Alaska earthquakes

M3.7 earthquake 264 km W of Adak, Alaska

A magnitude 3.7 earthquake struck 264 km W of Adak, Alaska on Sat, Aug 30, 2025, 10:12 AM GMT+12 (22:12 UTC), 77 km (48 mi) below the surface.

A larger quake followed: M4.5 261 km W 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
3.7 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-08-29 22:12:17 UTC
Depth
76.9 km (47.8 mi), intermediate-depth
Epicenter
51.596° N, 179.566° E
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
3.7ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.085 · 18 stations
3.4ML, 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 9.6 km horizontally, 13.9 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
125°
Stations used
24

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 101 in the 30 days before it.

After

  1. 2.7265 km W of Adak, Alaska · 397 days ago · 78 km deep · 3 km away
  2. 2.0Rat Islands, Aleutian Islands, Alaska · 396 days ago · 36 km deep · 79 km away
  3. 1.8Rat Islands, Aleutian Islands, Alaska · 395 days ago · 9 km deep · 96 km away
  4. 2.1Rat Islands, Aleutian Islands, Alaska · 395 days ago · 148 km deep · 65 km away
  5. 1.6246 km WSW of Adak, Alaska · 395 days ago · 45 km deep · 27 km away
  6. 1.6266 km W of Adak, Alaska · 394 days ago · 68 km deep · 4 km away
  7. 1.6222 km W of Adak, Alaska · 394 days ago · 95 km deep · 46 km away
  8. 2.5240 km WSW of Adak, Alaska · 394 days ago · 5 km deep · 86 km away
  9. 2.1187 km WSW of Adak, Alaska · 386 days ago · 18 km deep · 90 km away
  10. 4.5261 km W of Adak, Alaska · 384 days ago · 73 km deep · 14 km away
  11. 1.7Rat Islands, Aleutian Islands, Alaska · 382 days ago · 5 km deep · 89 km away
  12. 1.6Rat Islands, Aleutian Islands, Alaska · 382 days ago · 6 km deep · 82 km away
  13. 4.5Rat Islands, Aleutian Islands, Alaska · 381 days ago · 113 km deep · 98 km away
  14. 3.2231 km WSW of Adak, Alaska · 381 days ago · 15 km deep · 38 km away
  15. 3.7Rat Islands, Aleutian Islands, Alaska · 378 days ago · 113 km deep · 96 km away
  16. 2.0Rat Islands, Aleutian Islands, Alaska · 377 days ago · 4 km deep · 61 km away
  17. 1.6Rat Islands, Aleutian Islands, Alaska · 373 days ago · 8 km deep · 88 km away
  18. 2.0264 km W of Adak, Alaska · 371 days ago · 4 km deep · 24 km away
  19. 2.6171 km W of Adak, Alaska · 371 days ago · 88 km deep · 93 km away
  20. 2.6225 km W of Adak, Alaska · 371 days ago · 84 km deep · 39 km away
  21. 1.9253 km W of Adak, Alaska · 369 days ago · 3 km deep · 31 km away
  22. 2.2257 km W of Adak, Alaska · 369 days ago · 12 km deep · 36 km away
  23. 1.9258 km W of Adak, Alaska · 367 days ago · 9 km deep · 34 km away
  24. 3.2236 km WSW of Adak, Alaska · 363 days ago · 11 km deep · 70 km away
  25. 4.2200 km W of Adak, Alaska · 362 days ago · 79 km deep · 65 km away
  26. 3.8253 km W of Adak, Alaska · 362 days ago · 173 km deep · 62 km away
  27. 4.2Rat Islands, Aleutian Islands, Alaska · 362 days ago · 18 km deep · 78 km away
  28. 4.5240 km WSW of Adak, Alaska · 356 days ago · 35 km deep · 77 km away
  29. 3.4246 km WSW of Adak, Alaska · 356 days ago · 35 km deep · 86 km away
  30. 1.7260 km W of Adak, Alaska · 356 days ago · 8 km deep · 35 km away
  31. 1.9259 km W of Adak, Alaska · 354 days ago · 7 km deep · 44 km away
  32. 2.8221 km W of Adak, Alaska · 350 days ago · 10 km deep · 43 km away
  33. 2.8206 km W of Adak, Alaska · 349 days ago · 96 km deep · 58 km away

Before

  1. 5.1260 km W of Adak, Alaska · 399 days ago · 81 km deep · 13 km away · tsunami flag
  2. 2.0211 km W of Adak, Alaska · 400 days ago · 58 km deep · 54 km away
  3. 2.1Rat Islands, Aleutian Islands, Alaska · 400 days ago · 122 km deep · 99 km away
  4. 1.9237 km W of Adak, Alaska · 400 days ago · 119 km deep · 38 km away
  5. 2.0237 km W of Adak, Alaska · 400 days ago · 127 km deep · 38 km away
  6. 2.2236 km W of Adak, Alaska · 400 days ago · 129 km deep · 42 km away
  7. 2.3239 km W of Adak, Alaska · 400 days ago · 127 km deep · 38 km away
  8. 5.9237 km W of Adak, Alaska · 400 days ago · 130 km deep · 64 km away · felt by 2 · tsunami flag
  9. 1.7Rat Islands, Aleutian Islands, Alaska · 400 days ago · 36 km deep · 55 km away
  10. 1.7201 km WSW of Adak, Alaska · 400 days ago · 43 km deep · 69 km away
  11. 2.8Rat Islands, Aleutian Islands, Alaska · 400 days ago · 106 km deep · 77 km away
  12. 1.8250 km W of Adak, Alaska · 401 days ago · 83 km deep · 17 km away
  13. 2.5192 km W of Adak, Alaska · 401 days ago · 128 km deep · 74 km away
  14. 1.9180 km W of Adak, Alaska · 401 days ago · 100 km deep · 85 km away
  15. 2.7Rat Islands, Aleutian Islands, Alaska · 401 days ago · 124 km deep · 84 km away
  16. 2.6Rat Islands, Aleutian Islands, Alaska · 402 days ago · 67 km deep · 77 km away
  17. 4.0Rat Islands, Aleutian Islands, Alaska · 403 days ago · 91 km deep · 83 km away
  18. 3.0Rat Islands, Aleutian Islands, Alaska · 403 days ago · 97 km deep · 91 km away
  19. 1.9Rat Islands, Aleutian Islands, Alaska · 403 days ago · 53 km deep · 50 km away
  20. 2.0Rat Islands, Aleutian Islands, Alaska · 403 days ago · 40 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000rmu7 (also filed as ak025b2xos92). Read Fri, Oct 2, 2026, 1:04 PM UTC.