Alaska earthquakes

M3.0 earthquake 79 km NE of Atka, Alaska

A magnitude 3.0 earthquake struck 79 km NE of Atka, Alaska on Wed, Oct 27, 2021, 4:53 PM HADT (01:53 UTC), 236 km (146 mi) below the surface.

A larger quake followed: M4.0 58 km NNW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.0 (ml), minor
Local time
UTC
2021-10-28 01:53:42 UTC
Depth
235.5 km (146.3 mi), intermediate-depth
Epicenter
52.762° N, 173.486° 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.

Stations used
31

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.142 km ESE of Atka, Alaska · 1776 days ago · 15 km deep · 77 km away
  2. 4.058 km NNW of Atka, Alaska · 1775 days ago · 211 km deep · 63 km away
  3. 1.951 km ESE of Atka, Alaska · 1773 days ago · 63 km deep · 77 km away
  4. 1.817 km SSW of Atka, Alaska · 1771 days ago · 76 km deep · 96 km away
  5. 1.824 km S of Atka, Alaska · 1770 days ago · 61 km deep · 97 km away
  6. 1.915 km SSW of Atka, Alaska · 1767 days ago · 85 km deep · 94 km away
  7. 3.515 km NW of Atka, Alaska · 1758 days ago · 178 km deep · 77 km away
  8. 2.956 km N of Atka, Alaska · 1755 days ago · 179 km deep · 47 km away
  9. 2.07 km E of Atka, Alaska · 1749 days ago · 6 km deep · 75 km away
  10. 3.283 km NNE of Atka, Alaska · 1747 days ago · 17 km deep · 13 km away
  11. 2.971 km ESE of Atka, Alaska · 1747 days ago · 40 km deep · 94 km away
  12. 3.123 km S of Atka, Alaska · 1746 days ago · 178 km deep · 97 km away
  13. 2.250 km ESE of Atka, Alaska · 1741 days ago · 62 km deep · 83 km away
  14. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1735 days ago · 17 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021dttochs. Read Thu, Sep 24, 2026, 12:21 PM UTC.