Alaska earthquakes

M2.6 earthquake 105 km S of Unalaska, Alaska

A magnitude 2.6 earthquake struck 105 km S of Unalaska, Alaska on Wed, Apr 28, 2021, 12:25 PM AKDT (20:25 UTC), 32 km (20 mi) below the surface.

A larger quake followed: M3.6 119 km E 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
2021-04-28 20:25:31 UTC
Depth
31.6 km (19.6 mi), shallow
Epicenter
52.934° N, 166.786° 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 7.5 km horizontally, 19.0 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
229°, poorly surrounded by stations
Stations used
24

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 32 in the 30 days before it.

After

  1. 3.6119 km E of Nikolski, Alaska · 1973 days ago · 51 km deep · 23 km away
  2. 2.088 km E of Nikolski, Alaska · 1968 days ago · 50 km deep · 54 km away
  3. 3.653 km ESE of Nikolski, Alaska · 1967 days ago · 35 km deep · 99 km away
  4. 1.972 km SSE of Unalaska, Alaska · 1959 days ago · 20 km deep · 63 km away
  5. 2.746 km ESE of Nikolski, Alaska · 1953 days ago · 24 km deep · 94 km away
  6. 3.733 km SSW of Unalaska, Alaska · 1952 days ago · 77 km deep · 76 km away
  7. 1.686 km SSW of Unalaska, Alaska · 1942 days ago · 23 km deep · 44 km away
  8. 3.472 km SSW of Unalaska, Alaska · 1941 days ago · 53 km deep · 36 km away
  9. 3.881 km S of Unalaska, Alaska · 1937 days ago · 35 km deep · 27 km away
  10. 2.042 km SSW of Unalaska, Alaska · 1934 days ago · 75 km deep · 67 km away
  11. 1.893 km SSW of Unalaska, Alaska · 1923 days ago · 43 km deep · 36 km away
  12. 1.8121 km S of Unalaska, Alaska · 1919 days ago · 5 km deep · 18 km away

Before

  1. 1.731 km SE of Unalaska, Alaska · 1976 days ago · 43 km deep · 87 km away
  2. 2.792 km ESE of Nikolski, Alaska · 1976 days ago · 26 km deep · 55 km away
  3. 2.869 km SE of Nikolski, Alaska · 1976 days ago · 22 km deep · 91 km away
  4. 1.730 km SW of Unalaska, Alaska · 1978 days ago · 79 km deep · 80 km away
  5. 1.865 km SE of Unalaska, Alaska · 1979 days ago · 11 km deep · 87 km away
  6. 3.286 km E of Nikolski, Alaska · 1981 days ago · 35 km deep · 53 km away
  7. 2.169 km SE of Unalaska, Alaska · 1982 days ago · 23 km deep · 96 km away
  8. 2.865 km SE of Nikolski, Alaska · 1983 days ago · 35 km deep · 94 km away
  9. 1.755 km ESE of Nikolski, Alaska · 1985 days ago · 26 km deep · 95 km away
  10. 1.582 km SW of Unalaska, Alaska · 1985 days ago · 62 km deep · 51 km away
  11. 1.687 km SE of Unalaska, Alaska · 1985 days ago · 68 km deep · 90 km away
  12. 1.663 km SSW of Unalaska, Alaska · 1986 days ago · 30 km deep · 49 km away
  13. 3.0142 km ESE of Nikolski, Alaska · 1986 days ago · 6 km deep · 38 km away
  14. 2.6131 km S of Unalaska, Alaska · 1987 days ago · 4 km deep · 29 km away
  15. 1.769 km S of Unalaska, Alaska · 1987 days ago · 21 km deep · 39 km away
  16. 1.986 km SW of Unalaska, Alaska · 1988 days ago · 26 km deep · 56 km away
  17. 1.969 km E of Nikolski, Alaska · 1990 days ago · 40 km deep · 70 km away
  18. 1.879 km SE of Unalaska, Alaska · 1990 days ago · 16 km deep · 81 km away
  19. 2.9Fox Islands, Aleutian Islands, Alaska · 1992 days ago · 52 km deep · 41 km away
  20. 3.191 km SE of Nikolski, Alaska · 1992 days ago · 12 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000efau (also filed as ak0215fhh1am). Read Wed, Sep 23, 2026, 8:30 PM UTC.