Alaska earthquakes

M3.1 earthquake 106 km W of Dutch Harbor, Alaska

A magnitude 3.1 earthquake struck 106 km W of Dutch Harbor, Alaska on Mon, Oct 11, 2021, 12:35 PM AKDT (20:35 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M3.6 85 km WSW of Unalaska, Alaska. This one was a foreshock.

Dutch Harbor forecastMore in Alaska

Map

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

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The earthquake

Magnitude
3.1 (ml), minor
Local time
UTC
2021-10-11 20:35:38 UTC
Depth
13.7 km (8.5 mi), shallow
Epicenter
53.986° N, 168.159° 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 3.1 km horizontally, 3.6 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
192°, poorly surrounded by stations
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 22 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 3.091 km SW of Unalaska, Alaska · 1808 days ago · 35 km deep · 96 km away
  2. 2.082 km SW of Unalaska, Alaska · 1806 days ago · 73 km deep · 74 km away
  3. 3.685 km WSW of Unalaska, Alaska · 1803 days ago · 113 km deep · 56 km away
  4. 1.746 km SW of Unalaska, Alaska · 1800 days ago · 18 km deep · 83 km away
  5. 3.686 km ENE of Nikolski, Alaska · 1799 days ago · 76 km deep · 90 km away
  6. 1.719 km WSW of Dutch Harbor, Alaska · 1795 days ago · 6 km deep · 89 km away
  7. 2.014 km WSW of Dutch Harbor, Alaska · 1794 days ago · 7 km deep · 93 km away
  8. 1.513 km WSW of Dutch Harbor, Alaska · 1794 days ago · 10 km deep · 94 km away
  9. 1.513 km WSW of Dutch Harbor, Alaska · 1794 days ago · 10 km deep · 94 km away
  10. 1.614 km WSW of Dutch Harbor, Alaska · 1791 days ago · 8 km deep · 94 km away
  11. 2.615 km WSW of Unalaska, Alaska · 1791 days ago · 13 km deep · 93 km away
  12. 1.614 km WSW of Dutch Harbor, Alaska · 1791 days ago · 9 km deep · 93 km away
  13. 1.613 km WSW of Dutch Harbor, Alaska · 1791 days ago · 8 km deep · 94 km away
  14. 2.686 km ENE of Nikolski, Alaska · 1787 days ago · 64 km deep · 95 km away
  15. 1.681 km SW of Unalaska, Alaska · 1782 days ago · 13 km deep · 98 km away
  16. 1.845 km SW of Unalaska, Alaska · 1775 days ago · 10 km deep · 88 km away
  17. 1.641 km SW of Unalaska, Alaska · 1765 days ago · 68 km deep · 95 km away
  18. 1.656 km SW of Unalaska, Alaska · 1763 days ago · 71 km deep · 92 km away
  19. 1.985 km ENE of Nikolski, Alaska · 1758 days ago · 53 km deep · 99 km away
  20. 1.776 km SW of Unalaska, Alaska · 1757 days ago · 11 km deep · 85 km away
  21. 1.987 km ENE of Nikolski, Alaska · 1754 days ago · 56 km deep · 95 km away
  22. 1.654 km SW of Unalaska, Alaska · 1754 days ago · 13 km deep · 85 km away

Before

  1. 2.156 km SW of Unalaska, Alaska · 1822 days ago · 89 km deep · 81 km away
  2. 1.6Fox Islands, Aleutian Islands, Alaska · 1823 days ago · 23 km deep · 90 km away
  3. 1.720 km WSW of Dutch Harbor, Alaska · 1826 days ago · 5 km deep · 88 km away
  4. 1.820 km WSW of Dutch Harbor, Alaska · 1826 days ago · 5 km deep · 89 km away
  5. 1.818 km WSW of Dutch Harbor, Alaska · 1826 days ago · 7 km deep · 90 km away
  6. 1.651 km SW of Unalaska, Alaska · 1832 days ago · 15 km deep · 82 km away
  7. 1.720 km WSW of Dutch Harbor, Alaska · 1833 days ago · 6 km deep · 87 km away
  8. 1.621 km WSW of Dutch Harbor, Alaska · 1833 days ago · 7 km deep · 87 km away
  9. 1.521 km WSW of Dutch Harbor, Alaska · 1833 days ago · 7 km deep · 87 km away
  10. 1.620 km WSW of Dutch Harbor, Alaska · 1833 days ago · 7 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fues (also filed as av91391661, ak021d20qtc7). Read Wed, Sep 23, 2026, 9:56 PM UTC.