Alaska earthquakes

M2.3 earthquake 51 km SSW of Ugashik, Alaska

A magnitude 2.3 earthquake struck 51 km SSW of Ugashik, Alaska on Tue, Oct 16, 2018, 8:36 PM AKDT (04:36 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.8 65 km SSE of Ugashik, 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
2.3 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2018-10-17 04:36:11 UTC
Depth
6.7 km (4.2 mi), shallow
Epicenter
57.063° N, 157.577° 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
2.3ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
2.2ML, 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
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.459 km E of Chignik, Alaska · 2907 days ago · 72 km deep · 74 km away
  2. 2.348 km ENE of Port Heiden, Alaska · 2907 days ago · 3 km deep · 18 km away
  3. 2.142 km E of Port Heiden, Alaska · 2907 days ago · 106 km deep · 23 km away
  4. 2.865 km SSE of Ugashik, Alaska · 2906 days ago · 82 km deep · 38 km away
  5. 2.665 km E of Chignik, Alaska · 2905 days ago · 56 km deep · 74 km away
  6. 2.492 km ENE of Chignik, Alaska · 2904 days ago · 53 km deep · 58 km away
  7. 2.149 km SSE of Ugashik, Alaska · 2903 days ago · 103 km deep · 36 km away
  8. 2.074 km SE of Ugashik, Alaska · 2899 days ago · 73 km deep · 68 km away
  9. 2.298 km SSE of Ugashik, Alaska · 2899 days ago · 76 km deep · 66 km away
  10. 2.277 km ENE of Chignik, Alaska · 2892 days ago · 73 km deep · 50 km away
  11. 2.4115 km E of Chignik, Alaska · 2891 days ago · 77 km deep · 89 km away
  12. 2.759 km E of Ugashik, Alaska · 2887 days ago · 105 km deep · 81 km away
  13. 1.869 km E of Ugashik, Alaska · 2885 days ago · 109 km deep · 98 km away
  14. 2.052 km ENE of Port Heiden, Alaska · 2884 days ago · 16 km deep · 14 km away
  15. 1.984 km SE of Ugashik, Alaska · 2876 days ago · 78 km deep · 72 km away
  16. 2.4120 km E of Chignik, Alaska · 2873 days ago · 78 km deep · 90 km away
  17. 2.818 km ESE of Chignik, Alaska · 2866 days ago · 51 km deep · 99 km away
  18. 2.078 km ESE of Ugashik, Alaska · 2865 days ago · 84 km deep · 92 km away
  19. 2.141 km ENE of Ugashik, Alaska · 2864 days ago · 126 km deep · 79 km away
  20. 1.893 km ESE of Ugashik, Alaska · 2864 days ago · 68 km deep · 97 km away
  21. 2.537 km ENE of Port Heiden, Alaska · 2862 days ago · 2 km deep · 29 km away
  22. 2.0117 km SE of Ugashik, Alaska · 2860 days ago · 64 km deep · 92 km away
  23. 2.194 km SE of Ugashik, Alaska · 2854 days ago · 75 km deep · 87 km away
  24. 2.3Alaska Peninsula · 2853 days ago · 95 km deep · 18 km away
  25. 2.634 km ESE of Port Heiden, Alaska · 2852 days ago · 116 km deep · 47 km away
  26. 2.288 km ESE of Ugashik, Alaska · 2849 days ago · 71 km deep · 91 km away

Before

  1. 1.962 km SE of Ugashik, Alaska · 2909 days ago · 10 km deep · 47 km away
  2. 2.546 km E of Port Heiden, Alaska · 2910 days ago · 8 km deep · 20 km away
  3. 2.1116 km ENE of Chignik, Alaska · 2914 days ago · 81 km deep · 87 km away
  4. 2.186 km SSE of Ugashik, Alaska · 2916 days ago · 75 km deep · 51 km away
  5. 2.165 km ENE of Chignik, Alaska · 2918 days ago · 58 km deep · 66 km away
  6. 2.564 km SE of Ugashik, Alaska · 2924 days ago · 84 km deep · 63 km away
  7. 1.849 km E of Port Heiden, Alaska · 2926 days ago · 4 km deep · 18 km away
  8. 2.178 km SE of Ugashik, Alaska · 2928 days ago · 1 km deep · 71 km away
  9. 1.756 km SE of Ugashik, Alaska · 2931 days ago · 87 km deep · 58 km away
  10. 2.051 km ESE of Port Heiden, Alaska · 2931 days ago · 84 km deep · 37 km away
  11. 1.718 km S of Ugashik, Alaska · 2936 days ago · 120 km deep · 34 km away
  12. 1.941 km ENE of Ugashik, Alaska · 2937 days ago · 129 km deep · 84 km away
  13. 2.165 km S of Ugashik, Alaska · 2938 days ago · 84 km deep · 17 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018dbog4b4 (also filed as ak20285287, aacse018dbog4b4). Read Sat, Oct 3, 2026, 6:27 AM UTC.