Alaska earthquakes

M2.6 earthquake 171 km S of Atka, Alaska

A magnitude 2.6 earthquake struck 171 km S of Atka, Alaska on Wed, Dec 17, 2025, 11:36 AM HAST (21:36 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.8 118 km SSW 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
2.6 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-12-17 21:36:28 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.657° N, 173.983° 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
2.6ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.148 · 6 stations
3.0ML, local (Richter)Alaska Earthquake CenterReviewed · ±0.3 · 11 stations

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 7.2 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
298°, poorly surrounded by stations
Stations used
12

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.9154 km S of Atka, Alaska · 288 days ago · 10 km deep · 23 km away
  2. 2.494 km S of Atka, Alaska · 287 days ago · 2 km deep · 85 km away
  3. 2.9210 km S of Atka, Alaska · 286 days ago · 10 km deep · 43 km away
  4. 2.872 km S of Atka, Alaska · 283 days ago · 35 km deep · 99 km away
  5. 2.6115 km SSW of Atka, Alaska · 282 days ago · 10 km deep · 90 km away
  6. 4.8118 km SSW of Atka, Alaska · 282 days ago · 10 km deep · 90 km away
  7. 4.0113 km SSW of Atka, Alaska · 282 days ago · 10 km deep · 88 km away
  8. 3.7114 km SSW of Atka, Alaska · 282 days ago · 10 km deep · 90 km away
  9. 3.2190 km SE of Adak, Alaska · 280 days ago · 32 km deep · 74 km away
  10. 3.3201 km S of Atka, Alaska · 275 days ago · 0 km deep · 32 km away
  11. 2.9132 km SSW of Atka, Alaska · 275 days ago · 6 km deep · 91 km away
  12. 2.9128 km SSW of Atka, Alaska · 274 days ago · 7 km deep · 87 km away
  13. 3.0133 km SSW of Atka, Alaska · 273 days ago · 5 km deep · 83 km away
  14. 2.8179 km SE of Adak, Alaska · 258 days ago · 10 km deep · 74 km away
  15. 3.2191 km SSE of Adak, Alaska · 258 days ago · 20 km deep · 97 km away
  16. 2.7128 km S of Atka, Alaska · 245 days ago · 10 km deep · 45 km away
  17. 2.5116 km SSW of Atka, Alaska · 244 days ago · 10 km deep · 98 km away
  18. 3.7148 km SE of Atka, Alaska · 234 days ago · 10 km deep · 89 km away

Before

  1. 2.6236 km S of Atka, Alaska · 289 days ago · 15 km deep · 78 km away
  2. 3.4242 km S of Atka, Alaska · 292 days ago · 10 km deep · 81 km away
  3. 2.3149 km S of Atka, Alaska · 296 days ago · 10 km deep · 23 km away
  4. 2.480 km S of Atka, Alaska · 309 days ago · 11 km deep · 91 km away
  5. 3.8175 km SSE of Atka, Alaska · 314 days ago · 10 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000s8wq (also filed as ak2025yuddua). Read Fri, Oct 2, 2026, 3:12 PM UTC.