Alaska earthquakes

M3.1 earthquake 92 km WNW of Atka, Alaska

A magnitude 3.1 earthquake struck 92 km WNW of Atka, Alaska on Sat, Sep 27, 2025, 8:53 AM HADT (17:53 UTC), 215 km (133 mi) below the surface.

A larger quake followed: M3.9 83 km SW of Atka, 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
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-09-27 17:53:17 UTC
Depth
214.8 km (133.4 mi), intermediate-depth
Epicenter
52.486° N, 175.476° 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
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.097 · 14 stations
3.0ML, 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 18.7 km horizontally, 14.8 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
170°
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 3.983 km SW of Atka, Alaska · 369 days ago · 35 km deep · 91 km away
  2. 3.979 km NE of Adak, Alaska · 366 days ago · 222 km deep · 25 km away
  3. 1.810 km NE of Adak, Alaska · 343 days ago · 28 km deep · 94 km away
  4. 3.679 km WSW of Atka, Alaska · 336 days ago · 60 km deep · 75 km away
  5. 1.716 km N of Atka, Alaska · 328 days ago · 4 km deep · 90 km away
  6. 2.117 km N of Atka, Alaska · 328 days ago · 4 km deep · 90 km away
  7. 1.616 km N of Atka, Alaska · 328 days ago · 4 km deep · 90 km away
  8. 1.616 km N of Atka, Alaska · 328 days ago · 5 km deep · 89 km away
  9. 1.520 km N of Atka, Alaska · 320 days ago · 0 km deep · 89 km away
  10. 1.919 km N of Atka, Alaska · 320 days ago · 1 km deep · 90 km away
  11. 1.639 km NE of Adak, Alaska · 316 days ago · 9 km deep · 65 km away
  12. 2.974 km E of Adak, Alaska · 316 days ago · 27 km deep · 80 km away
  13. 2.252 km NE of Adak, Alaska · 316 days ago · 186 km deep · 54 km away
  14. 2.371 km E of Adak, Alaska · 316 days ago · 70 km deep · 80 km away
  15. 2.746 km ENE of Adak, Alaska · 312 days ago · 132 km deep · 64 km away
  16. 3.743 km N of Adak, Alaska · 312 days ago · 223 km deep · 82 km away
  17. 3.783 km WSW of Atka, Alaska · 311 days ago · 56 km deep · 69 km away

Before

  1. 2.783 km W of Atka, Alaska · 370 days ago · 225 km deep · 22 km away
  2. 1.622 km E of Adak, Alaska · 380 days ago · 6 km deep · 86 km away
  3. 1.824 km N of Atka, Alaska · 380 days ago · 3 km deep · 90 km away
  4. 4.032 km NNE of Adak, Alaska · 383 days ago · 126 km deep · 75 km away · felt by 2
  5. 4.178 km WNW of Atka, Alaska · 384 days ago · 219 km deep · 16 km away
  6. 1.518 km SW of Atka, Alaska · 386 days ago · 9 km deep · 85 km away
  7. 1.635 km NE of Adak, Alaska · 388 days ago · 19 km deep · 69 km away
  8. 3.962 km NW of Atka, Alaska · 391 days ago · 209 km deep · 52 km away
  9. 2.582 km ESE of Adak, Alaska · 394 days ago · 50 km deep · 98 km away
  10. 1.585 km WSW of Atka, Alaska · 394 days ago · 17 km deep · 52 km away
  11. 4.099 km NW of Atka, Alaska · 397 days ago · 228 km deep · 53 km away
  12. 1.714 km N of Atka, Alaska · 398 days ago · 4 km deep · 91 km away
  13. 2.678 km ENE of Adak, Alaska · 400 days ago · 182 km deep · 29 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000rf7r (also filed as ak025cetjgtl). Read Fri, Oct 2, 2026, 2:40 PM UTC.