Alaska earthquakes

M4.0 earthquake 87 km SSE of Atka, Alaska

A magnitude 4.0 earthquake struck 87 km SSE of Atka, Alaska on Mon, Sep 19, 2022, 12:43 PM HADT (21:43 UTC), 38 km (24 mi) below the surface.

A larger quake followed: M4.7 Andreanof 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
4.0 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2022-09-19 21:43:34 UTC
Depth
37.9 km (23.6 mi), shallow
Epicenter
51.529° N, 173.538° 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
4.0mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.071 · 53 stations
3.6ML, 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 6.8 km horizontally, 7.4 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
137°
Stations used
45

Nearby

Within 100 km, magnitude 1.5 and up: 140 in the 60 days after this one and 53 in the 30 days before it.

After

  1. 3.068 km E of Atka, Alaska · 1472 days ago · 11 km deep · 78 km away
  2. 3.269 km SSE of Atka, Alaska · 1471 days ago · 35 km deep · 19 km away
  3. 2.157 km SSW of Atka, Alaska · 1471 days ago · 23 km deep · 69 km away
  4. 2.7143 km S of Atka, Alaska · 1469 days ago · 10 km deep · 70 km away
  5. 2.956 km S of Atka, Alaska · 1467 days ago · 35 km deep · 49 km away
  6. 2.054 km SSW of Atka, Alaska · 1467 days ago · 42 km deep · 79 km away
  7. 1.679 km SSW of Atka, Alaska · 1467 days ago · 13 km deep · 80 km away
  8. 3.2Andreanof Islands, Aleutian Islands, Alaska · 1466 days ago · 29 km deep · 34 km away
  9. 2.5131 km S of Atka, Alaska · 1466 days ago · 10 km deep · 60 km away
  10. 2.3146 km S of Atka, Alaska · 1465 days ago · 10 km deep · 89 km away
  11. 2.043 km SW of Atka, Alaska · 1465 days ago · 85 km deep · 89 km away
  12. 2.059 km SW of Atka, Alaska · 1464 days ago · 69 km deep · 100 km away
  13. 3.19 km SSW of Atka, Alaska · 1460 days ago · 170 km deep · 82 km away
  14. 3.074 km SSW of Atka, Alaska · 1460 days ago · 35 km deep · 79 km away
  15. 3.059 km S of Atka, Alaska · 1458 days ago · 35 km deep · 58 km away
  16. 3.186 km ESE of Atka, Alaska · 1457 days ago · 35 km deep · 54 km away
  17. 2.639 km S of Atka, Alaska · 1457 days ago · 17 km deep · 53 km away
  18. 1.736 km SE of Atka, Alaska · 1456 days ago · 61 km deep · 53 km away
  19. 2.211 km NE of Atka, Alaska · 1456 days ago · 160 km deep · 91 km away
  20. 1.856 km ESE of Atka, Alaska · 1456 days ago · 63 km deep · 48 km away
  21. 2.126 km E of Atka, Alaska · 1456 days ago · 129 km deep · 72 km away
  22. 1.758 km SSW of Atka, Alaska · 1455 days ago · 49 km deep · 77 km away
  23. 3.248 km SSE of Atka, Alaska · 1455 days ago · 35 km deep · 39 km away
  24. 1.762 km E of Atka, Alaska · 1455 days ago · 101 km deep · 67 km away
  25. 2.850 km SSE of Atka, Alaska · 1455 days ago · 35 km deep · 37 km away
  26. 2.051 km S of Atka, Alaska · 1454 days ago · 25 km deep · 49 km away
  27. 1.963 km SSE of Atka, Alaska · 1454 days ago · 39 km deep · 27 km away
  28. 2.072 km SSE of Atka, Alaska · 1453 days ago · 21 km deep · 19 km away
  29. 1.954 km SSW of Atka, Alaska · 1453 days ago · 16 km deep · 80 km away
  30. 1.772 km SW of Atka, Alaska · 1450 days ago · 26 km deep · 94 km away
  31. 1.636 km SSW of Atka, Alaska · 1450 days ago · 59 km deep · 76 km away
  32. 2.166 km ENE of Atka, Alaska · 1449 days ago · 8 km deep · 90 km away
  33. 1.948 km S of Atka, Alaska · 1449 days ago · 44 km deep · 52 km away
  34. 2.134 km ENE of Atka, Alaska · 1449 days ago · 6 km deep · 82 km away
  35. 2.6131 km SSE of Atka, Alaska · 1449 days ago · 35 km deep · 45 km away
  36. 2.142 km SSW of Atka, Alaska · 1448 days ago · 57 km deep · 67 km away
  37. 2.692 km SE of Atka, Alaska · 1447 days ago · 35 km deep · 36 km away
  38. 1.942 km E of Atka, Alaska · 1446 days ago · 13 km deep · 78 km away
  39. 1.911 km SSW of Atka, Alaska · 1443 days ago · 10 km deep · 81 km away
  40. 3.6119 km S of Atka, Alaska · 1442 days ago · 10 km deep · 67 km away
  41. 4.7Andreanof Islands, Aleutian Islands, Alaska · 1441 days ago · 18 km deep · 63 km away · felt by 1
  42. 1.986 km SSW of Atka, Alaska · 1441 days ago · 4 km deep · 85 km away
  43. 1.840 km S of Atka, Alaska · 1441 days ago · 29 km deep · 52 km away
  44. 2.847 km ESE of Atka, Alaska · 1440 days ago · 10 km deep · 57 km away
  45. 1.686 km SSW of Atka, Alaska · 1440 days ago · 20 km deep · 65 km away
  46. 2.579 km SSW of Atka, Alaska · 1440 days ago · 35 km deep · 85 km away
  47. 3.234 km ESE of Atka, Alaska · 1439 days ago · 187 km deep · 67 km away
  48. 1.854 km SSW of Atka, Alaska · 1439 days ago · 18 km deep · 68 km away
  49. 1.855 km SSW of Atka, Alaska · 1439 days ago · 20 km deep · 63 km away
  50. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1439 days ago · 26 km deep · 70 km away
  51. 2.977 km SSW of Atka, Alaska · 1439 days ago · 35 km deep · 67 km away
  52. 1.982 km S of Atka, Alaska · 1439 days ago · 20 km deep · 60 km away
  53. 3.4Andreanof Islands, Aleutian Islands, Alaska · 1439 days ago · 35 km deep · 62 km away
  54. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1435 days ago · 41 km deep · 56 km away
  55. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1435 days ago · 35 km deep · 55 km away
  56. 2.7105 km S of Atka, Alaska · 1435 days ago · 35 km deep · 58 km away
  57. 1.883 km SW of Atka, Alaska · 1434 days ago · 26 km deep · 99 km away
  58. 4.2106 km S of Atka, Alaska · 1434 days ago · 39 km deep · 60 km away
  59. 4.199 km S of Atka, Alaska · 1433 days ago · 35 km deep · 59 km away
  60. 3.2102 km S of Atka, Alaska · 1433 days ago · 10 km deep · 60 km away

The first 60 of 140.

Before

  1. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1476 days ago · 8 km deep · 93 km away
  2. 3.653 km E of Atka, Alaska · 1477 days ago · 9 km deep · 85 km away
  3. 3.781 km SSE of Atka, Alaska · 1477 days ago · 45 km deep · 6 km away
  4. 3.5Andreanof Islands, Aleutian Islands, Alaska · 1477 days ago · 35 km deep · 80 km away
  5. 3.170 km SW of Atka, Alaska · 1477 days ago · 55 km deep · 97 km away
  6. 1.740 km ENE of Atka, Alaska · 1478 days ago · 4 km deep · 90 km away
  7. 2.155 km ENE of Atka, Alaska · 1478 days ago · 5 km deep · 90 km away
  8. 1.934 km S of Atka, Alaska · 1478 days ago · 61 km deep · 64 km away
  9. 2.488 km E of Atka, Alaska · 1479 days ago · 150 km deep · 85 km away
  10. 2.7144 km SE of Atka, Alaska · 1479 days ago · 10 km deep · 61 km away
  11. 2.649 km S of Atka, Alaska · 1479 days ago · 70 km deep · 61 km away
  12. 3.3169 km SE of Atka, Alaska · 1481 days ago · 35 km deep · 95 km away
  13. 2.313 km SSW of Atka, Alaska · 1482 days ago · 100 km deep · 79 km away
  14. 2.318 km WSW of Atka, Alaska · 1482 days ago · 165 km deep · 91 km away
  15. 3.4Andreanof Islands, Aleutian Islands, Alaska · 1483 days ago · 35 km deep · 58 km away
  16. 1.832 km SE of Atka, Alaska · 1484 days ago · 5 km deep · 55 km away
  17. 3.0125 km ESE of Atka, Alaska · 1484 days ago · 35 km deep · 71 km away
  18. 2.4130 km S of Atka, Alaska · 1485 days ago · 9 km deep · 63 km away
  19. 1.662 km SW of Atka, Alaska · 1486 days ago · 56 km deep · 100 km away
  20. 2.961 km SW of Atka, Alaska · 1486 days ago · 70 km deep · 100 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ib5a (also filed as ak022c1nkbd2). Read Thu, Oct 1, 2026, 9:28 AM UTC.