Alaska earthquakes

M4.6 earthquake 96 km SE of Akutan, Alaska

A magnitude 4.6 earthquake struck 96 km SE of Akutan, Alaska on Mon, Feb 19, 2018, 3:39 PM AKST (00:39 UTC), 34 km (21 mi) below the surface.

A larger quake followed: M4.8 134 km SE of Akutan, Alaska. This one was a foreshock.

Akutan 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
4.6 (Mww, W-phase moment), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2018-02-20 00:39:03 UTC
Depth
34.2 km (21.3 mi), shallow
Epicenter
53.545° N, 164.707° 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
4.6Mww, W-phase momentUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.089 · 12 stations
4.6Mw, momentAlaska Earthquake CenterPreliminary
4.6Mwr, regional momentUSGS National Earthquake Information CenterMoment tensor · Reviewed

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting
Normal
Moment magnitude
4.6 Mww
Nodal plane 1
Strike 79°, dip 38°, rake -101°
Nodal plane 2
Strike 273°, dip 53°, rake -82°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 2.9 km horizontally, 3.9 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
96°
Stations used
163

Nearest places

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

Nearby

Within 100 km, magnitude 1.6 and up: 112 in the 60 days after this one and 25 in the 30 days before it.

After

  1. 2.095 km SE of Akutan, Alaska · 3145 days ago · 43 km deep · 2 km away
  2. 2.5131 km ESE of Akutan, Alaska · 3145 days ago · 2 km deep · 46 km away
  3. 2.897 km SE of Akutan, Alaska · 3145 days ago · 22 km deep · 6 km away
  4. 2.278 km SSW of False Pass, Alaska · 3145 days ago · 58 km deep · 91 km away
  5. 2.539 km S of Akutan, Alaska · 3142 days ago · 37 km deep · 83 km away
  6. 2.7113 km SSW of False Pass, Alaska · 3142 days ago · 22 km deep · 61 km away
  7. 4.3135 km SSE of Unalaska, Alaska · 3141 days ago · 10 km deep · 98 km away
  8. 2.169 km SE of Akutan, Alaska · 3140 days ago · 38 km deep · 27 km away
  9. 4.8134 km SE of Akutan, Alaska · 3138 days ago · 9 km deep · 39 km away
  10. 3.4135 km SE of Akutan, Alaska · 3138 days ago · 15 km deep · 40 km away
  11. 1.777 km SE of Unalaska, Alaska · 3134 days ago · 12 km deep · 63 km away
  12. 1.979 km SSE of Akutan, Alaska · 3134 days ago · 1 km deep · 27 km away
  13. 2.0100 km SE of Akutan, Alaska · 3132 days ago · 58 km deep · 15 km away
  14. 1.776 km SSE of Unalaska, Alaska · 3132 days ago · 36 km deep · 93 km away
  15. 3.442 km ESE of Unalaska, Alaska · 3132 days ago · 67 km deep · 85 km away
  16. 2.2154 km ESE of Akutan, Alaska · 3132 days ago · 17 km deep · 65 km away
  17. 1.883 km SSE of Akutan, Alaska · 3132 days ago · 50 km deep · 28 km away
  18. 2.4156 km S of False Pass, Alaska · 3131 days ago · 33 km deep · 89 km away
  19. 3.433 km E of Akutan, Alaska · 3131 days ago · 85 km deep · 72 km away
  20. 3.9149 km S of False Pass, Alaska · 3130 days ago · 10 km deep · 76 km away
  21. 2.256 km SSE of Akutan, Alaska · 3130 days ago · 65 km deep · 43 km away
  22. 2.8168 km S of False Pass, Alaska · 3127 days ago · 28 km deep · 91 km away
  23. 3.6144 km SE of Akutan, Alaska · 3126 days ago · 10 km deep · 48 km away
  24. 2.072 km ESE of Akutan, Alaska · 3126 days ago · 65 km deep · 51 km away
  25. 2.376 km SE of Akutan, Alaska · 3126 days ago · 48 km deep · 23 km away
  26. 1.651 km SSE of Akutan, Alaska · 3123 days ago · 33 km deep · 55 km away
  27. 2.067 km ESE of Akutan, Alaska · 3123 days ago · 60 km deep · 37 km away
  28. 1.919 km SE of Akutan, Alaska · 3123 days ago · 106 km deep · 77 km away
  29. 2.4146 km SE of Akutan, Alaska · 3122 days ago · 26 km deep · 51 km away
  30. 3.553 km SE of Unalaska, Alaska · 3118 days ago · 66 km deep · 81 km away
  31. 2.4111 km ESE of Akutan, Alaska · 3117 days ago · 31 km deep · 35 km away
  32. 2.1119 km SSW of False Pass, Alaska · 3117 days ago · 26 km deep · 59 km away
  33. 2.973 km SW of False Pass, Alaska · 3116 days ago · 75 km deep · 95 km away
  34. 2.093 km SSW of False Pass, Alaska · 3116 days ago · 26 km deep · 75 km away
  35. 2.094 km SE of Akutan, Alaska · 3116 days ago · 52 km deep · 4 km away
  36. 1.951 km SE of Akutan, Alaska · 3115 days ago · 44 km deep · 45 km away
  37. 1.943 km ESE of Unalaska, Alaska · 3114 days ago · 34 km deep · 84 km away
  38. 3.0162 km SSE of Akutan, Alaska · 3114 days ago · 21 km deep · 84 km away
  39. 3.6166 km SE of Akutan, Alaska · 3113 days ago · 23 km deep · 71 km away
  40. 1.775 km SSE of Akutan, Alaska · 3113 days ago · 19 km deep · 44 km away
  41. 2.041 km SE of Akutan, Alaska · 3111 days ago · 64 km deep · 55 km away
  42. 2.8140 km SE of Akutan, Alaska · 3111 days ago · 24 km deep · 44 km away
  43. 2.888 km E of Akutan, Alaska · 3110 days ago · 10 km deep · 81 km away
  44. 2.550 km ESE of Akutan, Alaska · 3110 days ago · 71 km deep · 57 km away
  45. 2.4186 km SE of Akutan, Alaska · 3109 days ago · 15 km deep · 93 km away
  46. 1.856 km SSE of Unalaska, Alaska · 3109 days ago · 44 km deep · 93 km away
  47. 2.063 km ENE of Akutan, Alaska · 3108 days ago · 108 km deep · 99 km away
  48. 1.689 km SSE of Unalaska, Alaska · 3108 days ago · 25 km deep · 96 km away
  49. 2.4102 km SSE of Akutan, Alaska · 3107 days ago · 48 km deep · 31 km away
  50. 1.8107 km SSW of False Pass, Alaska · 3107 days ago · 21 km deep · 62 km away
  51. 1.999 km SSE of Akutan, Alaska · 3107 days ago · 40 km deep · 33 km away
  52. 1.932 km SSW of Akutan, Alaska · 3106 days ago · 70 km deep · 91 km away
  53. 2.487 km SE of Akutan, Alaska · 3106 days ago · 54 km deep · 12 km away
  54. 2.5140 km ESE of Akutan, Alaska · 3105 days ago · 12 km deep · 55 km away
  55. 2.271 km SSE of Akutan, Alaska · 3104 days ago · 46 km deep · 39 km away
  56. 2.288 km SE of Unalaska, Alaska · 3102 days ago · 26 km deep · 76 km away
  57. 2.5140 km SE of Akutan, Alaska · 3102 days ago · 10 km deep · 45 km away
  58. 1.887 km SE of Unalaska, Alaska · 3101 days ago · 17 km deep · 71 km away
  59. 1.993 km SE of Akutan, Alaska · 3100 days ago · 51 km deep · 5 km away
  60. 3.6126 km SE of Akutan, Alaska · 3099 days ago · 28 km deep · 31 km away

The first 60 of 112.

Before

  1. 2.137 km S of Akutan, Alaska · 3148 days ago · 47 km deep · 72 km away
  2. 2.187 km SE of Unalaska, Alaska · 3149 days ago · 23 km deep · 77 km away
  3. 2.591 km SSW of False Pass, Alaska · 3151 days ago · 30 km deep · 77 km away
  4. 2.2110 km ESE of Akutan, Alaska · 3152 days ago · 41 km deep · 25 km away
  5. 2.4115 km ESE of Akutan, Alaska · 3153 days ago · 54 km deep · 50 km away
  6. 2.192 km SE of Unalaska, Alaska · 3153 days ago · 23 km deep · 70 km away
  7. 2.271 km SE of Unalaska, Alaska · 3153 days ago · 29 km deep · 78 km away
  8. 1.770 km SE of Unalaska, Alaska · 3153 days ago · 49 km deep · 67 km away
  9. 3.372 km SE of Unalaska, Alaska · 3153 days ago · 32 km deep · 79 km away
  10. 2.368 km SE of Unalaska, Alaska · 3155 days ago · 37 km deep · 81 km away
  11. 2.645 km SE of Akutan, Alaska · 3155 days ago · 58 km deep · 50 km away
  12. 2.960 km ESE of Akutan, Alaska · 3156 days ago · 72 km deep · 51 km away
  13. 3.681 km SE of Unalaska, Alaska · 3156 days ago · 35 km deep · 78 km away
  14. 2.774 km S of Akutan, Alaska · 3157 days ago · 52 km deep · 57 km away
  15. 2.057 km SSE of Unalaska, Alaska · 3158 days ago · 40 km deep · 96 km away
  16. 3.9151 km SE of Akutan, Alaska · 3161 days ago · 19 km deep · 55 km away
  17. 2.7154 km S of False Pass, Alaska · 3161 days ago · 10 km deep · 85 km away
  18. 2.7140 km SSE of Akutan, Alaska · 3161 days ago · 10 km deep · 52 km away
  19. 2.716 km SSW of Akutan, Alaska · 3161 days ago · 115 km deep · 89 km away
  20. 2.177 km ESE of Akutan, Alaska · 3162 days ago · 37 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000d51e (also filed as ak18462379, ak0182ccn29m). Read Thu, Oct 1, 2026, 7:20 AM UTC.