Alaska earthquakes

M3.4 earthquake 51 km E of Atka, Alaska

A magnitude 3.4 earthquake struck 51 km E of Atka, Alaska on Fri, Sep 26, 2025, 5:36 PM HADT (02:36 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.7 126 km ESE 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
3.4 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-09-27 02:36:18 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
52.130° N, 173.457° 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
3.4ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.115 · 10 stations
2.6ML, 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 2.4 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.12
Depth from
Operator assigned
Station coverage gap
199°, poorly surrounded by stations
Stations used
14

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.230 km E of Atka, Alaska · 370 days ago · 7 km deep · 22 km away
  2. 2.155 km SSW of Atka, Alaska · 367 days ago · 63 km deep · 80 km away
  3. 3.7126 km ESE of Atka, Alaska · 366 days ago · 35 km deep · 80 km away
  4. 3.5121 km SE of Atka, Alaska · 361 days ago · 17 km deep · 82 km away
  5. 1.716 km N of Atka, Alaska · 328 days ago · 4 km deep · 54 km away
  6. 2.117 km N of Atka, Alaska · 328 days ago · 4 km deep · 54 km away
  7. 1.616 km N of Atka, Alaska · 328 days ago · 4 km deep · 54 km away
  8. 1.616 km N of Atka, Alaska · 328 days ago · 5 km deep · 55 km away
  9. 2.327 km ENE of Atka, Alaska · 323 days ago · 95 km deep · 28 km away
  10. 3.167 km E of Atka, Alaska · 323 days ago · 91 km deep · 19 km away
  11. 1.520 km N of Atka, Alaska · 320 days ago · 0 km deep · 56 km away
  12. 1.919 km N of Atka, Alaska · 320 days ago · 1 km deep · 55 km away
  13. 3.487 km ESE of Atka, Alaska · 312 days ago · 10 km deep · 38 km away
  14. 2.853 km S of Atka, Alaska · 311 days ago · 8 km deep · 69 km away
  15. 2.862 km S of Atka, Alaska · 311 days ago · 10 km deep · 69 km away

Before

  1. 1.939 km ENE of Atka, Alaska · 375 days ago · 27 km deep · 27 km away
  2. 1.824 km N of Atka, Alaska · 380 days ago · 3 km deep · 57 km away
  3. 3.844 km SE of Atka, Alaska · 383 days ago · 41 km deep · 27 km away
  4. 1.518 km SW of Atka, Alaska · 386 days ago · 9 km deep · 65 km away
  5. 3.260 km ESE of Atka, Alaska · 387 days ago · 72 km deep · 21 km away
  6. 2.139 km S of Atka, Alaska · 394 days ago · 68 km deep · 65 km away
  7. 2.7102 km SSE of Atka, Alaska · 395 days ago · 35 km deep · 96 km away
  8. 4.598 km S of Atka, Alaska · 396 days ago · 10 km deep · 95 km away
  9. 3.066 km S of Atka, Alaska · 397 days ago · 24 km deep · 80 km away
  10. 4.080 km SSE of Atka, Alaska · 397 days ago · 35 km deep · 80 km away
  11. 3.788 km S of Atka, Alaska · 397 days ago · 35 km deep · 93 km away
  12. 1.714 km N of Atka, Alaska · 398 days ago · 4 km deep · 53 km away
  13. 3.8105 km ESE of Atka, Alaska · 400 days ago · 65 km deep · 55 km away
  14. 2.147 km ESE of Atka, Alaska · 400 days ago · 54 km deep · 20 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000rf86 (also filed as ak025cekibb8). Read Fri, Oct 2, 2026, 7:26 AM UTC.