Alaska earthquakes

M1.9 earthquake 69 km SW of Unalaska, Alaska

A magnitude 1.9 earthquake struck 69 km SW of Unalaska, Alaska on Sun, Feb 4, 2018, 10:38 AM AKST (19:38 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M4.2 74 km NE of Nikolski, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.9 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2018-02-04 19:38:47 UTC
Depth
13.7 km (8.5 mi), shallow
Epicenter
53.505° N, 167.380° 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
1.9ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
2.07ML, local (Richter)AVFinal · ±0.199 · 15 stations

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: 74 in the 60 days after this one and 44 in the 30 days before it.

After

  1. 1.996 km S of Unalaska, Alaska · 3159 days ago · 15 km deep · 84 km away
  2. 2.057 km SSE of Unalaska, Alaska · 3158 days ago · 40 km deep · 82 km away
  3. 1.898 km SSW of Unalaska, Alaska · 3155 days ago · 11 km deep · 49 km away
  4. 3.760 km SSW of Unalaska, Alaska · 3155 days ago · 107 km deep · 29 km away
  5. 2.368 km SE of Unalaska, Alaska · 3155 days ago · 37 km deep · 98 km away
  6. 2.271 km WSW of Unalaska, Alaska · 3152 days ago · 6 km deep · 7 km away
  7. 2.487 km SSW of Unalaska, Alaska · 3152 days ago · 19 km deep · 51 km away
  8. 3.480 km SSW of Unalaska, Alaska · 3146 days ago · 43 km deep · 51 km away
  9. 1.86 km ESE of Unalaska, Alaska · 3144 days ago · 11 km deep · 72 km away
  10. 3.2122 km S of Unalaska, Alaska · 3143 days ago · 5 km deep · 92 km away
  11. 2.073 km SW of Unalaska, Alaska · 3142 days ago · 13 km deep · 4 km away
  12. 1.572 km WSW of Unalaska, Alaska · 3142 days ago · 13 km deep · 10 km away
  13. 2.366 km SSW of Unalaska, Alaska · 3139 days ago · 26 km deep · 44 km away
  14. 2.045 km SSE of Unalaska, Alaska · 3139 days ago · 60 km deep · 67 km away
  15. 1.943 km SW of Unalaska, Alaska · 3138 days ago · 7 km deep · 29 km away
  16. 3.873 km S of Unalaska, Alaska · 3137 days ago · 35 km deep · 59 km away
  17. 2.271 km ENE of Nikolski, Alaska · 3136 days ago · 69 km deep · 56 km away
  18. 2.261 km S of Unalaska, Alaska · 3135 days ago · 30 km deep · 54 km away
  19. 1.968 km WSW of Unalaska, Alaska · 3135 days ago · 14 km deep · 5 km away
  20. 1.997 km E of Nikolski, Alaska · 3135 days ago · 26 km deep · 79 km away
  21. 1.73 km E of Unalaska, Alaska · 3134 days ago · 10 km deep · 72 km away
  22. 2.266 km S of Unalaska, Alaska · 3133 days ago · 45 km deep · 60 km away
  23. 1.963 km SSW of Unalaska, Alaska · 3132 days ago · 42 km deep · 39 km away
  24. 2.163 km S of Unalaska, Alaska · 3132 days ago · 26 km deep · 49 km away
  25. 3.490 km SSW of Unalaska, Alaska · 3132 days ago · 35 km deep · 57 km away
  26. 1.776 km SSE of Unalaska, Alaska · 3132 days ago · 36 km deep · 94 km away
  27. 3.442 km ESE of Unalaska, Alaska · 3132 days ago · 67 km deep · 94 km away
  28. 2.477 km S of Unalaska, Alaska · 3131 days ago · 32 km deep · 60 km away
  29. 1.664 km SW of Unalaska, Alaska · 3130 days ago · 11 km deep · 6 km away
  30. 1.984 km S of Unalaska, Alaska · 3130 days ago · 26 km deep · 67 km away
  31. 1.67 km NW of Dutch Harbor, Alaska · 3129 days ago · 14 km deep · 70 km away
  32. 2.146 km SW of Unalaska, Alaska · 3128 days ago · 18 km deep · 24 km away
  33. 2.039 km SSE of Unalaska, Alaska · 3126 days ago · 91 km deep · 70 km away
  34. 2.399 km NNE of Nikolski, Alaska · 3126 days ago · 23 km deep · 52 km away
  35. 1.630 km NE of Nikolski, Alaska · 3126 days ago · 4 km deep · 89 km away
  36. 1.762 km WSW of Unalaska, Alaska · 3124 days ago · 7 km deep · 22 km away
  37. 2.132 km NE of Nikolski, Alaska · 3123 days ago · 7 km deep · 87 km away
  38. 1.664 km WSW of Unalaska, Alaska · 3123 days ago · 13 km deep · 22 km away
  39. 2.376 km ESE of Nikolski, Alaska · 3123 days ago · 37 km deep · 83 km away
  40. 1.927 km SSW of Unalaska, Alaska · 3121 days ago · 82 km deep · 45 km away
  41. 2.345 km ESE of Nikolski, Alaska · 3120 days ago · 47 km deep · 97 km away
  42. 1.829 km SSW of Unalaska, Alaska · 3120 days ago · 77 km deep · 44 km away
  43. 1.985 km E of Nikolski, Alaska · 3120 days ago · 48 km deep · 67 km away
  44. 3.126 km SE of Unalaska, Alaska · 3119 days ago · 16 km deep · 79 km away
  45. 3.425 km SE of Unalaska, Alaska · 3119 days ago · 12 km deep · 78 km away
  46. 1.6Fox Islands, Aleutian Islands, Alaska · 3119 days ago · 7 km deep · 78 km away
  47. 3.553 km SE of Unalaska, Alaska · 3118 days ago · 66 km deep · 95 km away
  48. 2.981 km SSW of Unalaska, Alaska · 3118 days ago · 35 km deep · 49 km away
  49. 2.789 km S of Unalaska, Alaska · 3118 days ago · 35 km deep · 62 km away
  50. 3.486 km SSW of Unalaska, Alaska · 3118 days ago · 31 km deep · 58 km away
  51. 2.176 km SW of Unalaska, Alaska · 3118 days ago · 13 km deep · 17 km away
  52. 4.274 km NE of Nikolski, Alaska · 3117 days ago · 91 km deep · 45 km away
  53. 3.4101 km S of Unalaska, Alaska · 3117 days ago · 30 km deep · 73 km away
  54. 2.992 km S of Unalaska, Alaska · 3117 days ago · 42 km deep · 66 km away
  55. 2.483 km SSW of Unalaska, Alaska · 3117 days ago · 27 km deep · 54 km away
  56. 2.344 km NNE of Nikolski, Alaska · 3117 days ago · 108 km deep · 85 km away
  57. 3.086 km SSW of Unalaska, Alaska · 3117 days ago · 73 km deep · 39 km away
  58. 1.9105 km ESE of Nikolski, Alaska · 3116 days ago · 18 km deep · 86 km away
  59. 2.589 km S of Unalaska, Alaska · 3115 days ago · 30 km deep · 62 km away
  60. 1.943 km ESE of Unalaska, Alaska · 3114 days ago · 34 km deep · 95 km away

The first 60 of 74.

Before

  1. 2.06 km NNW of Dutch Harbor, Alaska · 3161 days ago · 5 km deep · 72 km away
  2. 1.77 km NNW of Dutch Harbor, Alaska · 3161 days ago · 8 km deep · 72 km away
  3. 2.349 km ENE of Nikolski, Alaska · 3162 days ago · 78 km deep · 68 km away
  4. 2.143 km S of Unalaska, Alaska · 3168 days ago · 64 km deep · 52 km away
  5. 2.867 km SSW of Unalaska, Alaska · 3169 days ago · 79 km deep · 30 km away
  6. 2.590 km SSW of Unalaska, Alaska · 3171 days ago · 30 km deep · 53 km away
  7. 2.188 km SSW of Unalaska, Alaska · 3171 days ago · 26 km deep · 53 km away
  8. 1.988 km SSW of Unalaska, Alaska · 3171 days ago · 26 km deep · 51 km away
  9. 1.988 km SSW of Unalaska, Alaska · 3171 days ago · 38 km deep · 50 km away
  10. 3.686 km SSW of Unalaska, Alaska · 3171 days ago · 34 km deep · 48 km away
  11. 3.690 km SSW of Unalaska, Alaska · 3171 days ago · 26 km deep · 55 km away
  12. 2.080 km S of Unalaska, Alaska · 3171 days ago · 24 km deep · 59 km away
  13. 2.482 km S of Unalaska, Alaska · 3171 days ago · 25 km deep · 61 km away
  14. 1.954 km SSE of Unalaska, Alaska · 3175 days ago · 44 km deep · 76 km away
  15. 2.225 km ESE of Unalaska, Alaska · 3176 days ago · 74 km deep · 86 km away
  16. 1.997 km E of Nikolski, Alaska · 3177 days ago · 34 km deep · 68 km away
  17. 2.125 km S of Unalaska, Alaska · 3177 days ago · 93 km deep · 62 km away
  18. 1.671 km WSW of Unalaska, Alaska · 3177 days ago · 26 km deep · 4 km away
  19. 1.9117 km S of Unalaska, Alaska · 3178 days ago · 7 km deep · 91 km away
  20. 2.538 km SSE of Unalaska, Alaska · 3178 days ago · 83 km deep · 71 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0181m7cmnx (also filed as ak18332854, av61650236). Read Thu, Oct 1, 2026, 4:20 AM UTC.