Alaska earthquakes

M4.0 earthquake 289 km W of Adak, Alaska

A magnitude 4.0 earthquake struck 289 km W of Adak, Alaska on Sat, Feb 6, 2016, 10:44 AM GMT+12 (22:44 UTC), 139 km (86 mi) below the surface.

A larger quake followed: M5.3 259 km WSW of Adak, Alaska. 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
4.0 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2016-02-05 22:44:22 UTC
Depth
138.6 km (86.1 mi), intermediate-depth
Epicenter
51.997° N, 179.158° E
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
4.0mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.11 · 22 stations
4.0mb, body-waveAlaska Earthquake CenterPreliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 14.2 km horizontally, 18.9 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
191°, poorly surrounded by stations
Stations used
32

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 3.0Rat Islands, Aleutian Islands, Alaska · 3892 days ago · 101 km deep · 55 km away
  2. 5.3259 km WSW of Adak, Alaska · 3891 days ago · 45 km deep · 75 km away · tsunami flag
  3. 4.3263 km WSW of Adak, Alaska · 3890 days ago · 35 km deep · 95 km away
  4. 2.8243 km WSW of Adak, Alaska · 3887 days ago · 35 km deep · 91 km away
  5. 2.5284 km WNW of Adak, Alaska · 3885 days ago · 20 km deep · 100 km away
  6. 2.8251 km W of Adak, Alaska · 3883 days ago · 45 km deep · 42 km away
  7. 2.9274 km WSW of Adak, Alaska · 3882 days ago · 53 km deep · 67 km away
  8. 3.8Rat Islands, Aleutian Islands, Alaska · 3880 days ago · 75 km deep · 39 km away
  9. 3.2226 km WSW of Adak, Alaska · 3880 days ago · 77 km deep · 90 km away
  10. 2.6209 km W of Adak, Alaska · 3876 days ago · 88 km deep · 92 km away
  11. 2.8Rat Islands, Aleutian Islands, Alaska · 3876 days ago · 108 km deep · 47 km away
  12. 2.5225 km W of Adak, Alaska · 3875 days ago · 96 km deep · 64 km away
  13. 3.9Rat Islands, Aleutian Islands, Alaska · 3869 days ago · 102 km deep · 44 km away
  14. 3.1210 km W of Adak, Alaska · 3868 days ago · 182 km deep · 88 km away
  15. 4.2Rat Islands, Aleutian Islands, Alaska · 3866 days ago · 107 km deep · 90 km away
  16. 3.0226 km W of Adak, Alaska · 3863 days ago · 230 km deep · 73 km away
  17. 4.2Rat Islands, Aleutian Islands, Alaska · 3859 days ago · 53 km deep · 78 km away
  18. 3.0288 km WSW of Adak, Alaska · 3859 days ago · 35 km deep · 99 km away
  19. 3.2Rat Islands, Aleutian Islands, Alaska · 3857 days ago · 135 km deep · 33 km away
  20. 3.0Rat Islands, Aleutian Islands, Alaska · 3856 days ago · 100 km deep · 55 km away
  21. 3.1235 km W of Adak, Alaska · 3855 days ago · 81 km deep · 70 km away
  22. 4.0Rat Islands, Aleutian Islands, Alaska · 3854 days ago · 119 km deep · 58 km away
  23. 4.0232 km W of Adak, Alaska · 3853 days ago · 67 km deep · 78 km away
  24. 4.6Rat Islands, Aleutian Islands, Alaska · 3851 days ago · 112 km deep · 52 km away
  25. 4.1Rat Islands, Aleutian Islands, Alaska · 3849 days ago · 100 km deep · 52 km away
  26. 2.7251 km W of Adak, Alaska · 3843 days ago · 57 km deep · 43 km away
  27. 3.1Rat Islands, Aleutian Islands, Alaska · 3838 days ago · 128 km deep · 80 km away

Before

  1. 3.2Rat Islands, Aleutian Islands, Alaska · 3894 days ago · 108 km deep · 69 km away
  2. 2.5215 km WSW of Adak, Alaska · 3896 days ago · 81 km deep · 96 km away
  3. 3.2211 km WSW of Adak, Alaska · 3896 days ago · 39 km deep · 98 km away
  4. 4.9Rat Islands, Aleutian Islands, Alaska · 3901 days ago · 105 km deep · 53 km away · tsunami flag
  5. 2.4197 km W of Adak, Alaska · 3905 days ago · 84 km deep · 93 km away
  6. 2.8Rat Islands, Aleutian Islands, Alaska · 3911 days ago · 20 km deep · 33 km away
  7. 4.5Rat Islands, Aleutian Islands, Alaska · 3914 days ago · 146 km deep · 64 km away
  8. 2.5214 km W of Adak, Alaska · 3916 days ago · 86 km deep · 78 km away
  9. 2.7199 km W of Adak, Alaska · 3919 days ago · 158 km deep · 92 km away
  10. 2.9Rat Islands, Aleutian Islands, Alaska · 3920 days ago · 72 km deep · 31 km away
  11. 2.9Rat Islands, Aleutian Islands, Alaska · 3920 days ago · 68 km deep · 86 km away
  12. 3.1Rat Islands, Aleutian Islands, Alaska · 3920 days ago · 93 km deep · 52 km away
  13. 3.8Rat Islands, Aleutian Islands, Alaska · 3921 days ago · 103 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us200050cj (also filed as ak0161nwphxh). Read Mon, Oct 5, 2026, 3:34 AM UTC.