Alaska earthquakes

M3.1 earthquake 192 km SE of Adak, Alaska

A magnitude 3.1 earthquake struck 192 km SE of Adak, Alaska on Tue, Feb 27, 2024, 1:21 AM HAST (11:21 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.9 191 km S 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
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2024-02-27 11:21:31 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.514° N, 174.940° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.097 · 14 stations
2.9ML, local (Richter)Alaska Earthquake CenterPreliminary

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 3.6 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
231°, poorly surrounded by stations
Stations used
18

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.9177 km S of Atka, Alaska · 941 days ago · 10 km deep · 53 km away
  2. 3.9191 km S of Adak, Alaska · 935 days ago · 10 km deep · 95 km away
  3. 3.0205 km S of Atka, Alaska · 929 days ago · 10 km deep · 30 km away
  4. 3.0164 km S of Atka, Alaska · 926 days ago · 10 km deep · 71 km away
  5. 2.4174 km SE of Adak, Alaska · 926 days ago · 10 km deep · 19 km away
  6. 2.6184 km S of Adak, Alaska · 925 days ago · 10 km deep · 96 km away
  7. 2.5172 km SSE of Adak, Alaska · 925 days ago · 10 km deep · 76 km away
  8. 3.3129 km SSW of Atka, Alaska · 923 days ago · 10 km deep · 72 km away
  9. 2.4114 km SSW of Atka, Alaska · 922 days ago · 6 km deep · 93 km away
  10. 2.8208 km S of Atka, Alaska · 920 days ago · 19 km deep · 64 km away
  11. 2.1103 km S of Atka, Alaska · 918 days ago · 0 km deep · 93 km away
  12. 3.0106 km S of Atka, Alaska · 910 days ago · 35 km deep · 91 km away
  13. 2.2120 km SSW of Atka, Alaska · 906 days ago · 2 km deep · 74 km away
  14. 2.1113 km SSW of Atka, Alaska · 902 days ago · 31 km deep · 93 km away
  15. 3.396 km SE of Adak, Alaska · 898 days ago · 31 km deep · 95 km away
  16. 2.5168 km S of Adak, Alaska · 895 days ago · 10 km deep · 87 km away
  17. 1.696 km SE of Adak, Alaska · 894 days ago · 16 km deep · 96 km away

Before

  1. 3.6115 km SSW of Atka, Alaska · 957 days ago · 10 km deep · 80 km away
  2. 3.1110 km SSW of Atka, Alaska · 957 days ago · 10 km deep · 85 km away
  3. 2.7172 km S of Atka, Alaska · 958 days ago · 10 km deep · 84 km away
  4. 2.8202 km SSW of Atka, Alaska · 962 days ago · 6 km deep · 12 km away
  5. 2.4142 km S of Atka, Alaska · 963 days ago · 6 km deep · 65 km away
  6. 2.9112 km SSW of Atka, Alaska · 965 days ago · 10 km deep · 84 km away
  7. 2.8195 km SE of Adak, Alaska · 972 days ago · 10 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000mj5p (also filed as ak0242o3ugwg). Read Thu, Oct 1, 2026, 7:13 PM UTC.