Alaska earthquakes

M3.6 earthquake 119 km S of Atka, Alaska

A magnitude 3.6 earthquake struck 119 km S of Atka, Alaska on Thu, Oct 20, 2022, 7:33 AM HADT (16:33 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.8 93 km ESE 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
3.6 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2022-10-20 16:33:38 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.125° N, 174.261° 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
3.6ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.097 · 14 stations
3.0ML, 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 2.4 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
218°, poorly surrounded by stations
Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: 146 in the 60 days after this one and 34 in the 30 days before it.

After

  1. 4.7Andreanof Islands, Aleutian Islands, Alaska · 1442 days ago · 18 km deep · 28 km away · felt by 1
  2. 1.688 km SW of Atka, Alaska · 1441 days ago · 43 km deep · 83 km away
  3. 1.986 km SSW of Atka, Alaska · 1441 days ago · 4 km deep · 54 km away
  4. 1.840 km S of Atka, Alaska · 1441 days ago · 29 km deep · 80 km away
  5. 1.590 km SW of Atka, Alaska · 1441 days ago · 13 km deep · 74 km away
  6. 1.686 km SSW of Atka, Alaska · 1440 days ago · 20 km deep · 37 km away
  7. 2.579 km SSW of Atka, Alaska · 1440 days ago · 35 km deep · 61 km away
  8. 2.2194 km S of Atka, Alaska · 1440 days ago · 14 km deep · 76 km away
  9. 1.854 km SSW of Atka, Alaska · 1440 days ago · 18 km deep · 69 km away
  10. 1.855 km SSW of Atka, Alaska · 1440 days ago · 20 km deep · 66 km away
  11. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1440 days ago · 26 km deep · 78 km away
  12. 2.977 km SSW of Atka, Alaska · 1440 days ago · 35 km deep · 48 km away
  13. 1.982 km S of Atka, Alaska · 1440 days ago · 20 km deep · 39 km away
  14. 3.4Andreanof Islands, Aleutian Islands, Alaska · 1439 days ago · 35 km deep · 36 km away
  15. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1435 days ago · 41 km deep · 39 km away
  16. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1435 days ago · 35 km deep · 18 km away
  17. 2.7105 km S of Atka, Alaska · 1435 days ago · 35 km deep · 14 km away
  18. 1.883 km SW of Atka, Alaska · 1435 days ago · 26 km deep · 73 km away
  19. 4.2106 km S of Atka, Alaska · 1434 days ago · 39 km deep · 12 km away
  20. 4.199 km S of Atka, Alaska · 1434 days ago · 35 km deep · 20 km away
  21. 3.2102 km S of Atka, Alaska · 1434 days ago · 10 km deep · 18 km away
  22. 4.085 km S of Atka, Alaska · 1434 days ago · 46 km deep · 35 km away
  23. 4.0Andreanof Islands, Aleutian Islands, Alaska · 1434 days ago · 42 km deep · 30 km away
  24. 2.9Andreanof Islands, Aleutian Islands, Alaska · 1434 days ago · 53 km deep · 59 km away
  25. 3.997 km S of Atka, Alaska · 1433 days ago · 41 km deep · 21 km away
  26. 3.985 km S of Atka, Alaska · 1433 days ago · 44 km deep · 35 km away
  27. 3.8107 km S of Atka, Alaska · 1433 days ago · 35 km deep · 13 km away
  28. 4.791 km S of Atka, Alaska · 1433 days ago · 40 km deep · 29 km away
  29. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1433 days ago · 35 km deep · 9 km away
  30. 3.1Andreanof Islands, Aleutian Islands, Alaska · 1433 days ago · 35 km deep · 12 km away
  31. 3.3100 km S of Atka, Alaska · 1433 days ago · 35 km deep · 20 km away
  32. 2.3101 km S of Atka, Alaska · 1433 days ago · 11 km deep · 18 km away
  33. 3.296 km S of Atka, Alaska · 1433 days ago · 13 km deep · 24 km away
  34. 3.5110 km S of Atka, Alaska · 1433 days ago · 35 km deep · 11 km away
  35. 2.376 km SSE of Atka, Alaska · 1433 days ago · 11 km deep · 54 km away
  36. 2.594 km S of Atka, Alaska · 1433 days ago · 16 km deep · 26 km away
  37. 4.092 km S of Atka, Alaska · 1433 days ago · 42 km deep · 27 km away
  38. 4.291 km S of Atka, Alaska · 1433 days ago · 41 km deep · 28 km away · felt by 1
  39. 2.288 km SSW of Atka, Alaska · 1433 days ago · 15 km deep · 36 km away
  40. 3.1101 km S of Atka, Alaska · 1433 days ago · 19 km deep · 18 km away
  41. 2.9105 km S of Atka, Alaska · 1433 days ago · 35 km deep · 14 km away
  42. 4.188 km S of Atka, Alaska · 1433 days ago · 40 km deep · 32 km away
  43. 4.5108 km S of Atka, Alaska · 1433 days ago · 19 km deep · 11 km away
  44. 4.7Andreanof Islands, Aleutian Islands, Alaska · 1433 days ago · 14 km deep · 10 km away
  45. 4.3103 km S of Atka, Alaska · 1433 days ago · 10 km deep · 16 km away
  46. 2.7Andreanof Islands, Aleutian Islands, Alaska · 1433 days ago · 10 km deep · 18 km away
  47. 3.398 km S of Atka, Alaska · 1433 days ago · 10 km deep · 21 km away
  48. 2.7105 km S of Atka, Alaska · 1433 days ago · 10 km deep · 15 km away
  49. 3.8Andreanof Islands, Aleutian Islands, Alaska · 1433 days ago · 10 km deep · 18 km away
  50. 3.8110 km S of Atka, Alaska · 1433 days ago · 10 km deep · 10 km away
  51. 2.196 km SSW of Atka, Alaska · 1433 days ago · 5 km deep · 32 km away
  52. 3.193 km S of Atka, Alaska · 1433 days ago · 17 km deep · 27 km away
  53. 2.7105 km S of Atka, Alaska · 1433 days ago · 35 km deep · 16 km away
  54. 2.5154 km S of Atka, Alaska · 1433 days ago · 10 km deep · 43 km away
  55. 2.395 km S of Atka, Alaska · 1433 days ago · 10 km deep · 26 km away
  56. 2.2108 km S of Atka, Alaska · 1433 days ago · 26 km deep · 13 km away
  57. 3.3Andreanof Islands, Aleutian Islands, Alaska · 1433 days ago · 10 km deep · 16 km away
  58. 2.2107 km S of Atka, Alaska · 1433 days ago · 22 km deep · 14 km away
  59. 2.6Andreanof Islands, Aleutian Islands, Alaska · 1433 days ago · 12 km deep · 13 km away
  60. 3.3Andreanof Islands, Aleutian Islands, Alaska · 1433 days ago · 15 km deep · 29 km away

The first 60 of 146.

Before

  1. 2.0104 km ESE of Adak, Alaska · 1444 days ago · 26 km deep · 80 km away
  2. 2.142 km SSW of Atka, Alaska · 1448 days ago · 57 km deep · 79 km away
  3. 2.6131 km SSE of Atka, Alaska · 1449 days ago · 35 km deep · 79 km away
  4. 1.948 km S of Atka, Alaska · 1449 days ago · 44 km deep · 71 km away
  5. 1.9101 km ESE of Adak, Alaska · 1449 days ago · 25 km deep · 84 km away
  6. 1.636 km SSW of Atka, Alaska · 1451 days ago · 59 km deep · 88 km away
  7. 1.772 km SW of Atka, Alaska · 1451 days ago · 26 km deep · 76 km away
  8. 2.2201 km SE of Adak, Alaska · 1452 days ago · 35 km deep · 88 km away
  9. 1.954 km SSW of Atka, Alaska · 1453 days ago · 16 km deep · 77 km away
  10. 2.072 km SSE of Atka, Alaska · 1453 days ago · 21 km deep · 63 km away
  11. 1.963 km SSE of Atka, Alaska · 1454 days ago · 39 km deep · 67 km away
  12. 2.051 km S of Atka, Alaska · 1454 days ago · 25 km deep · 68 km away
  13. 2.850 km SSE of Atka, Alaska · 1455 days ago · 35 km deep · 81 km away
  14. 3.248 km SSE of Atka, Alaska · 1455 days ago · 35 km deep · 81 km away
  15. 1.758 km SSW of Atka, Alaska · 1455 days ago · 49 km deep · 72 km away
  16. 1.736 km SE of Atka, Alaska · 1456 days ago · 61 km deep · 100 km away
  17. 1.872 km SW of Atka, Alaska · 1457 days ago · 43 km deep · 86 km away
  18. 2.639 km S of Atka, Alaska · 1457 days ago · 17 km deep · 81 km away
  19. 2.7188 km SSE of Adak, Alaska · 1457 days ago · 35 km deep · 96 km away
  20. 3.059 km S of Atka, Alaska · 1459 days ago · 35 km deep · 61 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000indn (also filed as ak022dgu6s9q). Read Thu, Oct 1, 2026, 7:43 PM UTC.