Alaska earthquakes

M1.9 earthquake 21 km ESE of Unalaska, Alaska

A magnitude 1.9 earthquake struck 21 km ESE of Unalaska, Alaska on Thu, Aug 28, 2025, 6:50 AM AKDT (14:50 UTC), 79 km (49 mi) below the surface.

A larger quake followed: M5.1 49 km S of Akutan, 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
1.9 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2025-08-28 14:50:41 UTC
Depth
79.2 km (49.2 mi), intermediate-depth
Epicenter
53.793° N, 166.245° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used
19

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 63 in the 30 days before it.

After

  1. 1.926 km SE of Unalaska, Alaska · 401 days ago · 72 km deep · 7 km away
  2. 3.535 km SE of Akutan, Alaska · 400 days ago · 66 km deep · 60 km away
  3. 1.9102 km SE of Unalaska, Alaska · 399 days ago · 13 km deep · 84 km away
  4. 2.661 km SE of Akutan, Alaska · 398 days ago · 35 km deep · 74 km away
  5. 1.567 km SE of Unalaska, Alaska · 398 days ago · 26 km deep · 50 km away
  6. 1.933 km SW of Unalaska, Alaska · 398 days ago · 75 km deep · 42 km away
  7. 2.616 km SE of Unalaska, Alaska · 398 days ago · 81 km deep · 8 km away
  8. 2.755 km SW of Unalaska, Alaska · 398 days ago · 17 km deep · 65 km away
  9. 4.426 km W of Akutan, Alaska · 395 days ago · 103 km deep · 41 km away
  10. 2.111 km NW of Dutch Harbor, Alaska · 377 days ago · 11 km deep · 33 km away
  11. 2.924 km ENE of Dutch Harbor, Alaska · 373 days ago · 127 km deep · 24 km away
  12. 1.753 km SW of Unalaska, Alaska · 373 days ago · 15 km deep · 66 km away
  13. 3.765 km SE of Unalaska, Alaska · 365 days ago · 53 km deep · 47 km away
  14. 3.752 km ESE of Akutan, Alaska · 359 days ago · 78 km deep · 83 km away
  15. 5.149 km S of Akutan, Alaska · 353 days ago · 85 km deep · 29 km away · felt by 20 · tsunami flag
  16. 1.69 km N of Dutch Harbor, Alaska · 352 days ago · 7 km deep · 28 km away
  17. 2.8101 km S of Unalaska, Alaska · 352 days ago · 35 km deep · 94 km away
  18. 1.641 km SE of Akutan, Alaska · 352 days ago · 51 km deep · 61 km away
  19. 1.613 km SSW of Unalaska, Alaska · 347 days ago · 9 km deep · 24 km away
  20. 3.658 km SE of Akutan, Alaska · 344 days ago · 72 km deep · 67 km away

Before

  1. 1.850 km SW of Unalaska, Alaska · 404 days ago · 18 km deep · 60 km away
  2. 2.784 km SE of Akutan, Alaska · 405 days ago · 35 km deep · 99 km away
  3. 1.630 km SSW of Unalaska, Alaska · 405 days ago · 78 km deep · 34 km away
  4. 1.860 km SSE of Unalaska, Alaska · 406 days ago · 53 km deep · 46 km away
  5. 2.624 km SE of Unalaska, Alaska · 406 days ago · 74 km deep · 6 km away
  6. 1.587 km SSW of Unalaska, Alaska · 407 days ago · 26 km deep · 86 km away
  7. 1.875 km SE of Unalaska, Alaska · 407 days ago · 39 km deep · 55 km away
  8. 1.526 km NW of Akutan, Alaska · 408 days ago · 117 km deep · 58 km away
  9. 2.674 km SSE of Unalaska, Alaska · 408 days ago · 35 km deep · 63 km away
  10. 1.688 km SE of Akutan, Alaska · 408 days ago · 28 km deep · 94 km away
  11. 1.726 km NW of Akutan, Alaska · 408 days ago · 100 km deep · 54 km away
  12. 3.166 km SE of Unalaska, Alaska · 408 days ago · 35 km deep · 47 km away
  13. 1.854 km NNW of Dutch Harbor, Alaska · 409 days ago · 160 km deep · 75 km away
  14. 1.781 km SSE of Unalaska, Alaska · 412 days ago · 21 km deep · 68 km away
  15. 1.876 km S of Unalaska, Alaska · 412 days ago · 50 km deep · 74 km away
  16. 2.634 km SW of Unalaska, Alaska · 413 days ago · 79 km deep · 47 km away
  17. 1.596 km SSW of Unalaska, Alaska · 413 days ago · 26 km deep · 97 km away
  18. 1.593 km SSW of Unalaska, Alaska · 413 days ago · 26 km deep · 95 km away
  19. 1.554 km SW of Unalaska, Alaska · 413 days ago · 16 km deep · 66 km away
  20. 1.984 km SSW of Unalaska, Alaska · 414 days ago · 28 km deep · 83 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak025b15m61v. Read Mon, Oct 5, 2026, 9:40 AM UTC.