Alaska earthquakes

M3.6 earthquake 265 km W of Adak, Alaska

A magnitude 3.6 earthquake struck 265 km W of Adak, Alaska on Sun, Feb 1, 2026, 6:28 AM GMT+12 (18:28 UTC), 80 km (50 mi) below the surface.

A larger quake followed: M4.9 Rat Islands, Aleutian Islands, 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
2026-01-31 18:28:37 UTC
Depth
80.3 km (49.9 mi), intermediate-depth
Epicenter
51.611° N, 179.539° E
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 · ±0.081 · 20 stations
3.4ML, local (Richter)Alaska Earthquake CenterReviewed · ±0.3 · 16 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 16.6 km horizontally, 13.4 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
120°
Stations used
26

Nearby

Within 100 km, magnitude 1.5 and up: 70 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 3.9295 km W of Adak, Alaska · 243 days ago · 176 km deep · 86 km away
  2. 3.3283 km WSW of Adak, Alaska · 242 days ago · 35 km deep · 30 km away
  3. 3.7Rat Islands, Aleutian Islands, Alaska · 241 days ago · 133 km deep · 100 km away
  4. 3.0283 km WSW of Adak, Alaska · 240 days ago · 35 km deep · 55 km away
  5. 4.1Rat Islands, Aleutian Islands, Alaska · 240 days ago · 69 km deep · 78 km away
  6. 2.9269 km W of Adak, Alaska · 240 days ago · 108 km deep · 20 km away
  7. 2.8186 km W of Adak, Alaska · 238 days ago · 141 km deep · 81 km away
  8. 3.9Rat Islands, Aleutian Islands, Alaska · 237 days ago · 56 km deep · 67 km away
  9. 4.9Rat Islands, Aleutian Islands, Alaska · 230 days ago · 117 km deep · 91 km away
  10. 3.5Rat Islands, Aleutian Islands, Alaska · 230 days ago · 113 km deep · 88 km away
  11. 3.3Rat Islands, Aleutian Islands, Alaska · 229 days ago · 99 km deep · 45 km away
  12. 2.8Rat Islands, Aleutian Islands, Alaska · 229 days ago · 35 km deep · 63 km away
  13. 2.8223 km WSW of Adak, Alaska · 228 days ago · 60 km deep · 50 km away
  14. 2.7224 km WSW of Adak, Alaska · 225 days ago · 35 km deep · 90 km away
  15. 3.2251 km W of Adak, Alaska · 225 days ago · 95 km deep · 19 km away
  16. 4.7225 km W of Adak, Alaska · 225 days ago · 127 km deep · 59 km away
  17. 3.5Rat Islands, Aleutian Islands, Alaska · 223 days ago · 32 km deep · 88 km away
  18. 3.8258 km WNW of Adak, Alaska · 222 days ago · 182 km deep · 89 km away
  19. 1.5259 km W of Adak, Alaska · 222 days ago · 12 km deep · 32 km away
  20. 2.1Rat Islands, Aleutian Islands, Alaska · 222 days ago · 11 km deep · 90 km away
  21. 3.9249 km WSW of Adak, Alaska · 221 days ago · 9 km deep · 90 km away
  22. 3.9Rat Islands, Aleutian Islands, Alaska · 212 days ago · 10 km deep · 97 km away
  23. 3.0247 km WSW of Adak, Alaska · 212 days ago · 8 km deep · 63 km away
  24. 4.4255 km WSW of Adak, Alaska · 211 days ago · 10 km deep · 85 km away
  25. 3.3248 km WSW of Adak, Alaska · 209 days ago · 13 km deep · 64 km away
  26. 2.5298 km WSW of Adak, Alaska · 208 days ago · 30 km deep · 68 km away
  27. 2.1Rat Islands, Aleutian Islands, Alaska · 207 days ago · 173 km deep · 93 km away
  28. 1.8271 km W of Adak, Alaska · 207 days ago · 24 km deep · 8 km away
  29. 3.0Rat Islands, Aleutian Islands, Alaska · 207 days ago · 75 km deep · 60 km away
  30. 2.2202 km W of Adak, Alaska · 207 days ago · 17 km deep · 63 km away
  31. 2.5259 km WSW of Adak, Alaska · 207 days ago · 55 km deep · 23 km away
  32. 3.1299 km W of Adak, Alaska · 207 days ago · 32 km deep · 34 km away
  33. 2.9Rat Islands, Aleutian Islands, Alaska · 204 days ago · 45 km deep · 81 km away
  34. 2.9259 km W of Adak, Alaska · 204 days ago · 79 km deep · 7 km away
  35. 2.3188 km WSW of Adak, Alaska · 204 days ago · 19 km deep · 97 km away
  36. 2.7253 km WSW of Adak, Alaska · 203 days ago · 36 km deep · 35 km away
  37. 3.5268 km W of Adak, Alaska · 203 days ago · 81 km deep · 3 km away
  38. 2.9Rat Islands, Aleutian Islands, Alaska · 203 days ago · 58 km deep · 80 km away
  39. 1.6Rat Islands, Aleutian Islands, Alaska · 202 days ago · 8 km deep · 87 km away
  40. 2.7244 km W of Adak, Alaska · 200 days ago · 180 km deep · 68 km away
  41. 2.2Rat Islands, Aleutian Islands, Alaska · 199 days ago · 49 km deep · 66 km away
  42. 2.1Rat Islands, Aleutian Islands, Alaska · 198 days ago · 96 km deep · 66 km away
  43. 3.1Rat Islands, Aleutian Islands, Alaska · 198 days ago · 92 km deep · 73 km away
  44. 4.0230 km W of Adak, Alaska · 197 days ago · 88 km deep · 35 km away
  45. 2.4212 km W of Adak, Alaska · 197 days ago · 136 km deep · 55 km away
  46. 2.3282 km W of Adak, Alaska · 197 days ago · 76 km deep · 17 km away
  47. 2.5281 km WSW of Adak, Alaska · 197 days ago · 41 km deep · 36 km away
  48. 2.0230 km WSW of Adak, Alaska · 197 days ago · 67 km deep · 44 km away
  49. 2.2203 km W of Adak, Alaska · 197 days ago · 80 km deep · 63 km away
  50. 2.3Rat Islands, Aleutian Islands, Alaska · 196 days ago · 39 km deep · 60 km away
  51. 2.1Rat Islands, Aleutian Islands, Alaska · 196 days ago · 108 km deep · 78 km away
  52. 2.1285 km WSW of Adak, Alaska · 196 days ago · 60 km deep · 28 km away
  53. 2.4251 km WSW of Adak, Alaska · 195 days ago · 10 km deep · 30 km away
  54. 3.0Rat Islands, Aleutian Islands, Alaska · 194 days ago · 65 km deep · 61 km away
  55. 2.8248 km WSW of Adak, Alaska · 194 days ago · 10 km deep · 81 km away
  56. 3.8261 km WSW of Adak, Alaska · 193 days ago · 60 km deep · 26 km away
  57. 2.6217 km WSW of Adak, Alaska · 191 days ago · 66 km deep · 52 km away
  58. 2.8225 km W of Adak, Alaska · 189 days ago · 90 km deep · 40 km away
  59. 3.8Rat Islands, Aleutian Islands, Alaska · 189 days ago · 132 km deep · 90 km away
  60. 2.5Rat Islands, Aleutian Islands, Alaska · 188 days ago · 99 km deep · 50 km away

The first 60 of 70.

Before

  1. 3.0240 km WSW of Adak, Alaska · 244 days ago · 10 km deep · 84 km away
  2. 4.0294 km WSW of Adak, Alaska · 246 days ago · 10 km deep · 92 km away
  3. 3.4205 km W of Adak, Alaska · 248 days ago · 94 km deep · 60 km away
  4. 3.2Rat Islands, Aleutian Islands, Alaska · 249 days ago · 35 km deep · 59 km away
  5. 3.5299 km WSW of Adak, Alaska · 250 days ago · 26 km deep · 38 km away
  6. 2.3Rat Islands, Aleutian Islands, Alaska · 252 days ago · 5 km deep · 90 km away
  7. 2.8233 km WSW of Adak, Alaska · 254 days ago · 18 km deep · 49 km away
  8. 3.1239 km WSW of Adak, Alaska · 254 days ago · 14 km deep · 78 km away
  9. 2.7Rat Islands, Aleutian Islands, Alaska · 258 days ago · 48 km deep · 61 km away
  10. 2.9233 km W of Adak, Alaska · 262 days ago · 95 km deep · 33 km away
  11. 3.3233 km WSW of Adak, Alaska · 262 days ago · 35 km deep · 70 km away
  12. 1.5250 km W of Adak, Alaska · 271 days ago · 5 km deep · 46 km away
  13. 3.4Rat Islands, Aleutian Islands, Alaska · 272 days ago · 10 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000s5tn (also filed as ak2026cemnta). Read Fri, Oct 2, 2026, 3:49 AM UTC.