Alaska earthquakes

M2.9 earthquake 93 km ESE of Atka, Alaska

A magnitude 2.9 earthquake struck 93 km ESE of Atka, Alaska on Mon, Aug 18, 2025, 3:32 AM HADT (12:32 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.7 107 km S 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
2.9 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-08-18 12:32:25 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.871° N, 172.937° 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
2.9ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.091 · 16 stations
2.6ML, 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 6.0 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
202°, poorly surrounded by stations
Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 46 in the 30 days before it.

After

  1. 2.845 km SSE of Atka, Alaska · 410 days ago · 77 km deep · 70 km away
  2. 2.815 km SSE of Atka, Alaska · 409 days ago · 75 km deep · 81 km away
  3. 1.844 km ESE of Atka, Alaska · 409 days ago · 9 km deep · 50 km away
  4. 2.799 km E of Atka, Alaska · 409 days ago · 9 km deep · 57 km away
  5. 2.281 km SSE of Atka, Alaska · 408 days ago · 17 km deep · 64 km away
  6. 2.7120 km E of Atka, Alaska · 407 days ago · 45 km deep · 42 km away
  7. 2.7121 km ESE of Atka, Alaska · 405 days ago · 35 km deep · 28 km away
  8. 2.2132 km E of Atka, Alaska · 405 days ago · 59 km deep · 62 km away
  9. 3.865 km SE of Atka, Alaska · 404 days ago · 15 km deep · 42 km away
  10. 2.011 km SW of Atka, Alaska · 403 days ago · 16 km deep · 99 km away
  11. 3.452 km ESE of Atka, Alaska · 401 days ago · 59 km deep · 41 km away
  12. 2.162 km ESE of Atka, Alaska · 401 days ago · 65 km deep · 32 km away
  13. 2.147 km ESE of Atka, Alaska · 400 days ago · 54 km deep · 47 km away
  14. 3.8105 km ESE of Atka, Alaska · 400 days ago · 65 km deep · 14 km away
  15. 1.714 km N of Atka, Alaska · 398 days ago · 4 km deep · 98 km away
  16. 3.788 km S of Atka, Alaska · 397 days ago · 35 km deep · 97 km away
  17. 4.080 km SSE of Atka, Alaska · 397 days ago · 35 km deep · 83 km away
  18. 3.066 km S of Atka, Alaska · 397 days ago · 24 km deep · 95 km away
  19. 4.598 km S of Atka, Alaska · 397 days ago · 10 km deep · 92 km away
  20. 3.4108 km SSE of Atka, Alaska · 396 days ago · 35 km deep · 96 km away
  21. 4.7107 km S of Atka, Alaska · 395 days ago · 13 km deep · 99 km away
  22. 2.7102 km SSE of Atka, Alaska · 395 days ago · 35 km deep · 89 km away
  23. 2.139 km S of Atka, Alaska · 395 days ago · 68 km deep · 92 km away
  24. 2.7136 km SSE of Atka, Alaska · 394 days ago · 20 km deep · 98 km away
  25. 3.260 km ESE of Atka, Alaska · 387 days ago · 72 km deep · 34 km away
  26. 3.844 km SE of Atka, Alaska · 383 days ago · 41 km deep · 53 km away
  27. 1.939 km ENE of Atka, Alaska · 375 days ago · 27 km deep · 72 km away
  28. 3.451 km E of Atka, Alaska · 370 days ago · 10 km deep · 46 km away
  29. 2.230 km E of Atka, Alaska · 370 days ago · 7 km deep · 67 km away
  30. 3.7126 km ESE of Atka, Alaska · 366 days ago · 35 km deep · 35 km away
  31. 3.5121 km SE of Atka, Alaska · 361 days ago · 17 km deep · 41 km away

Before

  1. 1.888 km SSE of Atka, Alaska · 410 days ago · 39 km deep · 54 km away
  2. 1.873 km SE of Atka, Alaska · 410 days ago · 41 km deep · 51 km away
  3. 1.749 km SE of Atka, Alaska · 410 days ago · 69 km deep · 50 km away
  4. 2.731 km ENE of Atka, Alaska · 410 days ago · 170 km deep · 80 km away
  5. 1.770 km SSE of Atka, Alaska · 411 days ago · 3 km deep · 69 km away
  6. 3.976 km SE of Atka, Alaska · 411 days ago · 35 km deep · 40 km away
  7. 2.962 km SSE of Atka, Alaska · 411 days ago · 35 km deep · 55 km away
  8. 3.267 km SE of Atka, Alaska · 411 days ago · 35 km deep · 51 km away
  9. 3.871 km SE of Atka, Alaska · 411 days ago · 56 km deep · 45 km away
  10. 3.1128 km E of Atka, Alaska · 411 days ago · 78 km deep · 57 km away
  11. 2.561 km E of Atka, Alaska · 412 days ago · 9 km deep · 47 km away
  12. 2.725 km NE of Atka, Alaska · 413 days ago · 170 km deep · 84 km away
  13. 1.877 km ESE of Atka, Alaska · 413 days ago · 46 km deep · 17 km away
  14. 1.630 km SE of Atka, Alaska · 414 days ago · 79 km deep · 65 km away
  15. 3.435 km S of Atka, Alaska · 416 days ago · 84 km deep · 89 km away
  16. 3.867 km ESE of Atka, Alaska · 417 days ago · 35 km deep · 28 km away
  17. 2.978 km ENE of Atka, Alaska · 418 days ago · 22 km deep · 71 km away
  18. 3.3139 km E of Atka, Alaska · 419 days ago · 24 km deep · 66 km away
  19. 2.476 km ESE of Atka, Alaska · 419 days ago · 13 km deep · 23 km away
  20. 2.167 km SSE of Atka, Alaska · 421 days ago · 19 km deep · 72 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ridn (also filed as ak025akkxxyz). Read Fri, Oct 2, 2026, 9:54 AM UTC.