Washington earthquakes

M1.6 earthquake 11 km NE of Snoqualmie, Washington

A magnitude 1.6 earthquake struck 11 km NE of Snoqualmie, Washington on Sat, Apr 2, 1977, 3:27 AM PST (11:27 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M2.2 4 km ENE of Bonney Lake, WA. This one was a foreshock.

Snoqualmie 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
1.6 (md), micro
Local time
UTC
1977-04-02 11:27:09 UTC
Depth
13.0 km (8.1 mi), shallow
Epicenter
47.603° N, 121.712° 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 1.1 km horizontally, 1.8 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
188°, 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: 22 in the 60 days after this one and 20 in the 30 days before it.

After

  1. 2.24 km ENE of Bonney Lake, WA · 18070 days ago · 24 km deep · 55 km away
  2. 2.42 km NNE of Bonney Lake, Washington · 18068 days ago · 18 km deep · 56 km away
  3. 2.2Washington · 18066 days ago · 19 km deep · 34 km away
  4. 2.1Washington · 18065 days ago · 17 km deep · 25 km away
  5. 1.94 km NE of Bonney Lake, Washington · 18061 days ago · 24 km deep · 55 km away
  6. 2.04 km N of White Center, Washington · 18060 days ago · 2 km deep · 48 km away
  7. 1.82 km NNE of Quilcene, Washington · 18058 days ago · 16 km deep · 90 km away
  8. 2.12 km E of Dash Point, Washington · 18053 days ago · 12 km deep · 60 km away
  9. 1.74 km WSW of White Center, Washington · 18053 days ago · 21 km deep · 53 km away
  10. 1.92 km ESE of Dash Point, Washington · 18053 days ago · 12 km deep · 61 km away
  11. 1.87 km SE of Enumclaw, Washington · 18044 days ago · 19 km deep · 52 km away
  12. 1.60 km W of Port Ludlow, Washington · 18044 days ago · -1 km deep · 81 km away
  13. 1.910 km SSW of Seabeck, Washington · 18040 days ago · 16 km deep · 87 km away
  14. 2.00 km NW of North Puyallup, Washington · 18040 days ago · 15 km deep · 61 km away
  15. 2.33 km ENE of Enetai, Washington · 18035 days ago · 11 km deep · 63 km away
  16. 3.05 km S of Quilcene, Washington · 18034 days ago · 45 km deep · 88 km away
  17. 2.218 km NNE of Ashford, Washington · 18025 days ago · 8 km deep · 78 km away
  18. 2.24 km E of Cathcart, Washington · 18025 days ago · 3 km deep · 37 km away
  19. 2.34 km NNW of Swede Heaven, Washington · 18020 days ago · 1 km deep · 80 km away
  20. 2.33 km WSW of Wilderness Rim, Washington · 18017 days ago · 18 km deep · 20 km away
  21. 1.712 km W of Entiat, Washington · 18015 days ago · 0 km deep · 100 km away
  22. 2.27 km NW of Kingston, Washington · 18013 days ago · 44 km deep · 69 km away

Before

  1. 2.01 km SSW of Suquamish, Washington · 18071 days ago · 5 km deep · 65 km away
  2. 2.02 km SSW of Bonney Lake, Washington · 18077 days ago · 25 km deep · 62 km away
  3. 2.82 km N of Bonney Lake, Washington · 18077 days ago · 13 km deep · 57 km away
  4. 2.33 km NNE of Bonney Lake, Washington · 18077 days ago · 8 km deep · 56 km away
  5. 2.22 km S of Lake Roesiger, Washington · 18077 days ago · 8 km deep · 43 km away
  6. 1.9Puget Sound region, Washington · 18080 days ago · 25 km deep · 40 km away
  7. 1.78 km NNE of Lake Marcel-Stillwater, Washington · 18081 days ago · 12 km deep · 20 km away
  8. 2.12 km SSE of Dash Point, Washington · 18081 days ago · 14 km deep · 62 km away
  9. 2.316 km SE of Carbonado, Washington · 18084 days ago · 16 km deep · 71 km away
  10. 1.65 km WNW of White Center, Washington · 18086 days ago · 21 km deep · 54 km away
  11. 2.12 km ESE of Issaquah, Washington · 18086 days ago · 31 km deep · 24 km away
  12. 2.1Puget Sound region, Washington · 18088 days ago · 64 km deep · 44 km away
  13. 2.24 km N of Woods Creek, Washington · 18088 days ago · 9 km deep · 38 km away
  14. 1.76 km SSE of Wilderness Rim, Washington · 18089 days ago · 26 km deep · 23 km away
  15. 2.26 km E of Hobart, Washington · 18089 days ago · 13 km deep · 25 km away
  16. 2.1Washington · 18089 days ago · 9 km deep · 10 km away
  17. 1.71 km SSW of Federal Way, Washington · 18090 days ago · 20 km deep · 56 km away
  18. 2.44 km ESE of Hobart, Washington · 18091 days ago · 12 km deep · 26 km away
  19. 2.6Puget Sound region, Washington · 18096 days ago · 21 km deep · 77 km away
  20. 2.315 km WSW of Greenwater, Washington · 18098 days ago · 8 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10843448. Read Tue, Sep 22, 2026, 9:19 AM UTC.