Alaska earthquakes

M4.1 earthquake 49 km NNE of Atka, Alaska

A magnitude 4.1 earthquake struck 49 km NNE of Atka, Alaska on Sat, Mar 19, 2016, 5:17 PM HADT (02:17 UTC), 180 km (112 mi) below the surface.

A larger quake followed: M4.2 93 km ENE of Atka, 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
4.1 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2016-03-20 02:17:40 UTC
Depth
180.1 km (111.9 mi), intermediate-depth
Epicenter
52.623° N, 174.002° W
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
4.1mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.175 · 9 stations
2.9ML, local (Richter)Alaska Earthquake CenterPreliminary

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 14.5 km horizontally, 10.4 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
120°
Stations used
27

Nearby

Within 100 km, magnitude 1.5 and up: 34 in the 60 days after this one and 30 in the 30 days before it.

After

  1. 2.552 km N of Atka, Alaska · 3851 days ago · 198 km deep · 15 km away
  2. 2.614 km WNW of Atka, Alaska · 3844 days ago · 174 km deep · 51 km away
  3. 4.293 km ENE of Atka, Alaska · 3843 days ago · 218 km deep · 65 km away
  4. 2.669 km ESE of Atka, Alaska · 3842 days ago · 35 km deep · 94 km away
  5. 2.768 km NNE of Atka, Alaska · 3841 days ago · 202 km deep · 19 km away
  6. 2.360 km SE of Atka, Alaska · 3839 days ago · 17 km deep · 93 km away
  7. 2.148 km SE of Atka, Alaska · 3836 days ago · 11 km deep · 80 km away
  8. 3.045 km NW of Atka, Alaska · 3834 days ago · 229 km deep · 43 km away
  9. 2.025 km SSW of Atka, Alaska · 3833 days ago · 77 km deep · 74 km away
  10. 1.640 km W of Atka, Alaska · 3830 days ago · 25 km deep · 68 km away
  11. 2.461 km N of Atka, Alaska · 3828 days ago · 157 km deep · 13 km away
  12. 2.050 km SW of Atka, Alaska · 3825 days ago · 51 km deep · 94 km away
  13. 2.621 km S of Atka, Alaska · 3822 days ago · 212 km deep · 70 km away
  14. 2.577 km WNW of Atka, Alaska · 3822 days ago · 243 km deep · 93 km away
  15. 3.238 km NNE of Atka, Alaska · 3821 days ago · 145 km deep · 16 km away
  16. 2.319 km SW of Atka, Alaska · 3821 days ago · 149 km deep · 67 km away
  17. 2.470 km NW of Atka, Alaska · 3820 days ago · 209 km deep · 55 km away
  18. 1.759 km E of Atka, Alaska · 3818 days ago · 13 km deep · 63 km away
  19. 1.855 km E of Atka, Alaska · 3818 days ago · 62 km deep · 62 km away
  20. 2.246 km NW of Atka, Alaska · 3818 days ago · 228 km deep · 52 km away
  21. 1.642 km ESE of Atka, Alaska · 3811 days ago · 37 km deep · 73 km away
  22. 1.836 km SW of Atka, Alaska · 3810 days ago · 67 km deep · 84 km away
  23. 2.131 km SE of Atka, Alaska · 3809 days ago · 0 km deep · 72 km away
  24. 2.447 km SSW of Atka, Alaska · 3808 days ago · 46 km deep · 97 km away
  25. 1.860 km E of Atka, Alaska · 3807 days ago · 3 km deep · 68 km away
  26. 1.959 km SE of Atka, Alaska · 3807 days ago · 3 km deep · 97 km away
  27. 2.631 km SSW of Atka, Alaska · 3804 days ago · 53 km deep · 80 km away
  28. 2.222 km WSW of Atka, Alaska · 3803 days ago · 139 km deep · 66 km away
  29. 1.726 km SSE of Atka, Alaska · 3799 days ago · 10 km deep · 71 km away
  30. 1.9Andreanof Islands, Aleutian Islands, Alaska · 3799 days ago · 36 km deep · 70 km away
  31. 1.644 km SSE of Atka, Alaska · 3798 days ago · 59 km deep · 86 km away
  32. 3.384 km ENE of Atka, Alaska · 3797 days ago · 66 km deep · 68 km away
  33. 2.846 km NW of Atka, Alaska · 3795 days ago · 214 km deep · 55 km away
  34. 3.911 km E of Atka, Alaska · 3793 days ago · 177 km deep · 49 km away

Before

  1. 4.961 km SE of Atka, Alaska · 3852 days ago · 10 km deep · 96 km away
  2. 2.358 km W of Atka, Alaska · 3853 days ago · 13 km deep · 90 km away
  3. 2.132 km SSW of Atka, Alaska · 3856 days ago · 61 km deep · 82 km away
  4. 3.848 km S of Atka, Alaska · 3857 days ago · 53 km deep · 95 km away
  5. 2.654 km E of Atka, Alaska · 3857 days ago · 107 km deep · 60 km away
  6. 3.135 km SSW of Atka, Alaska · 3858 days ago · 29 km deep · 84 km away
  7. 4.6Andreanof Islands, Aleutian Islands, Alaska · 3859 days ago · 51 km deep · 98 km away
  8. 2.513 km WNW of Atka, Alaska · 3859 days ago · 209 km deep · 50 km away
  9. 2.048 km ESE of Atka, Alaska · 3859 days ago · 8 km deep · 73 km away
  10. 4.130 km SSW of Atka, Alaska · 3860 days ago · 62 km deep · 79 km away
  11. 1.857 km E of Atka, Alaska · 3862 days ago · 13 km deep · 71 km away
  12. 2.059 km W of Atka, Alaska · 3867 days ago · 110 km deep · 87 km away
  13. 2.054 km ESE of Atka, Alaska · 3868 days ago · 13 km deep · 73 km away
  14. 2.0Andreanof Islands, Aleutian Islands, Alaska · 3871 days ago · 5 km deep · 72 km away
  15. 2.137 km SE of Atka, Alaska · 3871 days ago · 156 km deep · 73 km away
  16. 2.130 km NW of Atka, Alaska · 3871 days ago · 172 km deep · 45 km away
  17. 1.847 km ESE of Atka, Alaska · 3871 days ago · 9 km deep · 71 km away
  18. 1.752 km S of Atka, Alaska · 3871 days ago · 37 km deep · 100 km away
  19. 1.927 km SSE of Atka, Alaska · 3871 days ago · 61 km deep · 71 km away
  20. 2.062 km E of Atka, Alaska · 3872 days ago · 13 km deep · 76 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20005cw9 (also filed as ak0163ocad5l). Read Mon, Oct 5, 2026, 7:38 AM UTC.