Alaska earthquakes

M1.9 earthquake 123 km SSE of Ugashik, Alaska

A magnitude 1.9 earthquake struck 123 km SSE of Ugashik, Alaska on Tue, Feb 20, 2018, 3:26 AM AKST (12:26 UTC), 46 km (29 mi) below the surface.

A larger quake followed: M3.4 103 km ESE of Chignik, 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
2018-02-20 12:26:03 UTC
Depth
46.3 km (28.8 mi), shallow
Epicenter
56.547° N, 156.406° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

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
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 32 in the 60 days after this one and 21 in the 30 days before it.

After

  1. 2.160 km SSW of Ugashik, Alaska · 3144 days ago · 7 km deep · 87 km away
  2. 2.459 km WSW of Akhiok, Alaska · 3144 days ago · 44 km deep · 85 km away
  3. 2.772 km E of Chignik, Alaska · 3139 days ago · 46 km deep · 55 km away
  4. 1.8101 km W of Akhiok, Alaska · 3135 days ago · 76 km deep · 47 km away
  5. 1.969 km W of Akhiok, Alaska · 3135 days ago · 60 km deep · 86 km away
  6. 2.148 km S of Ugashik, Alaska · 3135 days ago · 92 km deep · 80 km away
  7. 2.0135 km E of Chignik, Alaska · 3133 days ago · 40 km deep · 17 km away
  8. 2.095 km E of Chignik, Alaska · 3133 days ago · 21 km deep · 41 km away
  9. 2.465 km WNW of Akhiok, Alaska · 3131 days ago · 25 km deep · 98 km away
  10. 2.382 km SW of Karluk, Alaska · 3129 days ago · 67 km deep · 82 km away
  11. 3.4103 km ESE of Chignik, Alaska · 3125 days ago · 11 km deep · 89 km away
  12. 2.279 km ESE of Chignik, Alaska · 3125 days ago · 17 km deep · 90 km away
  13. 2.787 km ESE of Chignik, Alaska · 3125 days ago · 7 km deep · 89 km away
  14. 2.180 km E of Chignik, Alaska · 3123 days ago · 42 km deep · 47 km away
  15. 1.973 km ESE of Ugashik, Alaska · 3123 days ago · 69 km deep · 71 km away
  16. 2.1116 km E of Chignik, Alaska · 3123 days ago · 51 km deep · 46 km away
  17. 1.953 km ESE of Ugashik, Alaska · 3122 days ago · 58 km deep · 80 km away
  18. 1.779 km WSW of Karluk, Alaska · 3118 days ago · 82 km deep · 96 km away
  19. 1.986 km WSW of Karluk, Alaska · 3117 days ago · 74 km deep · 86 km away
  20. 2.3112 km SW of Akhiok, Alaska · 3110 days ago · 14 km deep · 52 km away
  21. 1.679 km SW of Akhiok, Alaska · 3107 days ago · 13 km deep · 79 km away
  22. 1.966 km ESE of Chignik, Alaska · 3107 days ago · 49 km deep · 77 km away
  23. 2.5120 km SSE of Ugashik, Alaska · 3104 days ago · 65 km deep · 6 km away
  24. 2.7133 km E of Chignik, Alaska · 3099 days ago · 61 km deep · 52 km away
  25. 2.490 km SSE of Ugashik, Alaska · 3098 days ago · 59 km deep · 35 km away
  26. 1.847 km WSW of Akhiok, Alaska · 3094 days ago · 6 km deep · 97 km away
  27. 2.360 km E of Chignik, Alaska · 3094 days ago · 46 km deep · 71 km away
  28. 2.269 km W of Akhiok, Alaska · 3092 days ago · 72 km deep · 87 km away
  29. 2.538 km ESE of Chignik, Alaska · 3088 days ago · 80 km deep · 100 km away
  30. 2.379 km NE of Chignik, Alaska · 3088 days ago · 76 km deep · 62 km away
  31. 2.9153 km SW of Akhiok, Alaska · 3087 days ago · 37 km deep · 80 km away
  32. 1.950 km ENE of Chignik, Alaska · 3086 days ago · 67 km deep · 76 km away

Before

  1. 1.992 km W of Akhiok, Alaska · 3146 days ago · 58 km deep · 63 km away
  2. 1.756 km WSW of Akhiok, Alaska · 3146 days ago · 48 km deep · 87 km away
  3. 2.1Alaska Peninsula · 3146 days ago · 10 km deep · 90 km away
  4. 4.453 km WSW of Akhiok, Alaska · 3147 days ago · 47 km deep · 90 km away · felt by 2
  5. 1.758 km SW of Akhiok, Alaska · 3147 days ago · 9 km deep · 89 km away
  6. 3.090 km SSW of Akhiok, Alaska · 3147 days ago · 42 km deep · 99 km away
  7. 1.766 km WSW of Karluk, Alaska · 3149 days ago · 66 km deep · 99 km away
  8. 2.386 km ESE of Ugashik, Alaska · 3152 days ago · 68 km deep · 70 km away
  9. 2.080 km E of Chignik, Alaska · 3158 days ago · 56 km deep · 47 km away
  10. 2.271 km ESE of Ugashik, Alaska · 3160 days ago · 80 km deep · 77 km away
  11. 2.450 km S of Ugashik, Alaska · 3166 days ago · 1 km deep · 85 km away
  12. 2.689 km E of Chignik, Alaska · 3167 days ago · 43 km deep · 38 km away
  13. 2.051 km W of Akhiok, Alaska · 3167 days ago · 55 km deep · 94 km away
  14. 2.188 km E of Chignik, Alaska · 3168 days ago · 27 km deep · 38 km away
  15. 2.061 km E of Port Heiden, Alaska · 3170 days ago · 6 km deep · 88 km away
  16. 2.476 km ESE of Ugashik, Alaska · 3172 days ago · 77 km deep · 76 km away
  17. 2.3120 km ENE of Chignik, Alaska · 3172 days ago · 74 km deep · 6 km away
  18. 2.346 km SSW of Ugashik, Alaska · 3173 days ago · 15 km deep · 94 km away
  19. 2.898 km ENE of Chignik, Alaska · 3175 days ago · 47 km deep · 33 km away · felt by 1
  20. 2.347 km S of Ugashik, Alaska · 3176 days ago · 3 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0182cjphas (also filed as ak18572000). Read Fri, Oct 2, 2026, 6:29 AM UTC.