Alaska earthquakes

M3.3 earthquake 220 km W of Adak, Alaska

A magnitude 3.3 earthquake struck 220 km W of Adak, Alaska on Fri, Dec 19, 2025, 2:50 AM HAST (12:50 UTC), 106 km (66 mi) below the surface.

A larger quake followed: M4.0 132 km W of Adak, 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
3.3 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-12-19 12:50:55 UTC
Depth
106.3 km (66.1 mi), intermediate-depth
Epicenter
51.746° N, 179.823° 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
3.3ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.085 · 18 stations
3.2ML, local (Richter)Alaska Earthquake CenterReviewed · ±0.3 · 25 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 6.0 km horizontally, 2.7 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
129°
Stations used
26

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 34 in the 30 days before it.

After

  1. 3.3263 km W of Adak, Alaska · 286 days ago · 193 km deep · 49 km away
  2. 1.6255 km W of Adak, Alaska · 285 days ago · 4 km deep · 36 km away
  3. 2.8181 km WSW of Adak, Alaska · 283 days ago · 76 km deep · 53 km away
  4. 3.8211 km WSW of Adak, Alaska · 283 days ago · 37 km deep · 78 km away
  5. 2.9214 km WSW of Adak, Alaska · 283 days ago · 13 km deep · 79 km away
  6. 3.2262 km W of Adak, Alaska · 282 days ago · 77 km deep · 42 km away
  7. 1.6168 km W of Adak, Alaska · 281 days ago · 14 km deep · 52 km away
  8. 2.8277 km W of Adak, Alaska · 281 days ago · 67 km deep · 59 km away
  9. 3.1291 km WSW of Adak, Alaska · 276 days ago · 41 km deep · 79 km away
  10. 2.6150 km WSW of Adak, Alaska · 272 days ago · 4 km deep · 89 km away
  11. 1.5250 km W of Adak, Alaska · 271 days ago · 5 km deep · 43 km away
  12. 3.6147 km WSW of Adak, Alaska · 264 days ago · 80 km deep · 77 km away
  13. 3.3233 km WSW of Adak, Alaska · 263 days ago · 35 km deep · 68 km away
  14. 2.9233 km W of Adak, Alaska · 262 days ago · 95 km deep · 14 km away
  15. 2.7134 km WSW of Adak, Alaska · 260 days ago · 88 km deep · 89 km away
  16. 3.5157 km WSW of Adak, Alaska · 259 days ago · 16 km deep · 82 km away
  17. 3.1239 km WSW of Adak, Alaska · 255 days ago · 14 km deep · 78 km away
  18. 2.8233 km WSW of Adak, Alaska · 254 days ago · 18 km deep · 45 km away
  19. 3.5299 km WSW of Adak, Alaska · 250 days ago · 26 km deep · 83 km away
  20. 2.9133 km W of Adak, Alaska · 249 days ago · 182 km deep · 91 km away
  21. 3.4205 km W of Adak, Alaska · 249 days ago · 94 km deep · 16 km away
  22. 3.0240 km WSW of Adak, Alaska · 244 days ago · 10 km deep · 85 km away
  23. 3.6265 km W of Adak, Alaska · 244 days ago · 80 km deep · 46 km away
  24. 3.9295 km W of Adak, Alaska · 243 days ago · 176 km deep · 98 km away
  25. 3.3283 km WSW of Adak, Alaska · 243 days ago · 35 km deep · 71 km away
  26. 2.1123 km W of Adak, Alaska · 242 days ago · 14 km deep · 98 km away
  27. 3.0283 km WSW of Adak, Alaska · 241 days ago · 35 km deep · 85 km away
  28. 2.9269 km W of Adak, Alaska · 240 days ago · 108 km deep · 50 km away
  29. 2.8186 km W of Adak, Alaska · 238 days ago · 141 km deep · 35 km away
  30. 4.0132 km W of Adak, Alaska · 233 days ago · 110 km deep · 88 km away
  31. 3.3Rat Islands, Aleutian Islands, Alaska · 229 days ago · 99 km deep · 88 km away
  32. 3.1181 km WSW of Adak, Alaska · 229 days ago · 10 km deep · 76 km away
  33. 2.8223 km WSW of Adak, Alaska · 229 days ago · 60 km deep · 35 km away

Before

  1. 2.6261 km W of Adak, Alaska · 288 days ago · 92 km deep · 42 km away
  2. 2.6252 km WSW of Adak, Alaska · 288 days ago · 35 km deep · 70 km away
  3. 2.5213 km WSW of Adak, Alaska · 289 days ago · 24 km deep · 76 km away
  4. 2.9206 km WSW of Adak, Alaska · 290 days ago · 35 km deep · 68 km away
  5. 2.4172 km W of Adak, Alaska · 290 days ago · 130 km deep · 47 km away
  6. 2.5228 km WSW of Adak, Alaska · 290 days ago · 66 km deep · 33 km away
  7. 3.1125 km W of Adak, Alaska · 291 days ago · 129 km deep · 94 km away
  8. 3.1219 km WSW of Adak, Alaska · 293 days ago · 35 km deep · 66 km away
  9. 1.9269 km W of Adak, Alaska · 295 days ago · 8 km deep · 50 km away
  10. 2.1263 km W of Adak, Alaska · 295 days ago · 11 km deep · 45 km away
  11. 3.1165 km WSW of Adak, Alaska · 296 days ago · 31 km deep · 92 km away
  12. 2.4166 km W of Adak, Alaska · 296 days ago · 5 km deep · 55 km away
  13. 1.6263 km W of Adak, Alaska · 296 days ago · 3 km deep · 44 km away
  14. 2.6228 km WSW of Adak, Alaska · 297 days ago · 10 km deep · 75 km away
  15. 1.5261 km W of Adak, Alaska · 297 days ago · 16 km deep · 46 km away
  16. 2.0133 km WSW of Adak, Alaska · 298 days ago · 12 km deep · 99 km away
  17. 2.1252 km W of Adak, Alaska · 298 days ago · 4 km deep · 37 km away
  18. 1.8261 km W of Adak, Alaska · 299 days ago · 4 km deep · 46 km away
  19. 4.3266 km W of Adak, Alaska · 299 days ago · 171 km deep · 65 km away
  20. 3.2269 km WSW of Adak, Alaska · 299 days ago · 52 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000s9bc (also filed as ak2025yxdecw). Read Fri, Oct 2, 2026, 4:32 PM UTC.