Alaska earthquakes

M3.1 earthquake 125 km S of Unalaska, Alaska

A magnitude 3.1 earthquake struck 125 km S of Unalaska, Alaska on Thu, Feb 20, 2025, 12:36 AM AKST (09:36 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.9 82 km SSW of Unalaska, 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.

Open the live map with earthquakes

The earthquake

Magnitude
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-02-20 09:36:25 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
52.752° N, 166.755° 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
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.097 · 14 stations
2.8ML, 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 2.9 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
238°, poorly surrounded by stations
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 134 in the 60 days after this one and 106 in the 30 days before it.

After

  1. 2.171 km E of Nikolski, Alaska · 588 days ago · 53 km deep · 75 km away
  2. 1.878 km S of Unalaska, Alaska · 587 days ago · 23 km deep · 48 km away
  3. 1.998 km SSW of Unalaska, Alaska · 587 days ago · 17 km deep · 30 km away
  4. 2.980 km SW of Unalaska, Alaska · 587 days ago · 63 km deep · 72 km away
  5. 1.9130 km S of Unalaska, Alaska · 587 days ago · 6 km deep · 5 km away
  6. 1.778 km S of Unalaska, Alaska · 586 days ago · 26 km deep · 48 km away
  7. 1.681 km SSW of Unalaska, Alaska · 586 days ago · 40 km deep · 45 km away
  8. 1.548 km S of Unalaska, Alaska · 586 days ago · 54 km deep · 79 km away
  9. 2.051 km SW of Unalaska, Alaska · 585 days ago · 7 km deep · 100 km away
  10. 1.993 km SSW of Unalaska, Alaska · 585 days ago · 23 km deep · 37 km away
  11. 1.9127 km S of Unalaska, Alaska · 585 days ago · 5 km deep · 5 km away
  12. 1.793 km S of Unalaska, Alaska · 585 days ago · 6 km deep · 32 km away
  13. 1.752 km SSE of Unalaska, Alaska · 585 days ago · 49 km deep · 91 km away
  14. 1.650 km S of Unalaska, Alaska · 585 days ago · 35 km deep · 77 km away
  15. 3.683 km ENE of Nikolski, Alaska · 584 days ago · 50 km deep · 73 km away
  16. 1.788 km SW of Unalaska, Alaska · 584 days ago · 62 km deep · 66 km away
  17. 2.638 km SSE of Unalaska, Alaska · 584 days ago · 65 km deep · 94 km away
  18. 2.5139 km ESE of Nikolski, Alaska · 584 days ago · 5 km deep · 20 km away
  19. 2.765 km SE of Unalaska, Alaska · 583 days ago · 35 km deep · 94 km away
  20. 1.753 km SSW of Unalaska, Alaska · 583 days ago · 87 km deep · 76 km away
  21. 1.632 km SSW of Unalaska, Alaska · 583 days ago · 99 km deep · 97 km away
  22. 2.087 km SE of Nikolski, Alaska · 582 days ago · 25 km deep · 89 km away
  23. 1.874 km S of Unalaska, Alaska · 582 days ago · 26 km deep · 51 km away
  24. 1.790 km SSW of Unalaska, Alaska · 581 days ago · 35 km deep · 41 km away
  25. 1.8100 km E of Nikolski, Alaska · 580 days ago · 42 km deep · 44 km away
  26. 1.785 km SW of Unalaska, Alaska · 579 days ago · 63 km deep · 69 km away
  27. 1.686 km SSW of Unalaska, Alaska · 579 days ago · 47 km deep · 50 km away
  28. 2.784 km ESE of Nikolski, Alaska · 578 days ago · 35 km deep · 59 km away
  29. 1.633 km SW of Unalaska, Alaska · 577 days ago · 76 km deep · 98 km away
  30. 3.056 km S of Unalaska, Alaska · 577 days ago · 54 km deep · 71 km away
  31. 2.562 km ENE of Nikolski, Alaska · 577 days ago · 64 km deep · 95 km away
  32. 1.876 km SSE of Unalaska, Alaska · 576 days ago · 21 km deep · 70 km away
  33. 2.0138 km ESE of Nikolski, Alaska · 576 days ago · 13 km deep · 22 km away
  34. 1.985 km SSW of Unalaska, Alaska · 575 days ago · 26 km deep · 42 km away
  35. 2.290 km SW of Unalaska, Alaska · 575 days ago · 61 km deep · 63 km away
  36. 1.953 km SW of Unalaska, Alaska · 575 days ago · 64 km deep · 95 km away
  37. 3.288 km SW of Unalaska, Alaska · 575 days ago · 78 km deep · 81 km away
  38. 1.769 km SSE of Unalaska, Alaska · 574 days ago · 23 km deep · 83 km away
  39. 1.545 km S of Unalaska, Alaska · 574 days ago · 25 km deep · 81 km away
  40. 1.673 km SW of Unalaska, Alaska · 574 days ago · 13 km deep · 80 km away
  41. 1.767 km SW of Unalaska, Alaska · 574 days ago · 10 km deep · 89 km away
  42. 2.0100 km E of Nikolski, Alaska · 574 days ago · 39 km deep · 44 km away
  43. 1.889 km SSW of Unalaska, Alaska · 574 days ago · 26 km deep · 44 km away
  44. 3.1166 km SSE of Unalaska, Alaska · 574 days ago · 10 km deep · 95 km away
  45. 2.090 km SSW of Unalaska, Alaska · 573 days ago · 19 km deep · 41 km away
  46. 2.570 km SE of Unalaska, Alaska · 572 days ago · 35 km deep · 87 km away
  47. 2.8157 km SSE of Unalaska, Alaska · 572 days ago · 10 km deep · 77 km away
  48. 2.3133 km S of Unalaska, Alaska · 572 days ago · 26 km deep · 8 km away
  49. 2.5135 km ESE of Nikolski, Alaska · 571 days ago · 10 km deep · 26 km away
  50. 2.284 km E of Nikolski, Alaska · 570 days ago · 58 km deep · 65 km away
  51. 2.996 km E of Nikolski, Alaska · 570 days ago · 35 km deep · 47 km away
  52. 2.280 km SSW of Unalaska, Alaska · 570 days ago · 26 km deep · 50 km away
  53. 3.477 km ENE of Nikolski, Alaska · 570 days ago · 55 km deep · 77 km away
  54. 1.748 km SW of Unalaska, Alaska · 570 days ago · 16 km deep · 92 km away
  55. 1.882 km SSW of Unalaska, Alaska · 568 days ago · 22 km deep · 45 km away
  56. 1.871 km SSW of Unalaska, Alaska · 567 days ago · 38 km deep · 56 km away
  57. 3.0177 km SSE of Unalaska, Alaska · 567 days ago · 10 km deep · 85 km away
  58. 1.978 km SW of Unalaska, Alaska · 566 days ago · 18 km deep · 80 km away
  59. 1.771 km SSE of Unalaska, Alaska · 565 days ago · 23 km deep · 79 km away
  60. 1.593 km SSW of Unalaska, Alaska · 564 days ago · 19 km deep · 47 km away

The first 60 of 134.

Before

  1. 1.970 km SW of Unalaska, Alaska · 588 days ago · 25 km deep · 74 km away
  2. 3.1165 km SE of Nikolski, Alaska · 589 days ago · 10 km deep · 80 km away
  3. 1.863 km S of Unalaska, Alaska · 589 days ago · 47 km deep · 68 km away
  4. 1.876 km SW of Unalaska, Alaska · 590 days ago · 13 km deep · 81 km away
  5. 2.883 km SE of Unalaska, Alaska · 591 days ago · 35 km deep · 97 km away
  6. 1.782 km SW of Unalaska, Alaska · 591 days ago · 29 km deep · 79 km away
  7. 2.283 km SW of Unalaska, Alaska · 592 days ago · 71 km deep · 83 km away
  8. 1.9111 km S of Unalaska, Alaska · 592 days ago · 6 km deep · 15 km away
  9. 1.989 km SW of Unalaska, Alaska · 593 days ago · 64 km deep · 62 km away
  10. 1.737 km SSW of Unalaska, Alaska · 593 days ago · 69 km deep · 88 km away
  11. 1.861 km SW of Unalaska, Alaska · 593 days ago · 74 km deep · 82 km away
  12. 2.179 km SSE of Unalaska, Alaska · 594 days ago · 25 km deep · 69 km away
  13. 1.976 km SSE of Unalaska, Alaska · 594 days ago · 19 km deep · 75 km away
  14. 2.395 km SE of Nikolski, Alaska · 595 days ago · 14 km deep · 87 km away
  15. 2.864 km SW of Unalaska, Alaska · 595 days ago · 85 km deep · 86 km away
  16. 1.972 km ENE of Nikolski, Alaska · 595 days ago · 71 km deep · 97 km away
  17. 2.9129 km S of Unalaska, Alaska · 595 days ago · 10 km deep · 4 km away
  18. 3.591 km SSW of Unalaska, Alaska · 595 days ago · 60 km deep · 57 km away
  19. 1.974 km SW of Unalaska, Alaska · 596 days ago · 82 km deep · 79 km away
  20. 2.1109 km S of Unalaska, Alaska · 596 days ago · 9 km deep · 21 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000pzbh (also filed as ak0252chzdvw). Read Thu, Oct 1, 2026, 4:18 AM UTC.