Alaska earthquakes

M3.0 earthquake 69 km SW of Atka, Alaska

A magnitude 3.0 earthquake struck 69 km SW of Atka, Alaska on Thu, Aug 21, 2025, 4:49 PM HADT (01:49 UTC), 35 km (22 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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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.0 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-08-22 01:49:25 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.730° N, 174.883° 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
3.0ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 12 stations
2.3ML, 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 3.5 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
205°, poorly surrounded by stations
Stations used
16

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 95 in the 30 days before it.

After

  1. 1.852 km SSW of Atka, Alaska · 406 days ago · 13 km deep · 27 km away
  2. 2.037 km WSW of Atka, Alaska · 405 days ago · 121 km deep · 37 km away
  3. 2.665 km SSE of Adak, Alaska · 405 days ago · 35 km deep · 94 km away
  4. 3.093 km SW of Atka, Alaska · 405 days ago · 35 km deep · 24 km away
  5. 1.968 km SSW of Atka, Alaska · 405 days ago · 16 km deep · 31 km away
  6. 2.193 km ESE of Adak, Alaska · 405 days ago · 42 km deep · 30 km away
  7. 1.962 km SE of Adak, Alaska · 404 days ago · 23 km deep · 86 km away
  8. 1.962 km SSE of Adak, Alaska · 404 days ago · 24 km deep · 95 km away
  9. 1.964 km SE of Adak, Alaska · 404 days ago · 24 km deep · 93 km away
  10. 3.865 km SE of Atka, Alaska · 404 days ago · 15 km deep · 94 km away
  11. 1.655 km ENE of Adak, Alaska · 404 days ago · 9 km deep · 83 km away
  12. 1.962 km SE of Adak, Alaska · 403 days ago · 26 km deep · 78 km away
  13. 2.070 km SSW of Atka, Alaska · 403 days ago · 40 km deep · 18 km away
  14. 2.011 km SW of Atka, Alaska · 403 days ago · 16 km deep · 58 km away
  15. 3.253 km SE of Adak, Alaska · 401 days ago · 35 km deep · 84 km away
  16. 3.452 km ESE of Atka, Alaska · 401 days ago · 59 km deep · 99 km away
  17. 1.989 km SW of Atka, Alaska · 400 days ago · 41 km deep · 25 km away
  18. 1.756 km SE of Adak, Alaska · 400 days ago · 25 km deep · 93 km away
  19. 2.147 km ESE of Atka, Alaska · 400 days ago · 54 km deep · 92 km away
  20. 2.678 km ENE of Adak, Alaska · 399 days ago · 182 km deep · 80 km away
  21. 1.714 km N of Atka, Alaska · 398 days ago · 4 km deep · 82 km away
  22. 2.7105 km SW of Atka, Alaska · 398 days ago · 35 km deep · 36 km away
  23. 3.788 km S of Atka, Alaska · 397 days ago · 35 km deep · 64 km away
  24. 2.147 km SE of Adak, Alaska · 397 days ago · 37 km deep · 93 km away
  25. 4.080 km SSE of Atka, Alaska · 397 days ago · 35 km deep · 69 km away
  26. 3.066 km S of Atka, Alaska · 397 days ago · 24 km deep · 46 km away
  27. 4.598 km S of Atka, Alaska · 396 days ago · 10 km deep · 79 km away
  28. 3.4108 km SSE of Atka, Alaska · 396 days ago · 35 km deep · 88 km away
  29. 3.7111 km S of Atka, Alaska · 395 days ago · 10 km deep · 85 km away
  30. 4.7107 km S of Atka, Alaska · 395 days ago · 13 km deep · 84 km away
  31. 2.7102 km SSE of Atka, Alaska · 395 days ago · 35 km deep · 87 km away
  32. 1.953 km SSE of Adak, Alaska · 395 days ago · 56 km deep · 98 km away
  33. 1.953 km SE of Adak, Alaska · 395 days ago · 56 km deep · 85 km away
  34. 2.139 km S of Atka, Alaska · 394 days ago · 68 km deep · 43 km away
  35. 2.773 km SSE of Adak, Alaska · 394 days ago · 25 km deep · 95 km away
  36. 1.585 km WSW of Atka, Alaska · 394 days ago · 17 km deep · 49 km away
  37. 2.582 km ESE of Adak, Alaska · 394 days ago · 50 km deep · 46 km away
  38. 1.635 km NE of Adak, Alaska · 388 days ago · 19 km deep · 99 km away
  39. 1.518 km SW of Atka, Alaska · 386 days ago · 9 km deep · 52 km away
  40. 4.178 km WNW of Atka, Alaska · 384 days ago · 219 km deep · 88 km away
  41. 3.844 km SE of Atka, Alaska · 383 days ago · 41 km deep · 85 km away
  42. 1.824 km N of Atka, Alaska · 380 days ago · 3 km deep · 90 km away
  43. 4.586 km S of Atka, Alaska · 372 days ago · 16 km deep · 48 km away
  44. 2.230 km E of Atka, Alaska · 370 days ago · 7 km deep · 94 km away
  45. 2.066 km SE of Adak, Alaska · 370 days ago · 26 km deep · 88 km away
  46. 2.783 km W of Atka, Alaska · 370 days ago · 225 km deep · 72 km away
  47. 3.192 km WNW of Atka, Alaska · 370 days ago · 215 km deep · 93 km away
  48. 3.983 km SW of Atka, Alaska · 369 days ago · 35 km deep · 16 km away
  49. 2.155 km SSW of Atka, Alaska · 367 days ago · 63 km deep · 32 km away
  50. 3.979 km NE of Adak, Alaska · 365 days ago · 222 km deep · 95 km away
  51. 4.4100 km SW of Atka, Alaska · 359 days ago · 35 km deep · 31 km away
  52. 2.672 km SE of Adak, Alaska · 349 days ago · 35 km deep · 88 km away
  53. 1.989 km ESE of Adak, Alaska · 349 days ago · 19 km deep · 46 km away

Before

  1. 1.957 km WSW of Atka, Alaska · 408 days ago · 69 km deep · 24 km away
  2. 1.799 km SW of Atka, Alaska · 408 days ago · 26 km deep · 30 km away
  3. 2.281 km SSE of Atka, Alaska · 408 days ago · 17 km deep · 85 km away
  4. 1.960 km SE of Adak, Alaska · 408 days ago · 23 km deep · 83 km away
  5. 3.164 km SE of Adak, Alaska · 409 days ago · 35 km deep · 83 km away
  6. 2.798 km ESE of Adak, Alaska · 409 days ago · 35 km deep · 30 km away
  7. 1.844 km ESE of Atka, Alaska · 409 days ago · 9 km deep · 94 km away
  8. 1.563 km SE of Adak, Alaska · 409 days ago · 26 km deep · 79 km away
  9. 1.663 km SE of Adak, Alaska · 409 days ago · 26 km deep · 91 km away
  10. 2.815 km SSE of Atka, Alaska · 409 days ago · 75 km deep · 68 km away
  11. 1.862 km SE of Adak, Alaska · 409 days ago · 26 km deep · 78 km away
  12. 3.154 km SE of Adak, Alaska · 410 days ago · 35 km deep · 93 km away
  13. 2.845 km SSE of Atka, Alaska · 410 days ago · 77 km deep · 65 km away
  14. 1.754 km SW of Atka, Alaska · 410 days ago · 64 km deep · 21 km away
  15. 1.888 km SSE of Atka, Alaska · 410 days ago · 39 km deep · 99 km away
  16. 1.873 km SE of Atka, Alaska · 410 days ago · 41 km deep · 89 km away
  17. 1.8134 km S of Atka, Alaska · 410 days ago · 10 km deep · 100 km away
  18. 1.749 km SE of Atka, Alaska · 410 days ago · 69 km deep · 87 km away
  19. 1.868 km WSW of Atka, Alaska · 410 days ago · 126 km deep · 39 km away
  20. 1.770 km SSE of Atka, Alaska · 410 days ago · 3 km deep · 73 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000rjc8 (also filed as ak025ar0n76p). Read Fri, Oct 2, 2026, 7:27 AM UTC.