Alaska earthquakes

M3.0 earthquake 160 km WSW of Nikolski, Alaska

A magnitude 3.0 earthquake struck 160 km WSW of Nikolski, Alaska on Fri, Apr 16, 2021, 4:42 AM HADT (13:42 UTC), 60 km (37 mi) below the surface.

A larger quake followed: M4.9 128 km WSW 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
3.0 (ml), minor
Local time
UTC
2021-04-16 13:42:54 UTC
Depth
59.9 km (37.2 mi), shallow
Epicenter
52.355° N, 171.037° 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 7.2 km horizontally, 24.0 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
203°, poorly surrounded by stations
Stations used
21

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 2.5136 km SW of Nikolski, Alaska · 1989 days ago · 35 km deep · 58 km away
  2. 2.7178 km WSW of Nikolski, Alaska · 1989 days ago · 35 km deep · 24 km away
  3. 2.5120 km E of Atka, Alaska · 1989 days ago · 102 km deep · 96 km away
  4. 2.8190 km E of Atka, Alaska · 1989 days ago · 35 km deep · 43 km away
  5. 2.9149 km E of Atka, Alaska · 1989 days ago · 35 km deep · 76 km away
  6. 3.1153 km E of Atka, Alaska · 1988 days ago · 20 km deep · 78 km away
  7. 4.9128 km WSW of Nikolski, Alaska · 1972 days ago · 54 km deep · 34 km away
  8. 3.8189 km ESE of Atka, Alaska · 1963 days ago · 38 km deep · 64 km away
  9. 3.2163 km E of Atka, Alaska · 1958 days ago · 28 km deep · 59 km away
  10. 3.8154 km SW of Nikolski, Alaska · 1953 days ago · 35 km deep · 55 km away
  11. 3.6115 km SW of Nikolski, Alaska · 1947 days ago · 22 km deep · 67 km away
  12. 3.8123 km W of Nikolski, Alaska · 1941 days ago · 111 km deep · 90 km away
  13. 3.0111 km S of Nikolski, Alaska · 1936 days ago · 136 km deep · 75 km away

Before

  1. 3.4134 km SW of Nikolski, Alaska · 1996 days ago · 22 km deep · 52 km away
  2. 2.581 km SW of Nikolski, Alaska · 2002 days ago · 35 km deep · 93 km away
  3. 3.497 km W of Nikolski, Alaska · 2003 days ago · 172 km deep · 92 km away
  4. 3.381 km WSW of Nikolski, Alaska · 2007 days ago · 8 km deep · 82 km away
  5. 3.375 km WSW of Nikolski, Alaska · 2010 days ago · 10 km deep · 88 km away
  6. 3.266 km WSW of Nikolski, Alaska · 2011 days ago · 10 km deep · 94 km away
  7. 2.965 km W of Nikolski, Alaska · 2011 days ago · 10 km deep · 99 km away
  8. 3.6164 km SW of Nikolski, Alaska · 2011 days ago · 37 km deep · 50 km away
  9. 3.568 km W of Nikolski, Alaska · 2011 days ago · 3 km deep · 99 km away
  10. 2.370 km WSW of Nikolski, Alaska · 2011 days ago · 7 km deep · 91 km away
  11. 3.5Fox Islands, Aleutian Islands, Alaska · 2011 days ago · 9 km deep · 90 km away
  12. 3.766 km WSW of Nikolski, Alaska · 2011 days ago · 10 km deep · 97 km away
  13. 4.872 km WSW of Nikolski, Alaska · 2011 days ago · 12 km deep · 89 km away
  14. 2.9119 km WSW of Nikolski, Alaska · 2013 days ago · 117 km deep · 51 km away
  15. 2.8115 km WNW of Nikolski, Alaska · 2013 days ago · 35 km deep · 96 km away
  16. 3.1105 km WSW of Nikolski, Alaska · 2020 days ago · 137 km deep · 62 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e14v (also filed as ak0214viyjar). Read Sun, Sep 27, 2026, 5:28 PM UTC.