Alaska earthquakes

M2.1 earthquake 178 km S of Atka, Alaska

A magnitude 2.1 earthquake struck 178 km S of Atka, Alaska on Sat, Oct 30, 2021, 7:32 PM HADT (04:32 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M4.3 107 km SSW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.1 (ml), micro
Local time
UTC
2021-10-31 04:32:21 UTC
Depth
22.8 km (14.2 mi), shallow
Epicenter
50.590° N, 174.328° 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
21

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 1.9156 km SSE of Adak, Alaska · 1793 days ago · 36 km deep · 79 km away
  2. 2.7108 km S of Atka, Alaska · 1793 days ago · 28 km deep · 72 km away
  3. 2.790 km SSW of Atka, Alaska · 1793 days ago · 35 km deep · 96 km away
  4. 4.097 km S of Atka, Alaska · 1791 days ago · 12 km deep · 83 km away
  5. 2.483 km S of Atka, Alaska · 1790 days ago · 25 km deep · 96 km away
  6. 2.4112 km SSE of Atka, Alaska · 1790 days ago · 37 km deep · 84 km away
  7. 2.8111 km SSE of Atka, Alaska · 1787 days ago · 35 km deep · 99 km away
  8. 3.0102 km S of Atka, Alaska · 1784 days ago · 10 km deep · 77 km away
  9. 2.2122 km S of Atka, Alaska · 1781 days ago · 30 km deep · 56 km away
  10. 2.1164 km S of Atka, Alaska · 1780 days ago · 14 km deep · 29 km away
  11. 2.8130 km S of Atka, Alaska · 1774 days ago · 10 km deep · 51 km away
  12. 2.5161 km S of Atka, Alaska · 1773 days ago · 24 km deep · 24 km away
  13. 2.097 km S of Atka, Alaska · 1767 days ago · 16 km deep · 87 km away
  14. 2.7175 km SSE of Atka, Alaska · 1763 days ago · 10 km deep · 63 km away
  15. 3.9112 km SSW of Atka, Alaska · 1761 days ago · 26 km deep · 79 km away
  16. 4.3107 km SSW of Atka, Alaska · 1761 days ago · 32 km deep · 86 km away
  17. 2.6119 km SSW of Atka, Alaska · 1761 days ago · 24 km deep · 72 km away
  18. 2.1113 km SSW of Atka, Alaska · 1761 days ago · 24 km deep · 80 km away
  19. 3.6107 km SSW of Atka, Alaska · 1761 days ago · 12 km deep · 86 km away
  20. 3.0111 km SSW of Atka, Alaska · 1761 days ago · 11 km deep · 82 km away
  21. 2.9132 km S of Atka, Alaska · 1748 days ago · 10 km deep · 48 km away
  22. 2.3161 km SE of Adak, Alaska · 1745 days ago · 10 km deep · 56 km away
  23. 2.1182 km SSW of Atka, Alaska · 1743 days ago · 5 km deep · 34 km away
  24. 2.4181 km S of Atka, Alaska · 1743 days ago · 20 km deep · 16 km away
  25. 2.7186 km SSE of Adak, Alaska · 1741 days ago · 10 km deep · 58 km away
  26. 2.6103 km SSW of Atka, Alaska · 1739 days ago · 10 km deep · 81 km away
  27. 2.2119 km SSE of Atka, Alaska · 1734 days ago · 25 km deep · 78 km away

Before

  1. 2.4177 km SSE of Adak, Alaska · 1811 days ago · 13 km deep · 67 km away
  2. 4.981 km S of Atka, Alaska · 1813 days ago · 35 km deep · 99 km away
  3. 2.995 km S of Atka, Alaska · 1814 days ago · 17 km deep · 83 km away
  4. 2.191 km S of Atka, Alaska · 1822 days ago · 4 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021dyty5x9. Read Mon, Sep 28, 2026, 10:59 AM UTC.