 1.910 km SSW of Seabeck, Washington · 18041 days ago · 16 km deep · 47 km away
  18. 2.00 km NW of North Puyallup, Washington · 18040 days ago · 15 km deep · 98 km away
  19. 2.33 km ENE of Enetai, Washington · 18036 days ago · 11 km deep · 50 km away
  20. 3.05 km S of Quilcene, Washington · 18034 days ago · 45 km deep · 23 km away

Before

  1. 2.44 km ESE of Hobart, Washington · 18091 days ago · 12 km deep · 99 km away
  2. 2.6Puget Sound region, Washington · 18096 days ago · 21 km deep · 78 km away
  3. 1.78 km NNE of Snoqualmie, Washington · 18110 days ago · 3 km deep · 98 km away
  4. 2.31 km NW of Lake Forest Park, Washington · 18111 days ago · 22 km deep · 54 km away
  5. 1.91 km WNW of SeaTac, Washington · 18113 days ago · 23 km deep · 75 km away
  6. 2.03 km SE of Shoreline, Washington · 18120 days ago · 15 km deep · 54 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10843303. Read Tue, Sep 22, 2026, 8:36 PM UTC.