Alaska earthquakes

M1.8 earthquake 46 km S of Ugashik, Alaska

A magnitude 1.8 earthquake struck 46 km S of Ugashik, Alaska on Thu, Dec 27, 2018, 6:57 AM AKST (15:57 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.4 55 km E of Port Heiden, 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
1.8 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2018-12-27 15:57:54 UTC
Depth
6.6 km (4.1 mi), shallow
Epicenter
57.105° N, 157.543° 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
1.8ML, local (Richter)AACSEPreliminary

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
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 43 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 1.547 km S of Ugashik, Alaska · 2839 days ago · 2 km deep · 4 km away
  2. 2.884 km ENE of Chignik, Alaska · 2835 days ago · 83 km deep · 68 km away
  3. 3.046 km SW of Pilot Point, Alaska · 2834 days ago · 133 km deep · 33 km away
  4. 1.961 km S of Ugashik, Alaska · 2830 days ago · 10 km deep · 15 km away
  5. 3.0116 km SSE of Ugashik, Alaska · 2827 days ago · 60 km deep · 87 km away
  6. 1.8116 km W of Akhiok, Alaska · 2825 days ago · 19 km deep · 99 km away
  7. 2.396 km ENE of Chignik, Alaska · 2816 days ago · 73 km deep · 59 km away
  8. 1.926 km S of Ugashik, Alaska · 2816 days ago · 10 km deep · 23 km away
  9. 2.351 km SSE of Ugashik, Alaska · 2809 days ago · 96 km deep · 22 km away
  10. 2.7119 km SSE of Ugashik, Alaska · 2803 days ago · 53 km deep · 88 km away
  11. 2.557 km SSW of Ugashik, Alaska · 2803 days ago · 2 km deep · 12 km away
  12. 1.645 km ENE of Port Heiden, Alaska · 2803 days ago · 20 km deep · 24 km away
  13. 4.455 km E of Port Heiden, Alaska · 2803 days ago · 13 km deep · 13 km away
  14. 3.455 km SSW of Ugashik, Alaska · 2803 days ago · 10 km deep · 13 km away
  15. 3.058 km SSW of Ugashik, Alaska · 2803 days ago · 9 km deep · 13 km away
  16. 1.642 km ENE of Port Heiden, Alaska · 2803 days ago · 24 km deep · 25 km away
  17. 1.859 km SSW of Ugashik, Alaska · 2803 days ago · 6 km deep · 14 km away
  18. 1.657 km SSW of Ugashik, Alaska · 2803 days ago · 10 km deep · 13 km away
  19. 1.660 km SSW of Ugashik, Alaska · 2803 days ago · 7 km deep · 15 km away
  20. 1.748 km ENE of Port Heiden, Alaska · 2803 days ago · 15 km deep · 20 km away
  21. 1.758 km SSW of Ugashik, Alaska · 2803 days ago · 7 km deep · 13 km away
  22. 1.758 km E of Port Heiden, Alaska · 2803 days ago · 14 km deep · 14 km away
  23. 2.157 km SSW of Ugashik, Alaska · 2803 days ago · 10 km deep · 12 km away
  24. 2.157 km SSW of Ugashik, Alaska · 2803 days ago · 13 km deep · 12 km away
  25. 2.030 km ESE of Ugashik, AK · 2802 days ago · 107 km deep · 45 km away
  26. 2.960 km E of Port Heiden, Alaska · 2801 days ago · 7 km deep · 15 km away
  27. 2.633 km ESE of Ugashik, Alaska · 2799 days ago · 101 km deep · 50 km away
  28. 2.049 km SSW of Ugashik, AK · 2798 days ago · 3 km deep · 3 km away
  29. 3.064 km S of Ugashik, Alaska · 2798 days ago · 10 km deep · 27 km away
  30. 1.756 km E of Ugashik, Alaska · 2795 days ago · 93 km deep · 79 km away
  31. 1.987 km ESE of Ugashik, Alaska · 2795 days ago · 83 km deep · 91 km away
  32. 2.942 km SSW of Ugashik, Alaska · 2794 days ago · 6 km deep · 5 km away
  33. 2.644 km S of Ugashik, Alaska · 2794 days ago · 5 km deep · 3 km away
  34. 2.124 km SSE of Ugashik, Alaska · 2794 days ago · 9 km deep · 32 km away
  35. 2.3114 km ENE of Chignik, Alaska · 2794 days ago · 70 km deep · 81 km away
  36. 2.160 km SSE of Ugashik, Alaska · 2794 days ago · 4 km deep · 40 km away
  37. 1.958 km SSE of Ugashik, Alaska · 2789 days ago · 13 km deep · 36 km away
  38. 2.156 km ENE of Ugashik, Alaska · 2788 days ago · 118 km deep · 90 km away
  39. 2.4118 km WSW of Akhiok, Alaska · 2784 days ago · 90 km deep · 100 km away
  40. 2.258 km S of Ugashik, Alaska · 2784 days ago · 5 km deep · 12 km away
  41. 2.492 km SSE of Ugashik, Alaska · 2781 days ago · 80 km deep · 56 km away
  42. 1.962 km ENE of Ugashik, Alaska · 2781 days ago · 127 km deep · 99 km away
  43. 2.994 km SE of Ugashik, Alaska · 2780 days ago · 54 km deep · 81 km away

Before

  1. 1.947 km S of Ugashik, Alaska · 2839 days ago · 9 km deep · 4 km away
  2. 1.642 km ESE of Ugashik, Alaska · 2839 days ago · 5 km deep · 59 km away
  3. 2.498 km ENE of Chignik, Alaska · 2841 days ago · 36 km deep · 77 km away
  4. 3.760 km ENE of Ugashik, Alaska · 2842 days ago · 122 km deep · 95 km away
  5. 2.550 km E of Chignik, Alaska · 2844 days ago · 47 km deep · 90 km away
  6. 2.4Alaska Peninsula · 2846 days ago · 99 km deep · 89 km away
  7. 2.397 km ENE of Chignik, Alaska · 2848 days ago · 4 km deep · 63 km away
  8. 2.069 km SE of Ugashik, Alaska · 2849 days ago · 79 km deep · 67 km away
  9. 2.288 km ESE of Ugashik, Alaska · 2851 days ago · 71 km deep · 88 km away
  10. 2.634 km ESE of Port Heiden, Alaska · 2854 days ago · 116 km deep · 52 km away
  11. 2.3Alaska Peninsula · 2855 days ago · 95 km deep · 17 km away
  12. 2.194 km SE of Ugashik, Alaska · 2856 days ago · 75 km deep · 85 km away
  13. 2.0117 km SE of Ugashik, Alaska · 2862 days ago · 64 km deep · 93 km away
  14. 2.537 km ENE of Port Heiden, Alaska · 2864 days ago · 2 km deep · 31 km away
  15. 1.893 km ESE of Ugashik, Alaska · 2866 days ago · 68 km deep · 95 km away
  16. 2.141 km ENE of Ugashik, Alaska · 2867 days ago · 126 km deep · 74 km away
  17. 2.078 km ESE of Ugashik, Alaska · 2867 days ago · 84 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018glaa4df (also filed as aacse018glaa4df). Read Mon, Oct 5, 2026, 8:43 AM UTC.