Alaska earthquakes

M2.4 earthquake 177 km SSE of Adak, Alaska

A magnitude 2.4 earthquake struck 177 km SSE of Adak, Alaska on Tue, Oct 12, 2021, 6:50 PM HADT (03:50 UTC), 13 km (8 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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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
2021-10-13 03:50:29 UTC
Depth
13.3 km (8.3 mi), shallow
Epicenter
50.530° N, 175.266° 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 6 in the 30 days before it.

After

  1. 2.8188 km S of Adak, Alaska · 1793 days ago · 10 km deep · 72 km away
  2. 2.1178 km S of Atka, Alaska · 1789 days ago · 23 km deep · 67 km away
  3. 1.9156 km SSE of Adak, Alaska · 1789 days ago · 36 km deep · 21 km away
  4. 2.7108 km S of Atka, Alaska · 1789 days ago · 28 km deep · 98 km away
  5. 2.2122 km S of Atka, Alaska · 1777 days ago · 30 km deep · 94 km away
  6. 2.1164 km S of Atka, Alaska · 1776 days ago · 14 km deep · 93 km away
  7. 2.8130 km S of Atka, Alaska · 1770 days ago · 10 km deep · 99 km away
  8. 2.5161 km S of Atka, Alaska · 1768 days ago · 24 km deep · 87 km away
  9. 3.9112 km SSW of Atka, Alaska · 1757 days ago · 26 km deep · 87 km away
  10. 4.3107 km SSW of Atka, Alaska · 1757 days ago · 32 km deep · 92 km away
  11. 2.6119 km SSW of Atka, Alaska · 1757 days ago · 24 km deep · 81 km away
  12. 2.1113 km SSW of Atka, Alaska · 1757 days ago · 24 km deep · 86 km away
  13. 3.6107 km SSW of Atka, Alaska · 1757 days ago · 12 km deep · 92 km away
  14. 3.0111 km SSW of Atka, Alaska · 1757 days ago · 11 km deep · 88 km away
  15. 2.792 km SE of Adak, Alaska · 1748 days ago · 35 km deep · 99 km away

Before

  1. 3.7187 km S of Adak, Alaska · 1813 days ago · 10 km deep · 85 km away
  2. 3.1Andreanof Islands, Aleutian Islands, Alaska · 1825 days ago · 10 km deep · 81 km away
  3. 3.0135 km SSW of Atka, Alaska · 1833 days ago · 14 km deep · 64 km away
  4. 3.1164 km S of Adak, Alaska · 1834 days ago · 10 km deep · 71 km away
  5. 2.4163 km S of Adak, Alaska · 1835 days ago · 24 km deep · 72 km away
  6. 4.5161 km S of Adak, Alaska · 1835 days ago · 10 km deep · 72 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021d51sc4p. Read Thu, Sep 24, 2026, 10:40 AM UTC.