Alaska earthquakes

M1.8 earthquake 49 km SW of Unalaska, Alaska

A magnitude 1.8 earthquake struck 49 km SW of Unalaska, Alaska on Sun, Apr 4, 2021, 9:07 PM AKDT (05:07 UTC), 68 km (42 mi) below the surface.

A larger quake followed: M3.1 Fox Islands, Aleutian Islands, 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
1.8 (ml), micro
Local time
UTC
2021-04-05 05:07:16 UTC
Depth
68.3 km (42.4 mi), shallow
Epicenter
53.570° N, 167.078° 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
26

Nearest places

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

Nearby

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

After

  1. 1.887 km SSW of Unalaska, Alaska · 1996 days ago · 26 km deep · 49 km away
  2. 3.1Fox Islands, Aleutian Islands, Alaska · 1996 days ago · 20 km deep · 93 km away
  3. 1.669 km WSW of Unalaska, Alaska · 1993 days ago · 14 km deep · 25 km away
  4. 1.570 km WSW of Unalaska, Alaska · 1993 days ago · 8 km deep · 28 km away
  5. 2.045 km SE of Unalaska, Alaska · 1992 days ago · 39 km deep · 66 km away
  6. 2.9Fox Islands, Aleutian Islands, Alaska · 1992 days ago · 52 km deep · 35 km away
  7. 2.058 km S of Akutan, Alaska · 1990 days ago · 82 km deep · 94 km away
  8. 1.879 km SE of Unalaska, Alaska · 1990 days ago · 16 km deep · 91 km away
  9. 1.969 km E of Nikolski, Alaska · 1990 days ago · 40 km deep · 81 km away
  10. 2.024 km S of Akutan, Alaska · 1989 days ago · 98 km deep · 91 km away
  11. 1.986 km SW of Unalaska, Alaska · 1988 days ago · 26 km deep · 38 km away
  12. 1.769 km S of Unalaska, Alaska · 1987 days ago · 21 km deep · 49 km away
  13. 1.663 km SSW of Unalaska, Alaska · 1986 days ago · 30 km deep · 25 km away
  14. 1.582 km SW of Unalaska, Alaska · 1985 days ago · 62 km deep · 35 km away
  15. 2.68 km WNW of Dutch Harbor, Alaska · 1984 days ago · 114 km deep · 46 km away
  16. 1.523 km W of Dutch Harbor, Alaska · 1983 days ago · 5 km deep · 36 km away
  17. 1.926 km ESE of Unalaska, Alaska · 1982 days ago · 74 km deep · 66 km away
  18. 2.169 km SE of Unalaska, Alaska · 1982 days ago · 23 km deep · 92 km away
  19. 3.286 km E of Nikolski, Alaska · 1981 days ago · 35 km deep · 81 km away
  20. 1.865 km SE of Unalaska, Alaska · 1978 days ago · 11 km deep · 84 km away
  21. 1.730 km SW of Unalaska, Alaska · 1978 days ago · 79 km deep · 21 km away
  22. 2.792 km ESE of Nikolski, Alaska · 1976 days ago · 26 km deep · 98 km away
  23. 1.731 km SE of Unalaska, Alaska · 1976 days ago · 43 km deep · 55 km away
  24. 2.6105 km S of Unalaska, Alaska · 1974 days ago · 32 km deep · 73 km away
  25. 3.6119 km E of Nikolski, Alaska · 1973 days ago · 51 km deep · 80 km away
  26. 1.629 km W of Akutan, Alaska · 1969 days ago · 71 km deep · 83 km away
  27. 2.088 km E of Nikolski, Alaska · 1968 days ago · 50 km deep · 91 km away
  28. 1.57 km N of Dutch Harbor, Alaska · 1966 days ago · 10 km deep · 56 km away
  29. 1.972 km SSE of Unalaska, Alaska · 1958 days ago · 20 km deep · 76 km away
  30. 3.733 km SSW of Unalaska, Alaska · 1952 days ago · 77 km deep · 19 km away
  31. 1.686 km SSW of Unalaska, Alaska · 1941 days ago · 23 km deep · 41 km away
  32. 3.472 km SSW of Unalaska, Alaska · 1941 days ago · 53 km deep · 38 km away

Before

  1. 1.679 km SE of Unalaska, AK · 2000 days ago · 22 km deep · 96 km away
  2. 3.093 km WSW of Unalaska, Alaska · 2000 days ago · 71 km deep · 53 km away
  3. 3.366 km SE of Unalaska, Alaska · 2002 days ago · 35 km deep · 88 km away
  4. 2.077 km SSW of Unalaska, Alaska · 2003 days ago · 25 km deep · 47 km away
  5. 2.834 km SSE of Unalaska, Alaska · 2003 days ago · 70 km deep · 51 km away
  6. 1.743 km W of Dutch Harbor, Alaska · 2005 days ago · 7 km deep · 30 km away
  7. 1.6104 km E of Nikolski, Alaska · 2007 days ago · 26 km deep · 73 km away
  8. 2.938 km SSE of Unalaska, Alaska · 2008 days ago · 80 km deep · 50 km away
  9. 1.727 km S of Unalaska, Alaska · 2008 days ago · 89 km deep · 32 km away
  10. 1.771 km SSW of Unalaska, Alaska · 2009 days ago · 50 km deep · 37 km away
  11. 1.8107 km E of Nikolski, Alaska · 2009 days ago · 16 km deep · 72 km away
  12. 2.3124 km S of Unalaska, Alaska · 2009 days ago · 5 km deep · 90 km away
  13. 2.880 km SE of Unalaska, Alaska · 2011 days ago · 35 km deep · 94 km away
  14. 2.266 km SE of Unalaska, Alaska · 2011 days ago · 48 km deep · 86 km away
  15. 2.070 km SE of Unalaska, Alaska · 2011 days ago · 15 km deep · 88 km away
  16. 3.077 km SE of Unalaska, Alaska · 2011 days ago · 27 km deep · 92 km away
  17. 1.825 km SSW of Unalaska, Alaska · 2012 days ago · 70 km deep · 32 km away
  18. 1.988 km ENE of Nikolski, Alaska · 2013 days ago · 55 km deep · 57 km away
  19. 3.278 km S of Unalaska, Alaska · 2015 days ago · 25 km deep · 51 km away
  20. 1.561 km ESE of Unalaska, Alaska · 2015 days ago · 25 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0214d72o8f. Read Wed, Sep 23, 2026, 6:30 PM UTC.