Alaska earthquakes

M4.2 earthquake 271 km W of Adak, Alaska

A magnitude 4.2 earthquake struck 271 km W of Adak, Alaska on Mon, Jan 9, 2023, 1:23 AM GMT+12 (13:23 UTC), 190 km (118 mi) below the surface.

A larger quake followed: M4.4 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
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-01-08 13:23:29 UTC
Depth
189.6 km (117.8 mi), intermediate-depth
Epicenter
52.020° N, 179.425° 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
4.2mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.132 · 16 stations
3.2ML, 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 8.3 km horizontally, 3.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
117°
Stations used
30

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 102 in the 30 days before it.

After

  1. 2.7241 km W of Adak, Alaska · 1362 days ago · 151 km deep · 31 km away
  2. 2.6Rat Islands, Aleutian Islands, Alaska · 1362 days ago · 10 km deep · 55 km away
  3. 3.2Rat Islands, Aleutian Islands, Alaska · 1361 days ago · 168 km deep · 73 km away
  4. 2.5Andreanof Islands, Aleutian Islands, Alaska · 1358 days ago · 138 km deep · 59 km away
  5. 3.4342 km W of Adak, Alaska · 1357 days ago · 113 km deep · 74 km away
  6. 3.8Rat Islands, Aleutian Islands, Alaska · 1356 days ago · 80 km deep · 69 km away
  7. 3.2260 km WSW of Adak, Alaska · 1356 days ago · 56 km deep · 75 km away
  8. 4.1Rat Islands, Aleutian Islands, Alaska · 1356 days ago · 116 km deep · 87 km away
  9. 2.7Rat Islands, Aleutian Islands, Alaska · 1355 days ago · 72 km deep · 72 km away
  10. 2.7Rat Islands, Aleutian Islands, Alaska · 1355 days ago · 70 km deep · 65 km away
  11. 3.7Rat Islands, Aleutian Islands, Alaska · 1353 days ago · 116 km deep · 84 km away
  12. 3.6Rat Islands, Aleutian Islands, Alaska · 1353 days ago · 111 km deep · 60 km away
  13. 2.1242 km WSW of Adak, Alaska · 1353 days ago · 9 km deep · 83 km away
  14. 2.6Andreanof Islands, Aleutian Islands, Alaska · 1352 days ago · 85 km deep · 85 km away
  15. 3.1193 km W of Adak, Alaska · 1346 days ago · 99 km deep · 84 km away
  16. 2.8234 km W of Adak, Alaska · 1345 days ago · 10 km deep · 51 km away
  17. 3.2Rat Islands, Aleutian Islands, Alaska · 1344 days ago · 74 km deep · 79 km away
  18. 2.1253 km WSW of Adak, Alaska · 1341 days ago · 13 km deep · 80 km away
  19. 3.1Rat Islands, Aleutian Islands, Alaska · 1341 days ago · 120 km deep · 65 km away
  20. 3.4Rat Islands, Aleutian Islands, Alaska · 1341 days ago · 76 km deep · 70 km away
  21. 2.1249 km WSW of Adak, Alaska · 1340 days ago · 5 km deep · 65 km away
  22. 2.8Rat Islands, Aleutian Islands, Alaska · 1339 days ago · 77 km deep · 68 km away
  23. 3.1274 km WSW of Adak, Alaska · 1338 days ago · 65 km deep · 64 km away
  24. 3.3212 km W of Adak, Alaska · 1337 days ago · 122 km deep · 59 km away
  25. 2.8Rat Islands, Aleutian Islands, Alaska · 1337 days ago · 38 km deep · 86 km away
  26. 2.0261 km W of Adak, Alaska · 1333 days ago · 3 km deep · 13 km away
  27. 2.4177 km W of Adak, Alaska · 1333 days ago · 88 km deep · 98 km away
  28. 2.5200 km WSW of Adak, Alaska · 1332 days ago · 71 km deep · 93 km away
  29. 2.8Rat Islands, Aleutian Islands, Alaska · 1332 days ago · 35 km deep · 100 km away
  30. 3.4218 km W of Adak, Alaska · 1332 days ago · 91 km deep · 62 km away
  31. 4.4Rat Islands, Aleutian Islands, Alaska · 1330 days ago · 63 km deep · 91 km away
  32. 3.2Rat Islands, Aleutian Islands, Alaska · 1329 days ago · 75 km deep · 67 km away
  33. 2.4203 km WSW of Adak, Alaska · 1323 days ago · 49 km deep · 93 km away
  34. 2.5188 km W of Adak, Alaska · 1321 days ago · 91 km deep · 94 km away
  35. 3.9Rat Islands, Aleutian Islands, Alaska · 1321 days ago · 156 km deep · 92 km away
  36. 3.3299 km WSW of Adak, Alaska · 1318 days ago · 38 km deep · 82 km away
  37. 2.6Rat Islands, Aleutian Islands, Alaska · 1317 days ago · 67 km deep · 61 km away
  38. 4.2Rat Islands, Aleutian Islands, Alaska · 1317 days ago · 109 km deep · 85 km away
  39. 2.7258 km WSW of Adak, Alaska · 1317 days ago · 29 km deep · 92 km away
  40. 2.9Rat Islands, Aleutian Islands, Alaska · 1315 days ago · 73 km deep · 69 km away
  41. 3.0229 km WSW of Adak, Alaska · 1312 days ago · 72 km deep · 74 km away
  42. 2.6Rat Islands, Aleutian Islands, Alaska · 1310 days ago · 33 km deep · 91 km away
  43. 3.5Rat Islands, Aleutian Islands, Alaska · 1310 days ago · 35 km deep · 78 km away
  44. 2.6278 km WSW of Adak, Alaska · 1310 days ago · 27 km deep · 66 km away
  45. 4.2Rat Islands, Aleutian Islands, Alaska · 1309 days ago · 77 km deep · 67 km away
  46. 3.3Rat Islands, Aleutian Islands, Alaska · 1307 days ago · 110 km deep · 79 km away
  47. 3.7Rat Islands, Aleutian Islands, Alaska · 1307 days ago · 129 km deep · 76 km away
  48. 2.9293 km W of Adak, Alaska · 1306 days ago · 57 km deep · 53 km away
  49. 3.6295 km W of Adak, Alaska · 1306 days ago · 77 km deep · 62 km away
  50. 3.2Rat Islands, Aleutian Islands, Alaska · 1306 days ago · 109 km deep · 47 km away
  51. 2.7202 km W of Adak, Alaska · 1305 days ago · 96 km deep · 77 km away
  52. 2.2201 km W of Adak, Alaska · 1305 days ago · 82 km deep · 71 km away
  53. 2.2Rat Islands, Aleutian Islands, Alaska · 1304 days ago · 94 km deep · 42 km away

Before

  1. 2.6Rat Islands, Aleutian Islands, Alaska · 1364 days ago · 71 km deep · 72 km away
  2. 2.8Rat Islands, Aleutian Islands, Alaska · 1365 days ago · 72 km deep · 66 km away
  3. 2.7315 km W of Adak, Alaska · 1365 days ago · 74 km deep · 59 km away
  4. 3.2Rat Islands, Aleutian Islands, Alaska · 1367 days ago · 54 km deep · 96 km away
  5. 2.8Rat Islands, Aleutian Islands, Alaska · 1367 days ago · 74 km deep · 66 km away
  6. 2.3212 km W of Adak, Alaska · 1368 days ago · 94 km deep · 60 km away
  7. 2.8325 km W of Adak, Alaska · 1368 days ago · 69 km deep · 70 km away
  8. 2.8267 km WSW of Adak, Alaska · 1368 days ago · 56 km deep · 71 km away
  9. 2.5200 km W of Adak, Alaska · 1369 days ago · 146 km deep · 76 km away
  10. 2.2Rat Islands, Aleutian Islands, Alaska · 1369 days ago · 68 km deep · 63 km away
  11. 2.9Rat Islands, Aleutian Islands, Alaska · 1369 days ago · 75 km deep · 70 km away
  12. 3.1Rat Islands, Aleutian Islands, Alaska · 1371 days ago · 83 km deep · 62 km away
  13. 3.0Rat Islands, Aleutian Islands, Alaska · 1372 days ago · 71 km deep · 68 km away
  14. 3.1Rat Islands, Aleutian Islands, Alaska · 1373 days ago · 75 km deep · 64 km away
  15. 3.0Rat Islands, Aleutian Islands, Alaska · 1373 days ago · 67 km deep · 80 km away
  16. 2.9Rat Islands, Aleutian Islands, Alaska · 1373 days ago · 70 km deep · 62 km away
  17. 3.1Rat Islands, Aleutian Islands, Alaska · 1373 days ago · 99 km deep · 63 km away
  18. 2.4228 km WSW of Adak, Alaska · 1378 days ago · 13 km deep · 74 km away
  19. 3.9Rat Islands, Aleutian Islands, Alaska · 1379 days ago · 110 km deep · 68 km away
  20. 3.3Rat Islands, Aleutian Islands, Alaska · 1379 days ago · 81 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000j58c (also filed as ak023dg6ekq). Read Sat, Oct 3, 2026, 10:08 AM UTC.