Alaska earthquakes

M3.6 earthquake 155 km SW of Nikolski, Alaska

A magnitude 3.6 earthquake struck 155 km SW of Nikolski, Alaska on Mon, Nov 8, 2021, 12:16 AM HAST (10:16 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.2 71 km SW of Nikolski, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.6 (ml), minor
Local time
UTC
2021-11-08 10:16:19 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.976° N, 170.527° 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.

Location uncertainty
About 9.0 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
209°, poorly surrounded by stations
Stations used
33

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 3.191 km SSW of Nikolski, Alaska · 1781 days ago · 35 km deep · 83 km away
  2. 3.073 km SSW of Nikolski, Alaska · 1781 days ago · 7 km deep · 86 km away
  3. 3.167 km SW of Nikolski, Alaska · 1779 days ago · 31 km deep · 89 km away
  4. 2.8174 km WSW of Nikolski, Alaska · 1776 days ago · 56 km deep · 50 km away
  5. 2.083 km SW of Nikolski, Alaska · 1774 days ago · 18 km deep · 72 km away
  6. 3.5197 km SSW of Nikolski, Alaska · 1773 days ago · 10 km deep · 97 km away
  7. 3.1158 km WSW of Nikolski, Alaska · 1753 days ago · 123 km deep · 70 km away
  8. 3.1170 km WSW of Nikolski, Alaska · 1751 days ago · 17 km deep · 57 km away
  9. 4.0189 km ESE of Atka, Alaska · 1751 days ago · 39 km deep · 72 km away
  10. 2.561 km SW of Nikolski, Alaska · 1750 days ago · 35 km deep · 96 km away
  11. 2.388 km SSW of Nikolski, Alaska · 1748 days ago · 27 km deep · 92 km away
  12. 3.299 km SW of Nikolski, Alaska · 1747 days ago · 10 km deep · 58 km away
  13. 2.565 km SSW of Nikolski, Alaska · 1742 days ago · 28 km deep · 97 km away
  14. 3.2117 km SSW of Nikolski, Alaska · 1742 days ago · 35 km deep · 66 km away
  15. 3.4113 km SW of Nikolski, Alaska · 1738 days ago · 35 km deep · 44 km away
  16. 4.271 km SW of Nikolski, Alaska · 1733 days ago · 35 km deep · 84 km away
  17. 2.6Fox Islands, Aleutian Islands, Alaska · 1728 days ago · 35 km deep · 75 km away

Before

  1. 3.2185 km E of Atka, Alaska · 1788 days ago · 7 km deep · 81 km away
  2. 2.5136 km SW of Nikolski, Alaska · 1792 days ago · 19 km deep · 21 km away
  3. 3.0143 km SW of Nikolski, Alaska · 1796 days ago · 17 km deep · 21 km away
  4. 2.9125 km SW of Nikolski, Alaska · 1797 days ago · 24 km deep · 32 km away
  5. 3.9Fox Islands, Aleutian Islands, Alaska · 1804 days ago · 46 km deep · 60 km away
  6. 3.4180 km WSW of Nikolski, Alaska · 1805 days ago · 21 km deep · 45 km away
  7. 3.768 km SW of Nikolski, Alaska · 1807 days ago · 130 km deep · 89 km away
  8. 3.8Fox Islands, Aleutian Islands, Alaska · 1809 days ago · 35 km deep · 83 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fsfv (also filed as ak021ec5q5cr). Read Sun, Sep 27, 2026, 2:19 AM UTC.