Alaska earthquakes

M3.8 earthquake 170 km WNW of Adak, Alaska

A magnitude 3.8 earthquake struck 170 km WNW of Adak, Alaska on Mon, Jun 7, 2021, 7:25 AM HADT (16:25 UTC), 206 km (128 mi) below the surface.

A larger quake followed: M4.3 83 km W of Adak, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude
3.8 (mb), minor
Local time
UTC
2021-06-07 16:25:46 UTC
Depth
206.5 km (128.3 mi), intermediate-depth
Epicenter
52.429° N, 178.949° W
Region
Alaska
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 7.6 km horizontally, 8.3 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
79°
Stations used
54

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.5169 km W of Adak, Alaska · 1936 days ago · 9 km deep · 79 km away
  2. 1.7133 km WSW of Adak, Alaska · 1932 days ago · 9 km deep · 92 km away
  3. 1.8158 km WSW of Adak, Alaska · 1925 days ago · 12 km deep · 98 km away
  4. 1.8137 km WSW of Adak, Alaska · 1924 days ago · 16 km deep · 95 km away
  5. 1.6145 km W of Adak, Alaska · 1921 days ago · 7 km deep · 64 km away
  6. 1.5133 km WSW of Adak, Alaska · 1921 days ago · 14 km deep · 98 km away
  7. 1.888 km W of Adak, Alaska · 1916 days ago · 8 km deep · 95 km away
  8. 1.8200 km W of Adak, Alaska · 1916 days ago · 78 km deep · 85 km away
  9. 1.8131 km WSW of Adak, Alaska · 1913 days ago · 13 km deep · 93 km away
  10. 2.4104 km WNW of Adak, Alaska · 1910 days ago · 247 km deep · 65 km away
  11. 1.7131 km W of Adak, Alaska · 1910 days ago · 8 km deep · 86 km away
  12. 1.6130 km WSW of Adak, Alaska · 1909 days ago · 17 km deep · 98 km away
  13. 1.7130 km WSW of Adak, Alaska · 1906 days ago · 7 km deep · 94 km away
  14. 1.5103 km W of Adak, Alaska · 1904 days ago · 5 km deep · 82 km away
  15. 1.7129 km WSW of Adak, Alaska · 1901 days ago · 5 km deep · 95 km away
  16. 1.6175 km W of Adak, Alaska · 1901 days ago · 84 km deep · 82 km away
  17. 1.5132 km W of Adak, Alaska · 1901 days ago · 110 km deep · 70 km away
  18. 1.5213 km W of Adak, Alaska · 1899 days ago · 110 km deep · 89 km away
  19. 1.5151 km W of Adak, Alaska · 1897 days ago · 12 km deep · 86 km away
  20. 2.7147 km WNW of Adak, Alaska · 1896 days ago · 238 km deep · 22 km away
  21. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1896 days ago · 83 km deep · 85 km away
  22. 1.8129 km WSW of Adak, Alaska · 1895 days ago · 6 km deep · 97 km away
  23. 4.383 km W of Adak, Alaska · 1893 days ago · 8 km deep · 93 km away
  24. 2.9211 km W of Adak, Alaska · 1889 days ago · 158 km deep · 74 km away
  25. 2.1133 km W of Adak, Alaska · 1880 days ago · 139 km deep · 63 km away
  26. 1.982 km W of Adak, Alaska · 1879 days ago · 7 km deep · 99 km away

Before

  1. 2.5241 km WNW of Adak, Alaska · 1946 days ago · 92 km deep · 71 km away
  2. 2.7154 km W of Adak, Alaska · 1948 days ago · 90 km deep · 87 km away
  3. 1.5125 km WSW of Adak, Alaska · 1949 days ago · 15 km deep · 96 km away
  4. 3.1144 km W of Adak, Alaska · 1951 days ago · 81 km deep · 88 km away
  5. 2.9172 km W of Adak, Alaska · 1958 days ago · 10 km deep · 76 km away
  6. 1.5131 km WSW of Adak, Alaska · 1958 days ago · 5 km deep · 93 km away
  7. 1.8131 km WSW of Adak, Alaska · 1961 days ago · 12 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000eayi (also filed as ak02179kl8zd). Read Sat, Sep 26, 2026, 8:08 AM UTC.