Alaska earthquakes

M1.8 earthquake 35 km SW of Unalaska, Alaska

A magnitude 1.8 earthquake struck 35 km SW of Unalaska, Alaska on Sun, Jul 15, 2018, 9:42 PM AKDT (05:42 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M4.1 79 km S 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.

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The earthquake

Magnitude
1.8 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2018-07-16 05:42:33 UTC
Depth
15.0 km (9.3 mi), shallow
Epicenter
53.642° N, 166.913° 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
1.8ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
1.85ML, local (Richter)AVFinal · ±0.147 · 7 stations
1.76ML, local (Richter)AVFinal · ±0.223 · 6 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
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 93 in the 60 days after this one and 48 in the 30 days before it.

After

  1. 1.967 km SSW of Unalaska, Alaska · 3000 days ago · 47 km deep · 41 km away
  2. 2.666 km SSW of Unalaska, Alaska · 2999 days ago · 73 km deep · 32 km away
  3. 2.336 km WSW of Unalaska, Alaska · 2999 days ago · 6 km deep · 13 km away
  4. 2.138 km WSW of Unalaska, Alaska · 2999 days ago · 5 km deep · 17 km away
  5. 1.938 km WSW of Dutch Harbor, Alaska · 2999 days ago · 7 km deep · 22 km away
  6. 1.835 km WSW of Unalaska, Alaska · 2999 days ago · 5 km deep · 9 km away
  7. 2.055 km SW of Unalaska, Alaska · 2996 days ago · 16 km deep · 20 km away
  8. 1.790 km SW of Unalaska, Alaska · 2996 days ago · 83 km deep · 54 km away
  9. 1.635 km SW of Unalaska, Alaska · 2994 days ago · 11 km deep · 2 km away
  10. 1.6103 km E of Nikolski, Alaska · 2994 days ago · 26 km deep · 92 km away
  11. 2.016 km WSW of Dutch Harbor, Alaska · 2994 days ago · 5 km deep · 25 km away
  12. 1.635 km SW of Unalaska, Alaska · 2993 days ago · 16 km deep · 2 km away
  13. 2.035 km SW of Unalaska, Alaska · 2993 days ago · 15 km deep · 4 km away
  14. 1.542 km ESE of Unalaska, Alaska · 2993 days ago · 35 km deep · 63 km away
  15. 2.621 km SSE of Akutan, Alaska · 2993 days ago · 118 km deep · 92 km away
  16. 1.915 km WSW of Dutch Harbor, Alaska · 2993 days ago · 5 km deep · 26 km away
  17. 2.284 km SSW of Unalaska, Alaska · 2991 days ago · 40 km deep · 53 km away
  18. 1.716 km WSW of Dutch Harbor, Alaska · 2991 days ago · 6 km deep · 25 km away
  19. 2.017 km WSW of Dutch Harbor, Alaska · 2991 days ago · 7 km deep · 25 km away
  20. 1.817 km WSW of Dutch Harbor, Alaska · 2991 days ago · 9 km deep · 25 km away
  21. 1.617 km WSW of Dutch Harbor, Alaska · 2991 days ago · 5 km deep · 25 km away
  22. 1.817 km W of Dutch Harbor, Alaska · 2991 days ago · 8 km deep · 26 km away
  23. 1.617 km W of Dutch Harbor, Alaska · 2991 days ago · 8 km deep · 26 km away
  24. 2.237 km SSW of Unalaska, Alaska · 2989 days ago · 66 km deep · 18 km away
  25. 1.782 km SW of Unalaska, Alaska · 2988 days ago · 13 km deep · 47 km away
  26. 1.774 km SSE of Akutan, Alaska · 2988 days ago · 13 km deep · 97 km away
  27. 2.369 km SE of Unalaska, Alaska · 2987 days ago · 13 km deep · 75 km away
  28. 2.468 km SSW of Unalaska, Alaska · 2987 days ago · 38 km deep · 42 km away
  29. 1.52 km SW of Unalaska, Alaska · 2986 days ago · 11 km deep · 33 km away
  30. 1.714 km WSW of Akutan, Alaska · 2983 days ago · 14 km deep · 79 km away
  31. 1.862 km SSE of Akutan, Alaska · 2983 days ago · 44 km deep · 93 km away
  32. 2.682 km S of Unalaska, Alaska · 2980 days ago · 26 km deep · 57 km away
  33. 2.052 km SW of Unalaska, Alaska · 2980 days ago · 67 km deep · 17 km away
  34. 2.291 km SE of Unalaska, Alaska · 2980 days ago · 10 km deep · 98 km away
  35. 2.636 km ESE of Unalaska, Alaska · 2979 days ago · 64 km deep · 59 km away
  36. 1.691 km SSW of Unalaska, Alaska · 2979 days ago · 47 km deep · 58 km away
  37. 2.43 km E of Unalaska, Alaska · 2978 days ago · 10 km deep · 38 km away
  38. 1.868 km SSW of Unalaska, Alaska · 2978 days ago · 64 km deep · 43 km away
  39. 2.07 km NNE of Dutch Harbor, Alaska · 2978 days ago · 129 km deep · 44 km away
  40. 2.16 km NE of Akutan, Alaska · 2977 days ago · 99 km deep · 99 km away
  41. 1.6105 km W of Dutch Harbor, Alaska · 2977 days ago · 15 km deep · 93 km away
  42. 1.63 km SE of Unalaska, Alaska · 2977 days ago · 12 km deep · 36 km away
  43. 2.073 km SSW of Unalaska, Alaska · 2976 days ago · 82 km deep · 40 km away
  44. 1.991 km SSE of Unalaska, Alaska · 2975 days ago · 13 km deep · 79 km away
  45. 1.569 km SE of Unalaska, Alaska · 2975 days ago · 21 km deep · 80 km away
  46. 2.576 km S of Akutan, Alaska · 2975 days ago · 24 km deep · 88 km away
  47. 1.539 km WSW of Dutch Harbor, Alaska · 2973 days ago · 5 km deep · 21 km away
  48. 1.936 km WNW of Dutch Harbor, Alaska · 2970 days ago · 13 km deep · 47 km away
  49. 2.762 km SSW of Unalaska, Alaska · 2969 days ago · 57 km deep · 35 km away
  50. 1.63 km ESE of Akutan, Alaska · 2968 days ago · 107 km deep · 94 km away
  51. 1.891 km SSW of Unalaska, Alaska · 2968 days ago · 30 km deep · 61 km away
  52. 2.593 km SSW of Unalaska, Alaska · 2963 days ago · 29 km deep · 62 km away
  53. 2.3103 km S of Unalaska, Alaska · 2963 days ago · 36 km deep · 78 km away
  54. 2.067 km SSW of Unalaska, Alaska · 2963 days ago · 46 km deep · 39 km away
  55. 2.334 km S of Akutan, Alaska · 2962 days ago · 51 km deep · 72 km away
  56. 2.173 km SE of Unalaska, Alaska · 2961 days ago · 16 km deep · 86 km away
  57. 2.354 km SE of Unalaska, Alaska · 2960 days ago · 52 km deep · 68 km away
  58. 1.553 km SW of Unalaska, Alaska · 2960 days ago · 13 km deep · 18 km away
  59. 2.319 km SE of Unalaska, Alaska · 2960 days ago · 75 km deep · 43 km away
  60. 4.179 km S of Unalaska, Alaska · 2960 days ago · 39 km deep · 54 km away

The first 60 of 93.

Before

  1. 1.733 km S of Akutan, Alaska · 3000 days ago · 67 km deep · 73 km away
  2. 1.963 km SSE of Unalaska, Alaska · 3001 days ago · 26 km deep · 57 km away
  3. 1.634 km SW of Unalaska, Alaska · 3001 days ago · 16 km deep · 2 km away
  4. 2.567 km S of Unalaska, Alaska · 3001 days ago · 86 km deep · 46 km away
  5. 2.864 km SE of Unalaska, Alaska · 3002 days ago · 35 km deep · 71 km away
  6. 1.514 km NE of Dutch Harbor, Alaska · 3002 days ago · 15 km deep · 51 km away
  7. 1.742 km ESE of Unalaska, Alaska · 3004 days ago · 95 km deep · 65 km away
  8. 1.967 km S of Unalaska, Alaska · 3005 days ago · 26 km deep · 51 km away
  9. 2.595 km SSW of Unalaska, Alaska · 3005 days ago · 19 km deep · 64 km away
  10. 3.691 km SSW of Unalaska, Alaska · 3005 days ago · 28 km deep · 60 km away
  11. 2.325 km ESE of Unalaska, Alaska · 3006 days ago · 90 km deep · 53 km away
  12. 2.068 km SW of Unalaska, Alaska · 3009 days ago · 13 km deep · 32 km away
  13. 1.988 km ENE of Nikolski, Alaska · 3009 days ago · 26 km deep · 64 km away
  14. 3.574 km S of Unalaska, Alaska · 3010 days ago · 28 km deep · 50 km away
  15. 1.959 km SE of Unalaska, Alaska · 3010 days ago · 8 km deep · 74 km away
  16. 1.760 km S of Akutan, Alaska · 3014 days ago · 45 km deep · 78 km away
  17. 1.691 km SSW of Unalaska, Alaska · 3015 days ago · 26 km deep · 58 km away
  18. 2.940 km SE of Unalaska, Alaska · 3018 days ago · 70 km deep · 54 km away
  19. 1.619 km SSE of Unalaska, Alaska · 3018 days ago · 97 km deep · 30 km away
  20. 1.728 km E of Unalaska, Alaska · 3018 days ago · 97 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak01891w3lyk (also filed as ak19874890, av61744961, av70795264). Read Fri, Oct 2, 2026, 2:19 AM UTC.