Alaska earthquakes

M1.6 earthquake 22 km E of Adak, Alaska

A magnitude 1.6 earthquake struck 22 km E of Adak, Alaska on Wed, Sep 17, 2025, 5:39 PM HADT (02:39 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M4.9 71 km SSW 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
1.6 (ML, local (Richter)), micro
Magnitude from
AV
Local time
UTC
2025-09-18 02:39:29 UTC
Depth
5.5 km (3.4 mi), shallow
Epicenter
51.908° N, 176.313° 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 0.7 km horizontally, 1.7 km in depth
Magnitude uncertainty
±0.29
Depth from
From location
Station coverage gap
161°
Stations used
11

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 62 in the 30 days before it.

After

  1. 4.095 km SSE of Adak, Alaska · 372 days ago · 10 km deep · 91 km away · felt by 1
  2. 1.850 km SW of Adak, Alaska · 370 days ago · 15 km deep · 70 km away
  3. 1.866 km SSE of Adak, Alaska · 370 days ago · 21 km deep · 65 km away
  4. 2.066 km SE of Adak, Alaska · 370 days ago · 26 km deep · 59 km away
  5. 2.783 km W of Atka, Alaska · 370 days ago · 225 km deep · 75 km away
  6. 3.192 km WNW of Atka, Alaska · 370 days ago · 215 km deep · 86 km away
  7. 3.983 km SW of Atka, Alaska · 369 days ago · 35 km deep · 86 km away
  8. 1.651 km SW of Adak, Alaska · 368 days ago · 14 km deep · 72 km away
  9. 3.979 km NE of Adak, Alaska · 365 days ago · 222 km deep · 63 km away
  10. 2.757 km SSW of Adak, Alaska · 362 days ago · 34 km deep · 71 km away
  11. 4.4100 km SW of Atka, Alaska · 359 days ago · 35 km deep · 82 km away
  12. 1.655 km W of Adak, Alaska · 356 days ago · -2 km deep · 77 km away
  13. 1.975 km W of Adak, Alaska · 356 days ago · 8 km deep · 97 km away
  14. 2.672 km SE of Adak, Alaska · 349 days ago · 35 km deep · 65 km away
  15. 2.454 km SW of Adak, Alaska · 349 days ago · 36 km deep · 72 km away
  16. 1.989 km ESE of Adak, Alaska · 349 days ago · 19 km deep · 72 km away
  17. 1.618 km W of Adak, Alaska · 347 days ago · 3 km deep · 40 km away
  18. 4.971 km SSW of Adak, Alaska · 347 days ago · 37 km deep · 86 km away · felt by 2
  19. 1.810 km NE of Adak, Alaska · 343 days ago · 28 km deep · 16 km away
  20. 4.947 km SE of Adak, Alaska · 342 days ago · 57 km deep · 39 km away · felt by 1
  21. 1.576 km WSW of Adak, Alaska · 339 days ago · 18 km deep · 99 km away
  22. 3.679 km WSW of Atka, Alaska · 336 days ago · 60 km deep · 77 km away
  23. 4.098 km ESE of Adak, Alaska · 327 days ago · 41 km deep · 80 km away
  24. 3.010 km S of Adak, Alaska · 323 days ago · 67 km deep · 25 km away
  25. 3.676 km SSW of Adak, Alaska · 323 days ago · 35 km deep · 90 km away
  26. 2.6101 km SW of Atka, Alaska · 323 days ago · 10 km deep · 99 km away

Before

  1. 4.032 km NNE of Adak, Alaska · 383 days ago · 126 km deep · 26 km away · felt by 2
  2. 4.178 km WNW of Atka, Alaska · 384 days ago · 219 km deep · 97 km away
  3. 1.635 km NE of Adak, Alaska · 388 days ago · 19 km deep · 18 km away
  4. 2.582 km ESE of Adak, Alaska · 394 days ago · 50 km deep · 64 km away
  5. 1.585 km WSW of Atka, Alaska · 394 days ago · 17 km deep · 63 km away
  6. 2.773 km SSE of Adak, Alaska · 394 days ago · 25 km deep · 68 km away
  7. 2.740 km SW of Adak, Alaska · 394 days ago · 77 km deep · 62 km away
  8. 1.953 km SE of Adak, Alaska · 395 days ago · 56 km deep · 45 km away
  9. 1.953 km SSE of Adak, Alaska · 395 days ago · 56 km deep · 50 km away
  10. 3.340 km NNW of Adak, Alaska · 395 days ago · 173 km deep · 53 km away
  11. 2.031 km SSW of Adak, Alaska · 396 days ago · 63 km deep · 46 km away
  12. 2.147 km SE of Adak, Alaska · 397 days ago · 37 km deep · 41 km away
  13. 2.7105 km SW of Atka, Alaska · 398 days ago · 35 km deep · 100 km away
  14. 2.678 km ENE of Adak, Alaska · 399 days ago · 182 km deep · 58 km away
  15. 1.756 km SE of Adak, Alaska · 400 days ago · 25 km deep · 51 km away
  16. 1.642 km SSE of Adak, Alaska · 400 days ago · 36 km deep · 41 km away
  17. 1.989 km SW of Atka, Alaska · 400 days ago · 41 km deep · 77 km away
  18. 2.094 km SSE of Adak, Alaska · 400 days ago · 26 km deep · 92 km away
  19. 2.799 km SSE of Adak, Alaska · 400 days ago · 33 km deep · 98 km away
  20. 2.290 km SSE of Adak, Alaska · 400 days ago · 13 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event av93775613. Read Fri, Oct 2, 2026, 8:09 AM UTC.