Alaska earthquakes

M2.1 earthquake 182 km SSW of Atka, Alaska

A magnitude 2.1 earthquake struck 182 km SSW of Atka, Alaska on Mon, Dec 20, 2021, 7:33 AM HAST (17:33 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.9 200 km SE of Adak, 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
2.1 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2021-12-20 17:33:44 UTC
Depth
4.8 km (3.0 mi), shallow
Epicenter
50.601° N, 174.813° 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
12

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 2.4181 km S of Atka, Alaska · 1748 days ago · 20 km deep · 51 km away
  2. 2.7186 km SSE of Adak, Alaska · 1746 days ago · 10 km deep · 26 km away
  3. 2.6103 km SSW of Atka, Alaska · 1744 days ago · 10 km deep · 79 km away
  4. 2.8199 km SSW of Atka, Alaska · 1736 days ago · 10 km deep · 17 km away
  5. 2.8125 km SSW of Atka, Alaska · 1736 days ago · 6 km deep · 70 km away
  6. 2.1122 km SSW of Atka, Alaska · 1736 days ago · 13 km deep · 73 km away
  7. 2.4103 km S of Atka, Alaska · 1733 days ago · 18 km deep · 89 km away
  8. 2.2129 km S of Atka, Alaska · 1723 days ago · 5 km deep · 73 km away
  9. 2.3139 km S of Atka, Alaska · 1716 days ago · 10 km deep · 62 km away
  10. 2.5146 km SSE of Atka, Alaska · 1700 days ago · 16 km deep · 94 km away
  11. 2.1130 km SSE of Atka, Alaska · 1695 days ago · 13 km deep · 90 km away
  12. 2.9200 km SE of Adak, Alaska · 1694 days ago · 10 km deep · 18 km away

Before

  1. 2.3161 km SE of Adak, Alaska · 1751 days ago · 10 km deep · 29 km away
  2. 2.9132 km S of Atka, Alaska · 1754 days ago · 10 km deep · 65 km away
  3. 3.0111 km SSW of Atka, Alaska · 1766 days ago · 11 km deep · 74 km away
  4. 3.6107 km SSW of Atka, Alaska · 1766 days ago · 12 km deep · 78 km away
  5. 2.1113 km SSW of Atka, Alaska · 1766 days ago · 24 km deep · 72 km away
  6. 2.6119 km SSW of Atka, Alaska · 1766 days ago · 24 km deep · 65 km away
  7. 4.3107 km SSW of Atka, Alaska · 1766 days ago · 32 km deep · 78 km away
  8. 3.9112 km SSW of Atka, Alaska · 1766 days ago · 26 km deep · 72 km away
  9. 2.7175 km SSE of Atka, Alaska · 1769 days ago · 10 km deep · 96 km away
  10. 2.5161 km S of Atka, Alaska · 1778 days ago · 24 km deep · 54 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021g9qke6m. Read Sat, Oct 3, 2026, 5:30 PM UTC.