Alaska earthquakes

M2.7 earthquake 186 km E of Atka, Alaska

A magnitude 2.7 earthquake struck 186 km E of Atka, Alaska on Fri, May 9, 2025, 12:20 PM HADT (21:20 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.4 178 km ESE of Atka, 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
2.7 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-05-09 21:20:41 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.928° N, 171.521° 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
2.7ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 12 stations
2.9ML, 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 7.7 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
214°, poorly surrounded by stations
Stations used
18

Nearby

Within 100 km, magnitude 1.5 and up: 23 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 3.0193 km ESE of Atka, Alaska · 511 days ago · 35 km deep · 11 km away
  2. 3.1187 km WSW of Nikolski, Alaska · 511 days ago · 66 km deep · 44 km away
  3. 3.8185 km SW of Nikolski, Alaska · 504 days ago · 35 km deep · 29 km away
  4. 3.0185 km ESE of Atka, Alaska · 496 days ago · 35 km deep · 10 km away
  5. 3.1139 km E of Atka, Alaska · 494 days ago · 106 km deep · 57 km away
  6. 2.8119 km ESE of Atka, Alaska · 494 days ago · 35 km deep · 87 km away
  7. 2.7168 km SW of Nikolski, Alaska · 485 days ago · 35 km deep · 47 km away
  8. 2.2117 km ESE of Atka, Alaska · 483 days ago · 26 km deep · 74 km away
  9. 2.0107 km ESE of Atka, Alaska · 483 days ago · 12 km deep · 83 km away
  10. 2.1111 km ESE of Atka, Alaska · 483 days ago · 13 km deep · 81 km away
  11. 3.8194 km E of Atka, Alaska · 483 days ago · 35 km deep · 14 km away
  12. 4.4178 km ESE of Atka, Alaska · 483 days ago · 30 km deep · 35 km away
  13. 2.997 km E of Atka, Alaska · 473 days ago · 70 km deep · 90 km away
  14. 3.1139 km WSW of Nikolski, Alaska · 471 days ago · 61 km deep · 74 km away
  15. 3.2150 km ESE of Atka, Alaska · 464 days ago · 26 km deep · 38 km away
  16. 2.9145 km ESE of Atka, Alaska · 464 days ago · 35 km deep · 44 km away
  17. 3.4193 km WSW of Nikolski, Alaska · 464 days ago · 70 km deep · 23 km away
  18. 2.8216 km SW of Nikolski, Alaska · 457 days ago · 24 km deep · 57 km away
  19. 2.8121 km E of Atka, Alaska · 457 days ago · 10 km deep · 83 km away
  20. 2.9109 km E of Atka, Alaska · 456 days ago · 10 km deep · 77 km away
  21. 3.3175 km WSW of Nikolski, Alaska · 456 days ago · 35 km deep · 37 km away
  22. 3.2192 km SW of Nikolski, Alaska · 455 days ago · 35 km deep · 24 km away
  23. 2.9121 km E of Atka, Alaska · 453 days ago · 35 km deep · 65 km away

Before

  1. 3.1174 km ESE of Atka, Alaska · 518 days ago · 35 km deep · 14 km away
  2. 3.7192 km ESE of Atka, Alaska · 528 days ago · 37 km deep · 30 km away
  3. 3.1177 km ESE of Atka, Alaska · 528 days ago · 35 km deep · 15 km away
  4. 3.2178 km E of Atka, Alaska · 530 days ago · 35 km deep · 37 km away
  5. 3.6149 km W of Nikolski, Alaska · 531 days ago · 116 km deep · 94 km away
  6. 3.5171 km E of Atka, Alaska · 535 days ago · 80 km deep · 37 km away
  7. 3.4131 km WSW of Nikolski, Alaska · 535 days ago · 35 km deep · 82 km away
  8. 2.7151 km WSW of Nikolski, Alaska · 536 days ago · 74 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000pyu7 (also filed as ak0255xoy8uv). Read Fri, Oct 2, 2026, 3:42 PM UTC.