Alaska earthquakes

M2.8 earthquake 155 km SE of Atka, Alaska

A magnitude 2.8 earthquake struck 155 km SE of Atka, Alaska on Wed, Dec 22, 2021, 11:49 PM HAST (09:49 UTC), 28 km (17 mi) below the surface.

A larger quake followed: M3.1 75 km SE 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
2.8 (ml), micro
Local time
UTC
2021-12-23 09:49:45 UTC
Depth
28.0 km (17.4 mi), shallow
Epicenter
51.292° N, 172.488° 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 5.4 km horizontally, 12.6 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
232°, poorly surrounded by stations
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 3.175 km SE of Atka, Alaska · 1734 days ago · 33 km deep · 81 km away
  2. 2.191 km ESE of Atka, Alaska · 1731 days ago · 13 km deep · 85 km away
  3. 2.2119 km SSE of Atka, Alaska · 1730 days ago · 25 km deep · 86 km away
  4. 4.1142 km ESE of Atka, Alaska · 1719 days ago · 35 km deep · 76 km away
  5. 3.5112 km SE of Atka, Alaska · 1714 days ago · 41 km deep · 44 km away
  6. 3.160 km SE of Atka, Alaska · 1709 days ago · 6 km deep · 95 km away
  7. 3.066 km SSE of Atka, Alaska · 1709 days ago · 35 km deep · 94 km away
  8. 3.2209 km ESE of Atka, Alaska · 1709 days ago · 35 km deep · 97 km away
  9. 3.184 km ESE of Atka, Alaska · 1703 days ago · 35 km deep · 87 km away
  10. 2.962 km ESE of Atka, Alaska · 1703 days ago · 35 km deep · 94 km away
  11. 3.7Andreanof Islands, Aleutian Islands, Alaska · 1701 days ago · 42 km deep · 59 km away
  12. 3.2165 km SE of Atka, Alaska · 1696 days ago · 10 km deep · 29 km away
  13. 2.3176 km SSE of Atka, Alaska · 1696 days ago · 10 km deep · 72 km away
  14. 3.2102 km ESE of Atka, Alaska · 1693 days ago · 35 km deep · 72 km away
  15. 3.2213 km ESE of Atka, Alaska · 1692 days ago · 35 km deep · 97 km away
  16. 2.5146 km SSE of Atka, Alaska · 1691 days ago · 16 km deep · 86 km away
  17. 2.157 km SE of Atka, Alaska · 1685 days ago · 24 km deep · 98 km away
  18. 2.1130 km SSE of Atka, Alaska · 1685 days ago · 13 km deep · 92 km away
  19. 2.1127 km SSE of Atka, Alaska · 1685 days ago · 10 km deep · 77 km away
  20. 3.8161 km SSE of Atka, Alaska · 1684 days ago · 10 km deep · 80 km away

Before

  1. 3.3122 km ESE of Atka, Alaska · 1738 days ago · 34 km deep · 60 km away
  2. 3.1169 km SE of Atka, Alaska · 1742 days ago · 10 km deep · 23 km away
  3. 4.084 km SE of Atka, Alaska · 1745 days ago · 35 km deep · 71 km away
  4. 2.971 km ESE of Atka, Alaska · 1747 days ago · 40 km deep · 89 km away
  5. 4.0189 km ESE of Atka, Alaska · 1748 days ago · 39 km deep · 85 km away
  6. 2.879 km ESE of Atka, Alaska · 1756 days ago · 32 km deep · 79 km away
  7. 2.7175 km SSE of Atka, Alaska · 1759 days ago · 10 km deep · 95 km away
  8. 2.097 km S of Atka, Alaska · 1763 days ago · 16 km deep · 100 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000gexs (also filed as ak021gekiitk). Read Thu, Sep 24, 2026, 7:03 AM UTC.