Alaska earthquakes

M1.9 earthquake 156 km SSE of Adak, Alaska

A magnitude 1.9 earthquake struck 156 km SSE of Adak, Alaska on Sun, Oct 31, 2021, 2:27 AM HADT (11:27 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M4.3 107 km SSW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
1.9 (ml), micro
Local time
UTC
2021-10-31 11:27:22 UTC
Depth
35.8 km (22.2 mi), shallow
Epicenter
50.677° N, 175.445° 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
18

Nearby

Within 100 km, magnitude 1.5 and up: 47 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 2.7108 km S of Atka, Alaska · 1792 days ago · 28 km deep · 94 km away
  2. 2.087 km S of Adak, Alaska · 1789 days ago · 16 km deep · 84 km away
  3. 2.5103 km ESE of Adak, Alaska · 1787 days ago · 35 km deep · 93 km away
  4. 1.665 km SSE of Adak, Alaska · 1787 days ago · 25 km deep · 93 km away
  5. 1.575 km SE of Adak, Alaska · 1783 days ago · 23 km deep · 89 km away
  6. 1.861 km SE of Adak, Alaska · 1781 days ago · 5 km deep · 96 km away
  7. 1.770 km SE of Adak, Alaska · 1781 days ago · 22 km deep · 95 km away
  8. 2.2122 km S of Atka, Alaska · 1780 days ago · 30 km deep · 94 km away
  9. 2.965 km SE of Adak, Alaska · 1780 days ago · 35 km deep · 92 km away
  10. 1.763 km SE of Adak, Alaska · 1777 days ago · 21 km deep · 95 km away
  11. 1.596 km ESE of Adak, Alaska · 1774 days ago · 22 km deep · 98 km away
  12. 1.564 km SSE of Adak, Alaska · 1773 days ago · 18 km deep · 93 km away
  13. 2.5161 km S of Atka, Alaska · 1771 days ago · 24 km deep · 96 km away
  14. 2.770 km SE of Adak, Alaska · 1770 days ago · 32 km deep · 87 km away
  15. 1.662 km SE of Adak, Alaska · 1770 days ago · 26 km deep · 94 km away
  16. 1.766 km SE of Adak, Alaska · 1767 days ago · 25 km deep · 91 km away
  17. 1.962 km SE of Adak, Alaska · 1767 days ago · 26 km deep · 95 km away
  18. 2.574 km SSE of Adak, Alaska · 1762 days ago · 26 km deep · 89 km away
  19. 1.797 km ESE of Adak, Alaska · 1761 days ago · 13 km deep · 94 km away
  20. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1760 days ago · 35 km deep · 89 km away
  21. 3.9112 km SSW of Atka, Alaska · 1760 days ago · 26 km deep · 80 km away
  22. 4.3107 km SSW of Atka, Alaska · 1759 days ago · 32 km deep · 83 km away
  23. 2.6119 km SSW of Atka, Alaska · 1759 days ago · 24 km deep · 74 km away
  24. 2.1113 km SSW of Atka, Alaska · 1759 days ago · 24 km deep · 78 km away
  25. 3.6107 km SSW of Atka, Alaska · 1759 days ago · 12 km deep · 83 km away
  26. 3.0111 km SSW of Atka, Alaska · 1759 days ago · 11 km deep · 80 km away
  27. 2.772 km SE of Adak, Alaska · 1753 days ago · 35 km deep · 86 km away
  28. 2.792 km SE of Adak, Alaska · 1751 days ago · 35 km deep · 81 km away
  29. 2.570 km ESE of Adak, Alaska · 1749 days ago · 35 km deep · 98 km away
  30. 1.865 km SSE of Adak, Alaska · 1748 days ago · 26 km deep · 92 km away
  31. 2.9132 km S of Atka, Alaska · 1747 days ago · 10 km deep · 98 km away
  32. 1.764 km SSE of Adak, Alaska · 1746 days ago · 23 km deep · 93 km away
  33. 2.3161 km SE of Adak, Alaska · 1744 days ago · 10 km deep · 32 km away
  34. 1.875 km ESE of Adak, Alaska · 1742 days ago · 36 km deep · 97 km away
  35. 1.862 km SE of Adak, Alaska · 1742 days ago · 24 km deep · 98 km away
  36. 1.761 km SE of Adak, Alaska · 1742 days ago · 26 km deep · 98 km away
  37. 2.1182 km SSW of Atka, Alaska · 1742 days ago · 5 km deep · 45 km away
  38. 2.4181 km S of Atka, Alaska · 1742 days ago · 20 km deep · 96 km away
  39. 2.7186 km SSE of Adak, Alaska · 1740 days ago · 10 km deep · 31 km away
  40. 2.2171 km S of Adak, Alaska · 1739 days ago · 10 km deep · 67 km away
  41. 3.391 km SE of Adak, Alaska · 1738 days ago · 35 km deep · 81 km away
  42. 2.787 km SE of Adak, Alaska · 1738 days ago · 23 km deep · 76 km away
  43. 2.6103 km SSW of Atka, Alaska · 1737 days ago · 10 km deep · 92 km away
  44. 2.780 km SE of Adak, Alaska · 1736 days ago · 35 km deep · 78 km away
  45. 2.8161 km S of Adak, Alaska · 1734 days ago · 10 km deep · 61 km away
  46. 3.461 km SSE of Adak, Alaska · 1732 days ago · 35 km deep · 96 km away
  47. 3.257 km SSE of Adak, Alaska · 1732 days ago · 35 km deep · 100 km away

Before

  1. 2.1178 km S of Atka, Alaska · 1792 days ago · 23 km deep · 79 km away
  2. 2.073 km SE of Adak, Alaska · 1794 days ago · 23 km deep · 90 km away
  3. 2.8188 km S of Adak, Alaska · 1796 days ago · 10 km deep · 72 km away
  4. 2.759 km SSE of Adak, Alaska · 1797 days ago · 34 km deep · 98 km away
  5. 2.560 km SE of Adak, Alaska · 1808 days ago · 36 km deep · 96 km away
  6. 2.4177 km SSE of Adak, Alaska · 1810 days ago · 13 km deep · 21 km away
  7. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1813 days ago · 23 km deep · 99 km away
  8. 3.7187 km S of Adak, Alaska · 1816 days ago · 10 km deep · 83 km away
  9. 1.967 km SE of Adak, Alaska · 1820 days ago · 22 km deep · 98 km away
  10. 1.763 km SE of Adak, Alaska · 1821 days ago · 27 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021dyy33vq. Read Sun, Sep 27, 2026, 8:05 AM UTC.