Alaska earthquakes

M2.4 earthquake 181 km S of Atka, Alaska

A magnitude 2.4 earthquake struck 181 km S of Atka, Alaska on Mon, Dec 20, 2021, 8:26 AM HAST (18:26 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M3.8 161 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
2.4 (ml), micro
Local time
UTC
2021-12-20 18:26:57 UTC
Depth
20.1 km (12.5 mi), shallow
Epicenter
50.563° N, 174.099° 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
20

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 2.7186 km SSE of Adak, Alaska · 1739 days ago · 10 km deep · 73 km away
  2. 2.6103 km SSW of Atka, Alaska · 1737 days ago · 10 km deep · 88 km away
  3. 2.2119 km SSE of Atka, Alaska · 1733 days ago · 25 km deep · 73 km away
  4. 2.8199 km SSW of Atka, Alaska · 1730 days ago · 10 km deep · 52 km away
  5. 2.8125 km SSW of Atka, Alaska · 1729 days ago · 6 km deep · 99 km away
  6. 2.4103 km S of Atka, Alaska · 1726 days ago · 18 km deep · 79 km away
  7. 2.2129 km S of Atka, Alaska · 1716 days ago · 5 km deep · 53 km away
  8. 2.3139 km S of Atka, Alaska · 1709 days ago · 10 km deep · 42 km away
  9. 3.2194 km SSE of Atka, Alaska · 1700 days ago · 10 km deep · 57 km away
  10. 2.3176 km SSE of Atka, Alaska · 1698 days ago · 10 km deep · 74 km away
  11. 2.5146 km SSE of Atka, Alaska · 1693 days ago · 16 km deep · 55 km away
  12. 2.1130 km SSE of Atka, Alaska · 1688 days ago · 13 km deep · 60 km away
  13. 2.1127 km SSE of Atka, Alaska · 1688 days ago · 10 km deep · 73 km away
  14. 2.9200 km SE of Adak, Alaska · 1687 days ago · 10 km deep · 58 km away
  15. 3.8161 km SSE of Atka, Alaska · 1687 days ago · 10 km deep · 60 km away

Before

  1. 2.1182 km SSW of Atka, Alaska · 1741 days ago · 5 km deep · 51 km away
  2. 2.3161 km SE of Adak, Alaska · 1744 days ago · 10 km deep · 72 km away
  3. 2.9132 km S of Atka, Alaska · 1747 days ago · 10 km deep · 49 km away
  4. 3.0111 km SSW of Atka, Alaska · 1759 days ago · 11 km deep · 92 km away
  5. 3.6107 km SSW of Atka, Alaska · 1759 days ago · 12 km deep · 96 km away
  6. 2.1113 km SSW of Atka, Alaska · 1759 days ago · 24 km deep · 91 km away
  7. 2.6119 km SSW of Atka, Alaska · 1759 days ago · 24 km deep · 83 km away
  8. 4.3107 km SSW of Atka, Alaska · 1759 days ago · 32 km deep · 95 km away
  9. 3.9112 km SSW of Atka, Alaska · 1759 days ago · 26 km deep · 89 km away
  10. 2.7175 km SSE of Atka, Alaska · 1762 days ago · 10 km deep · 48 km away
  11. 2.097 km S of Atka, Alaska · 1765 days ago · 16 km deep · 87 km away
  12. 2.5161 km S of Atka, Alaska · 1771 days ago · 24 km deep · 20 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021g9r4csf. Read Sat, Sep 26, 2026, 10:49 PM UTC.