Alaska earthquakes

M2.6 earthquake 131 km S of Unalaska, Alaska

A magnitude 2.6 earthquake struck 131 km S of Unalaska, Alaska on Thu, Apr 15, 2021, 5:02 AM AKDT (13:02 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.0 142 km ESE of Nikolski, 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
2.6 (ml), micro
Local time
UTC
2021-04-15 13:02:35 UTC
Depth
4.1 km (2.6 mi), shallow
Epicenter
52.690° N, 166.627° 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 5.1 km horizontally, 10.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
278°, poorly surrounded by stations
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 22 in the 30 days before it.

After

  1. 3.0142 km ESE of Nikolski, Alaska · 1986 days ago · 6 km deep · 17 km away
  2. 1.663 km SSW of Unalaska, Alaska · 1986 days ago · 30 km deep · 78 km away
  3. 1.687 km SE of Unalaska, Alaska · 1985 days ago · 68 km deep · 98 km away
  4. 1.582 km SW of Unalaska, Alaska · 1985 days ago · 62 km deep · 80 km away
  5. 2.865 km SE of Nikolski, Alaska · 1983 days ago · 35 km deep · 97 km away
  6. 3.286 km E of Nikolski, Alaska · 1981 days ago · 35 km deep · 68 km away
  7. 2.869 km SE of Nikolski, Alaska · 1976 days ago · 22 km deep · 94 km away
  8. 2.792 km ESE of Nikolski, Alaska · 1976 days ago · 26 km deep · 61 km away
  9. 2.6105 km S of Unalaska, Alaska · 1974 days ago · 32 km deep · 29 km away
  10. 3.6119 km E of Nikolski, Alaska · 1973 days ago · 51 km deep · 36 km away
  11. 2.088 km E of Nikolski, Alaska · 1968 days ago · 50 km deep · 64 km away
  12. 1.972 km SSE of Unalaska, Alaska · 1958 days ago · 20 km deep · 77 km away
  13. 3.6217 km SE of Nikolski, Alaska · 1944 days ago · 10 km deep · 99 km away
  14. 1.686 km SSW of Unalaska, Alaska · 1941 days ago · 23 km deep · 72 km away
  15. 3.472 km SSW of Unalaska, Alaska · 1941 days ago · 53 km deep · 64 km away
  16. 3.881 km S of Unalaska, Alaska · 1937 days ago · 35 km deep · 50 km away
  17. 2.042 km SSW of Unalaska, Alaska · 1934 days ago · 75 km deep · 95 km away

Before

  1. 1.769 km S of Unalaska, Alaska · 1987 days ago · 21 km deep · 63 km away
  2. 1.986 km SW of Unalaska, Alaska · 1988 days ago · 26 km deep · 83 km away
  3. 1.969 km E of Nikolski, Alaska · 1990 days ago · 40 km deep · 87 km away
  4. 1.879 km SE of Unalaska, Alaska · 1990 days ago · 16 km deep · 91 km away
  5. 2.9Fox Islands, Aleutian Islands, Alaska · 1992 days ago · 52 km deep · 70 km away
  6. 3.191 km SE of Nikolski, Alaska · 1992 days ago · 12 km deep · 92 km away
  7. 3.1Fox Islands, Aleutian Islands, Alaska · 1996 days ago · 20 km deep · 96 km away
  8. 1.887 km SSW of Unalaska, Alaska · 1996 days ago · 26 km deep · 55 km away
  9. 2.077 km SSW of Unalaska, Alaska · 2003 days ago · 25 km deep · 57 km away
  10. 1.6104 km E of Nikolski, Alaska · 2008 days ago · 26 km deep · 53 km away
  11. 2.938 km SSE of Unalaska, Alaska · 2008 days ago · 80 km deep · 99 km away
  12. 1.771 km SSW of Unalaska, Alaska · 2009 days ago · 50 km deep · 66 km away
  13. 1.8107 km E of Nikolski, Alaska · 2009 days ago · 16 km deep · 50 km away
  14. 2.3124 km S of Unalaska, Alaska · 2009 days ago · 5 km deep · 20 km away
  15. 2.880 km SE of Unalaska, Alaska · 2011 days ago · 35 km deep · 94 km away
  16. 3.077 km SE of Unalaska, Alaska · 2011 days ago · 27 km deep · 96 km away
  17. 1.988 km ENE of Nikolski, Alaska · 2013 days ago · 55 km deep · 82 km away
  18. 3.278 km S of Unalaska, Alaska · 2015 days ago · 25 km deep · 54 km away
  19. 1.574 km S of Unalaska, Alaska · 2015 days ago · 45 km deep · 58 km away
  20. 1.986 km SSW of Unalaska, Alaska · 2017 days ago · 26 km deep · 58 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e1cj (also filed as ak0214tv6lvw). Read Wed, Sep 23, 2026, 6:48 PM UTC.