Washington earthquakes

M2.4 earthquake 20 km NNE of Index, Washington

A magnitude 2.4 earthquake struck 20 km NNE of Index, Washington on Tue, Jun 7, 1977, 1:09 AM PDT (08:09 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M4.0 4 km N of Bangor Trident Base, 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
2.4 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1977-06-07 08:09:52 UTC
Depth
4.5 km (2.8 mi), shallow
Epicenter
47.995° N, 121.474° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
129°
Stations used
10

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 9 in the 30 days before it.

After

  1. 2.12 km S of Lakeland North, Washington · 18008 days ago · 8 km deep · 97 km away
  2. 1.80 km N of Normandy Park, Washington · 18006 days ago · 18 km deep · 89 km away
  3. 4.04 km N of Bangor Trident Base, Washington · 18003 days ago · 19 km deep · 97 km away
  4. 2.04 km WNW of Northwest Stanwood, Washington · 18002 days ago · 21 km deep · 76 km away
  5. 1.52 km W of Mercer Island, Washington · 17998 days ago · 0 km deep · 75 km away
  6. 2.10 km SSE of Bryant, Washington · 17989 days ago · 0 km deep · 57 km away
  7. 3.63 km ENE of Edison, Washington · 17980 days ago · 12 km deep · 94 km away
  8. 1.56 km NNE of Duvall, Washington · 17979 days ago · 24 km deep · 43 km away
  9. 2.710 km NE of Snoqualmie, Washington · 17977 days ago · 7 km deep · 49 km away
  10. 1.96 km ESE of Edison, Washington · 17975 days ago · 5 km deep · 90 km away
  11. 3.34 km N of Duvall, Washington · 17975 days ago · 23 km deep · 44 km away
  12. 1.53 km ESE of Fall City, Washington · 17970 days ago · 19 km deep · 56 km away
  13. 2.52 km WNW of Clearview, Washington · 17970 days ago · 55 km deep · 53 km away
  14. 1.80 km WNW of Normandy Park, Washington · 17965 days ago · 16 km deep · 90 km away
  15. 2.02 km NNE of Duvall, Washington · 17958 days ago · 19 km deep · 45 km away
  16. 2.13 km SSW of Redmond, Washington · 17955 days ago · 0 km deep · 64 km away
  17. 2.70 km W of Alderwood Manor, Washington · 17954 days ago · 14 km deep · 64 km away
  18. 1.51 km NNE of Lynnwood, Washington · 17954 days ago · 2 km deep · 65 km away

Before

  1. 1.94 km WNW of Wilderness Rim, Washington · 18017 days ago · 23 km deep · 65 km away
  2. 1.91 km SW of White Center, Washington · 18018 days ago · 24 km deep · 87 km away
  3. 2.27 km NW of Kingston, Washington · 18022 days ago · 44 km deep · 83 km away
  4. 1.712 km W of Entiat, Washington · 18024 days ago · 0 km deep · 89 km away
  5. 2.33 km WSW of Wilderness Rim, Washington · 18026 days ago · 18 km deep · 67 km away
  6. 2.34 km NNW of Swede Heaven, Washington · 18029 days ago · 1 km deep · 42 km away
  7. 2.24 km E of Cathcart, Washington · 18034 days ago · 3 km deep · 45 km away
  8. 1.510 km WSW of Entiat, Washington · 18034 days ago · 0 km deep · 92 km away
  9. 2.0Washington · 18041 days ago · 0 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10843808. Read Thu, Oct 1, 2026, 9:39 AM UTC.