Alaska earthquakes

M2.7 earthquake 138 km SE of Atka, Alaska

A magnitude 2.7 earthquake struck 138 km SE of Atka, Alaska on Sat, Oct 30, 2021, 12:57 AM HADT (09:57 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.3 73 km SSE 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
2.7 (ml), micro
Local time
UTC
2021-10-30 09:57:14 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.253° N, 172.893° 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 8.5 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
228°, poorly surrounded by stations
Stations used
16

Nearby

Within 100 km, magnitude 1.5 and up: 28 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 3.8Andreanof Islands, Aleutian Islands, Alaska · 1793 days ago · 61 km deep · 83 km away
  2. 4.097 km S of Atka, Alaska · 1790 days ago · 12 km deep · 86 km away
  3. 3.983 km SSE of Atka, Alaska · 1789 days ago · 35 km deep · 73 km away
  4. 2.4112 km SSE of Atka, Alaska · 1789 days ago · 37 km deep · 56 km away
  5. 2.8111 km SSE of Atka, Alaska · 1786 days ago · 35 km deep · 41 km away
  6. 3.4103 km SE of Atka, Alaska · 1785 days ago · 35 km deep · 37 km away
  7. 3.0102 km S of Atka, Alaska · 1783 days ago · 10 km deep · 92 km away
  8. 2.2122 km S of Atka, Alaska · 1781 days ago · 30 km deep · 98 km away
  9. 2.1164 km S of Atka, Alaska · 1779 days ago · 14 km deep · 96 km away
  10. 1.951 km ESE of Atka, Alaska · 1776 days ago · 63 km deep · 99 km away
  11. 1.952 km SE of Atka, Alaska · 1774 days ago · 55 km deep · 86 km away
  12. 2.8130 km S of Atka, Alaska · 1773 days ago · 10 km deep · 88 km away
  13. 2.097 km S of Atka, Alaska · 1766 days ago · 16 km deep · 72 km away
  14. 3.568 km S of Atka, Alaska · 1763 days ago · 91 km deep · 93 km away
  15. 2.7175 km SSE of Atka, Alaska · 1763 days ago · 10 km deep · 74 km away
  16. 2.879 km ESE of Atka, Alaska · 1759 days ago · 32 km deep · 70 km away
  17. 4.373 km SSE of Atka, Alaska · 1752 days ago · 43 km deep · 79 km away
  18. 2.971 km ESE of Atka, Alaska · 1750 days ago · 40 km deep · 79 km away
  19. 4.084 km SE of Atka, Alaska · 1749 days ago · 35 km deep · 56 km away
  20. 2.9132 km S of Atka, Alaska · 1748 days ago · 10 km deep · 92 km away
  21. 3.1169 km SE of Atka, Alaska · 1745 days ago · 10 km deep · 51 km away
  22. 2.250 km ESE of Atka, Alaska · 1744 days ago · 62 km deep · 95 km away
  23. 3.3122 km ESE of Atka, Alaska · 1741 days ago · 34 km deep · 69 km away
  24. 2.8155 km SE of Atka, Alaska · 1739 days ago · 28 km deep · 29 km away
  25. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1738 days ago · 17 km deep · 94 km away
  26. 3.175 km SE of Atka, Alaska · 1737 days ago · 33 km deep · 68 km away
  27. 2.191 km ESE of Atka, Alaska · 1734 days ago · 13 km deep · 84 km away
  28. 2.2119 km SSE of Atka, Alaska · 1733 days ago · 25 km deep · 57 km away

Before

  1. 4.069 km SSE of Atka, Alaska · 1795 days ago · 53 km deep · 80 km away
  2. 3.0108 km SE of Atka, Alaska · 1811 days ago · 31 km deep · 36 km away
  3. 3.050 km SSE of Atka, Alaska · 1814 days ago · 35 km deep · 92 km away
  4. 2.881 km SSE of Atka, Alaska · 1817 days ago · 35 km deep · 63 km away
  5. 1.993 km ESE of Atka, Alaska · 1820 days ago · 58 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000g9qk (also filed as ak021dx9jb62). Read Sun, Sep 27, 2026, 2:31 PM UTC.