Alaska earthquakes

M2.1 earthquake 101 km SSW of Unalaska, Alaska

A magnitude 2.1 earthquake struck 101 km SSW of Unalaska, Alaska on Thu, Apr 20, 2017, 4:20 PM AKDT (00:20 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M5.9 163 km ESE of Nikolski, Alaska. This one was a foreshock.

Unalaska forecastMore in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.1 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2017-04-21 00:20:37 UTC
Depth
25.6 km (15.9 mi), shallow
Epicenter
52.984° N, 166.889° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used
17

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 88 in the 60 days after this one and 46 in the 30 days before it.

After

  1. 1.959 km SE of Unalaska, Alaska · 3450 days ago · 47 km deep · 95 km away
  2. 2.379 km S of Unalaska, Alaska · 3448 days ago · 26 km deep · 27 km away
  3. 2.370 km SE of Unalaska, Alaska · 3448 days ago · 25 km deep · 89 km away
  4. 3.883 km S of Unalaska, Alaska · 3448 days ago · 26 km deep · 23 km away
  5. 2.478 km S of Unalaska, Alaska · 3448 days ago · 26 km deep · 26 km away
  6. 1.876 km S of Unalaska, Alaska · 3447 days ago · 22 km deep · 27 km away
  7. 1.5101 km SSW of Unalaska, Alaska · 3446 days ago · 39 km deep · 32 km away
  8. 1.770 km SW of Unalaska, Alaska · 3446 days ago · 71 km deep · 59 km away
  9. 1.858 km SSE of Unalaska, Alaska · 3444 days ago · 42 km deep · 72 km away
  10. 2.767 km SW of Unalaska, Alaska · 3444 days ago · 68 km deep · 61 km away
  11. 2.182 km S of Unalaska, Alaska · 3443 days ago · 26 km deep · 20 km away
  12. 1.550 km SSE of Unalaska, Alaska · 3442 days ago · 48 km deep · 74 km away
  13. 1.668 km SE of Unalaska, Alaska · 3441 days ago · 23 km deep · 80 km away
  14. 1.678 km E of Nikolski, Alaska · 3440 days ago · 58 km deep · 55 km away
  15. 1.955 km E of Nikolski, Alaska · 3438 days ago · 76 km deep · 78 km away
  16. 1.548 km SW of Unalaska, Alaska · 3438 days ago · 17 km deep · 67 km away
  17. 1.573 km WSW of Unalaska, Alaska · 3438 days ago · 26 km deep · 84 km away
  18. 3.585 km E of Nikolski, Alaska · 3437 days ago · 48 km deep · 49 km away
  19. 1.787 km SE of Unalaska, Alaska · 3436 days ago · 17 km deep · 91 km away
  20. 1.665 km WSW of Unalaska, Alaska · 3434 days ago · 21 km deep · 73 km away
  21. 1.733 km SSE of Unalaska, Alaska · 3432 days ago · 65 km deep · 76 km away
  22. 1.976 km SSE of Unalaska, Alaska · 3431 days ago · 19 km deep · 64 km away
  23. 1.757 km S of Unalaska, Alaska · 3429 days ago · 58 km deep · 45 km away
  24. 1.8Fox Islands, Aleutian Islands, Alaska · 3429 days ago · 13 km deep · 99 km away
  25. 4.146 km SE of Nikolski, Alaska · 3429 days ago · 37 km deep · 99 km away
  26. 1.884 km S of Unalaska, Alaska · 3428 days ago · 13 km deep · 28 km away
  27. 2.5122 km SSE of Unalaska, Alaska · 3428 days ago · 30 km deep · 78 km away
  28. 1.8113 km SSE of Unalaska, Alaska · 3428 days ago · 10 km deep · 74 km away
  29. 1.6113 km SSE of Unalaska, Alaska · 3428 days ago · 12 km deep · 75 km away
  30. 1.6110 km SSE of Unalaska, Alaska · 3428 days ago · 11 km deep · 83 km away
  31. 1.871 km SE of Unalaska, Alaska · 3428 days ago · 16 km deep · 92 km away
  32. 1.9108 km SSE of Unalaska, Alaska · 3428 days ago · 5 km deep · 77 km away
  33. 2.252 km SE of Nikolski, Alaska · 3425 days ago · 40 km deep · 100 km away
  34. 3.291 km E of Nikolski, Alaska · 3425 days ago · 51 km deep · 42 km away
  35. 2.085 km ENE of Nikolski, Alaska · 3425 days ago · 62 km deep · 52 km away
  36. 1.617 km S of Unalaska, Alaska · 3422 days ago · 98 km deep · 85 km away
  37. 2.337 km SSW of Unalaska, Alaska · 3422 days ago · 67 km deep · 64 km away
  38. 2.1100 km E of Nikolski, Alaska · 3419 days ago · 26 km deep · 33 km away
  39. 2.5101 km SE of Unalaska, Alaska · 3419 days ago · 10 km deep · 90 km away
  40. 1.736 km SSE of Unalaska, Alaska · 3418 days ago · 64 km deep · 81 km away
  41. 5.3163 km ESE of Nikolski, Alaska · 3418 days ago · 11 km deep · 75 km away
  42. 5.9163 km ESE of Nikolski, Alaska · 3418 days ago · 10 km deep · 75 km away · felt by 1 · tsunami flag
  43. 2.8155 km ESE of Nikolski, Alaska · 3418 days ago · 25 km deep · 67 km away
  44. 2.7156 km ESE of Nikolski, Alaska · 3418 days ago · 59 km deep · 73 km away
  45. 3.8170 km ESE of Nikolski, Alaska · 3417 days ago · 34 km deep · 90 km away
  46. 3.6163 km ESE of Nikolski, Alaska · 3417 days ago · 79 km deep · 77 km away
  47. 2.5165 km ESE of Nikolski, Alaska · 3417 days ago · 18 km deep · 79 km away
  48. 2.4163 km ESE of Nikolski, Alaska · 3417 days ago · 24 km deep · 80 km away
  49. 3.881 km SSW of Unalaska, Alaska · 3417 days ago · 35 km deep · 36 km away
  50. 2.1166 km ESE of Nikolski, Alaska · 3416 days ago · 14 km deep · 76 km away
  51. 2.0147 km ESE of Nikolski, Alaska · 3416 days ago · 25 km deep · 69 km away
  52. 3.492 km E of Nikolski, Alaska · 3416 days ago · 38 km deep · 43 km away
  53. 2.2154 km ESE of Nikolski, Alaska · 3416 days ago · 20 km deep · 65 km away
  54. 2.1141 km S of Unalaska, Alaska · 3415 days ago · 25 km deep · 48 km away
  55. 2.038 km SSW of Unalaska, Alaska · 3415 days ago · 73 km deep · 65 km away
  56. 1.9148 km S of Unalaska, Alaska · 3414 days ago · 5 km deep · 52 km away
  57. 2.7161 km ESE of Nikolski, Alaska · 3414 days ago · 25 km deep · 78 km away
  58. 2.5Fox Islands, Aleutian Islands, Alaska · 3414 days ago · 25 km deep · 87 km away
  59. 1.8131 km S of Unalaska, Alaska · 3413 days ago · 5 km deep · 34 km away
  60. 2.3155 km ESE of Nikolski, Alaska · 3413 days ago · 10 km deep · 59 km away

The first 60 of 88.

Before

  1. 2.6111 km ESE of Nikolski, Alaska · 3452 days ago · 35 km deep · 46 km away
  2. 2.093 km E of Nikolski, Alaska · 3452 days ago · 53 km deep · 39 km away
  3. 2.167 km ESE of Nikolski, Alaska · 3452 days ago · 26 km deep · 80 km away
  4. 2.1130 km S of Unalaska, Alaska · 3454 days ago · 9 km deep · 30 km away
  5. 2.955 km SE of Nikolski, Alaska · 3454 days ago · 32 km deep · 97 km away
  6. 3.841 km ESE of Nikolski, Alaska · 3454 days ago · 36 km deep · 96 km away
  7. 1.7101 km SSW of Unalaska, Alaska · 3455 days ago · 43 km deep · 35 km away
  8. 1.772 km WSW of Unalaska, Alaska · 3455 days ago · 14 km deep · 80 km away
  9. 1.555 km WSW of Unalaska, Alaska · 3456 days ago · 14 km deep · 72 km away
  10. 1.758 km SW of Unalaska, Alaska · 3456 days ago · 13 km deep · 69 km away
  11. 2.378 km ESE of Nikolski, Alaska · 3459 days ago · 46 km deep · 79 km away
  12. 1.989 km SW of Unalaska, Alaska · 3461 days ago · 69 km deep · 71 km away
  13. 2.1126 km S of Unalaska, Alaska · 3461 days ago · 10 km deep · 29 km away
  14. 2.3126 km S of Unalaska, Alaska · 3461 days ago · 2 km deep · 31 km away
  15. 4.0130 km ESE of Nikolski, Alaska · 3461 days ago · 10 km deep · 31 km away
  16. 1.8south of the Aleutian Islands · 3462 days ago · 12 km deep · 75 km away
  17. 1.826 km SSE of Unalaska, Alaska · 3462 days ago · 70 km deep · 83 km away
  18. 1.857 km S of Unalaska, Alaska · 3462 days ago · 51 km deep · 48 km away
  19. 1.624 km ESE of Unalaska, Alaska · 3464 days ago · 87 km deep · 98 km away
  20. 1.782 km SSE of Unalaska, Alaska · 3464 days ago · 32 km deep · 59 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak01753krw0d (also filed as ak15795570). Read Fri, Oct 2, 2026, 1:45 PM UTC.