Alaska earthquakes

M3.6 earthquake 209 km SSE of Atka, Alaska

A magnitude 3.6 earthquake struck 209 km SSE of Atka, Alaska on Tue, May 27, 2025, 1:26 PM HADT (22:26 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.8 197 km SSE 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
3.6 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-05-27 22:26:05 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.431° N, 173.167° 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
3.6ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.091 · 16 stations
3.3ML, 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 4.4 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
237°, poorly surrounded by stations
Stations used
31

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.6152 km S of Atka, Alaska · 493 days ago · 10 km deep · 64 km away
  2. 2.3193 km SE of Atka, Alaska · 487 days ago · 5 km deep · 66 km away
  3. 3.8197 km SSE of Atka, Alaska · 486 days ago · 10 km deep · 14 km away
  4. 2.9184 km SSE of Atka, Alaska · 482 days ago · 10 km deep · 40 km away
  5. 3.6212 km SE of Atka, Alaska · 480 days ago · 10 km deep · 90 km away
  6. 2.6176 km SSE of Atka, Alaska · 479 days ago · 10 km deep · 43 km away
  7. 2.6189 km SSE of Atka, Alaska · 479 days ago · 10 km deep · 20 km away
  8. 3.0151 km SSE of Atka, Alaska · 479 days ago · 10 km deep · 67 km away
  9. 2.9199 km SSE of Atka, Alaska · 477 days ago · 10 km deep · 30 km away
  10. 2.9141 km S of Atka, Alaska · 466 days ago · 10 km deep · 80 km away
  11. 3.8227 km SSE of Atka, Alaska · 465 days ago · 10 km deep · 20 km away
  12. 2.7145 km SE of Atka, Alaska · 456 days ago · 10 km deep · 89 km away
  13. 3.2204 km SSE of Atka, Alaska · 454 days ago · 10 km deep · 18 km away
  14. 2.9182 km SSE of Atka, Alaska · 452 days ago · 10 km deep · 31 km away
  15. 2.0162 km S of Atka, Alaska · 451 days ago · 23 km deep · 65 km away
  16. 3.5206 km SSE of Atka, Alaska · 449 days ago · 10 km deep · 10 km away
  17. 2.6126 km S of Atka, Alaska · 449 days ago · 10 km deep · 92 km away
  18. 2.0130 km S of Atka, Alaska · 437 days ago · 15 km deep · 96 km away
  19. 1.9143 km SSE of Atka, Alaska · 436 days ago · 7 km deep · 70 km away

Before

  1. 2.9184 km S of Atka, Alaska · 499 days ago · 10 km deep · 87 km away
  2. 2.7210 km S of Atka, Alaska · 499 days ago · 10 km deep · 72 km away
  3. 2.5182 km SSE of Atka, Alaska · 506 days ago · 10 km deep · 33 km away
  4. 2.7154 km S of Atka, Alaska · 506 days ago · 10 km deep · 67 km away
  5. 2.7125 km SSE of Atka, Alaska · 507 days ago · 10 km deep · 83 km away
  6. 2.7179 km S of Atka, Alaska · 512 days ago · 10 km deep · 52 km away
  7. 3.9198 km SSE of Atka, Alaska · 513 days ago · 10 km deep · 25 km away
  8. 2.6152 km S of Atka, Alaska · 516 days ago · 10 km deep · 69 km away
  9. 2.2166 km S of Atka, Alaska · 521 days ago · 4 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000qhkf (also filed as ak0256rh96jh). Read Mon, Oct 5, 2026, 3:11 AM UTC.