Alaska earthquakes

M3.4 earthquake 105 km SSE of Adak, Alaska

A magnitude 3.4 earthquake struck 105 km SSE of Adak, Alaska on Tue, Aug 26, 2025, 3:02 AM HADT (12:02 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M4.9 71 km SSW 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
3.4 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-08-26 12:02:15 UTC
Depth
12.4 km (7.7 mi), shallow
Epicenter
50.974° N, 176.174° 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
3.4ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.085 · 18 stations
3.0ML, 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 5.4 km horizontally, 9.5 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
235°, poorly surrounded by stations
Stations used
25

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 110 in the 30 days before it.

After

  1. 1.891 km SSE of Adak, Alaska · 403 days ago · 25 km deep · 15 km away
  2. 1.884 km SSE of Adak, Alaska · 403 days ago · 18 km deep · 22 km away
  3. 1.967 km SSW of Adak, Alaska · 403 days ago · 33 km deep · 69 km away
  4. 3.253 km SE of Adak, Alaska · 402 days ago · 35 km deep · 64 km away
  5. 2.698 km SSE of Adak, Alaska · 402 days ago · 10 km deep · 9 km away
  6. 2.96 km SSE of Adak, Alaska · 402 days ago · 75 km deep · 98 km away
  7. 2.290 km SSE of Adak, Alaska · 401 days ago · 13 km deep · 15 km away
  8. 2.799 km SSE of Adak, Alaska · 401 days ago · 33 km deep · 6 km away
  9. 2.094 km SSE of Adak, Alaska · 401 days ago · 26 km deep · 12 km away
  10. 1.642 km SSE of Adak, Alaska · 401 days ago · 36 km deep · 64 km away
  11. 1.756 km SE of Adak, Alaska · 401 days ago · 25 km deep · 54 km away
  12. 2.7105 km SW of Atka, Alaska · 398 days ago · 35 km deep · 91 km away
  13. 2.147 km SE of Adak, Alaska · 398 days ago · 37 km deep · 64 km away
  14. 2.031 km SSW of Adak, Alaska · 397 days ago · 63 km deep · 82 km away
  15. 1.953 km SSE of Adak, Alaska · 396 days ago · 56 km deep · 54 km away
  16. 1.953 km SE of Adak, Alaska · 396 days ago · 56 km deep · 63 km away
  17. 2.773 km SSE of Adak, Alaska · 395 days ago · 25 km deep · 38 km away
  18. 2.582 km ESE of Adak, Alaska · 395 days ago · 50 km deep · 84 km away
  19. 3.8110 km SSW of Adak, Alaska · 393 days ago · 8 km deep · 70 km away
  20. 4.095 km SSE of Adak, Alaska · 373 days ago · 10 km deep · 20 km away · felt by 1
  21. 1.850 km SW of Adak, Alaska · 371 days ago · 15 km deep · 95 km away
  22. 1.866 km SSE of Adak, Alaska · 371 days ago · 21 km deep · 39 km away
  23. 2.066 km SE of Adak, Alaska · 371 days ago · 26 km deep · 49 km away
  24. 3.8103 km S of Adak, Alaska · 369 days ago · 10 km deep · 51 km away
  25. 2.757 km SSW of Adak, Alaska · 363 days ago · 34 km deep · 66 km away
  26. 4.4100 km SW of Atka, Alaska · 359 days ago · 35 km deep · 92 km away
  27. 2.672 km SE of Adak, Alaska · 350 days ago · 35 km deep · 44 km away
  28. 2.454 km SW of Adak, Alaska · 350 days ago · 36 km deep · 86 km away
  29. 1.989 km ESE of Adak, Alaska · 350 days ago · 19 km deep · 79 km away
  30. 4.971 km SSW of Adak, Alaska · 348 days ago · 37 km deep · 72 km away · felt by 2
  31. 4.947 km SE of Adak, Alaska · 343 days ago · 57 km deep · 67 km away · felt by 1

Before

  1. 3.388 km SSE of Adak, Alaska · 403 days ago · 24 km deep · 18 km away
  2. 2.9101 km SSE of Adak, Alaska · 403 days ago · 13 km deep · 8 km away
  3. 2.894 km SSE of Adak, Alaska · 403 days ago · 10 km deep · 13 km away
  4. 2.692 km SSE of Adak, Alaska · 403 days ago · 10 km deep · 13 km away
  5. 2.6107 km SSE of Adak, Alaska · 403 days ago · 10 km deep · 3 km away
  6. 2.191 km SSE of Adak, Alaska · 403 days ago · 15 km deep · 13 km away
  7. 1.891 km SSE of Adak, Alaska · 403 days ago · 17 km deep · 15 km away
  8. 2.596 km SSE of Adak, Alaska · 403 days ago · 10 km deep · 11 km away
  9. 1.846 km SSE of Adak, Alaska · 404 days ago · 29 km deep · 59 km away
  10. 1.962 km SE of Adak, Alaska · 404 days ago · 26 km deep · 61 km away
  11. 3.088 km SSE of Adak, Alaska · 404 days ago · 20 km deep · 18 km away
  12. 3.775 km SW of Adak, Alaska · 405 days ago · 40 km deep · 97 km away
  13. 2.565 km S of Adak, Alaska · 405 days ago · 35 km deep · 57 km away
  14. 1.964 km SE of Adak, Alaska · 405 days ago · 24 km deep · 47 km away
  15. 1.962 km SSE of Adak, Alaska · 405 days ago · 24 km deep · 47 km away
  16. 1.962 km SE of Adak, Alaska · 405 days ago · 23 km deep · 53 km away
  17. 1.866 km SSE of Adak, Alaska · 406 days ago · 23 km deep · 39 km away
  18. 2.193 km ESE of Adak, Alaska · 406 days ago · 42 km deep · 99 km away
  19. 1.954 km SSE of Adak, Alaska · 406 days ago · 26 km deep · 51 km away
  20. 3.093 km SW of Atka, Alaska · 406 days ago · 35 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000rlnb (also filed as ak025axt29rw). Read Sat, Oct 3, 2026, 6:47 AM UTC.