Alaska earthquakes

M2.5 earthquake 93 km WSW of Unalaska, Alaska

A magnitude 2.5 earthquake struck 93 km WSW of Unalaska, Alaska on Sat, Aug 30, 2025, 7:54 PM AKDT (03:54 UTC), 100 km (62 mi) below the surface.

A larger quake followed: M3.8 38 km NNE of Nikolski, 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
2.5 (ml), micro
Local time
UTC
2025-08-31 03:54:13 UTC
Depth
99.8 km (62.0 mi), intermediate-depth
Epicenter
53.518° N, 167.812° 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.

Location uncertainty
About 9.7 km horizontally, 5.6 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
178°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 44 in the 30 days before it.

After

  1. 1.935 km ESE of Nikolski, Alaska · 393 days ago · 61 km deep · 87 km away
  2. 1.933 km SW of Unalaska, Alaska · 393 days ago · 75 km deep · 66 km away
  3. 2.616 km SE of Unalaska, Alaska · 393 days ago · 81 km deep · 100 km away
  4. 2.755 km SW of Unalaska, Alaska · 393 days ago · 17 km deep · 47 km away
  5. 3.838 km NNE of Nikolski, Alaska · 385 days ago · 94 km deep · 60 km away
  6. 3.333 km ESE of Nikolski, Alaska · 381 days ago · 52 km deep · 82 km away
  7. 2.111 km NW of Dutch Harbor, Alaska · 372 days ago · 11 km deep · 89 km away
  8. 1.753 km SW of Unalaska, Alaska · 368 days ago · 15 km deep · 42 km away
  9. 3.789 km E of Nikolski, Alaska · 365 days ago · 82 km deep · 57 km away
  10. 2.355 km ESE of Nikolski, Alaska · 350 days ago · 23 km deep · 87 km away
  11. 3.070 km ESE of Nikolski, Alaska · 350 days ago · 35 km deep · 84 km away
  12. 1.69 km N of Dutch Harbor, Alaska · 347 days ago · 7 km deep · 98 km away
  13. 1.613 km SSW of Unalaska, Alaska · 342 days ago · 9 km deep · 84 km away

Before

  1. 2.3103 km E of Nikolski, Alaska · 395 days ago · 47 km deep · 82 km away
  2. 3.0112 km N of Nikolski, Alaska · 396 days ago · 101 km deep · 71 km away
  3. 3.1111 km N of Nikolski, Alaska · 396 days ago · 88 km deep · 67 km away
  4. 1.850 km SW of Unalaska, Alaska · 399 days ago · 18 km deep · 50 km away
  5. 2.850 km N of Nikolski, Alaska · 399 days ago · 17 km deep · 73 km away
  6. 1.630 km SSW of Unalaska, Alaska · 400 days ago · 78 km deep · 76 km away
  7. 1.587 km SSW of Unalaska, Alaska · 402 days ago · 26 km deep · 78 km away
  8. 1.7110 km E of Nikolski, Alaska · 402 days ago · 38 km deep · 81 km away
  9. 1.874 km ESE of Nikolski, Alaska · 404 days ago · 25 km deep · 89 km away
  10. 1.916 km ENE of Nikolski, Alaska · 406 days ago · 31 km deep · 79 km away
  11. 1.876 km S of Unalaska, Alaska · 407 days ago · 50 km deep · 79 km away
  12. 2.634 km SW of Unalaska, Alaska · 408 days ago · 79 km deep · 60 km away
  13. 1.7101 km SSW of Unalaska, Alaska · 408 days ago · 32 km deep · 53 km away
  14. 2.88 km NE of Nikolski, Alaska · 408 days ago · 74 km deep · 86 km away
  15. 1.596 km SSW of Unalaska, Alaska · 408 days ago · 26 km deep · 68 km away
  16. 1.593 km SSW of Unalaska, Alaska · 408 days ago · 26 km deep · 67 km away
  17. 1.554 km SW of Unalaska, Alaska · 408 days ago · 16 km deep · 42 km away
  18. 1.984 km SSW of Unalaska, Alaska · 409 days ago · 28 km deep · 78 km away
  19. 3.469 km NE of Nikolski, Alaska · 409 days ago · 121 km deep · 27 km away
  20. 1.635 km SSW of Unalaska, Alaska · 411 days ago · 71 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000rmcr (also filed as ak025b5xp8jt). Read Wed, Sep 30, 2026, 9:27 AM UTC.