Alaska earthquakes

M3.6 earthquake 126 km SSW of Nikolski, Alaska

A magnitude 3.6 earthquake struck 126 km SSW of Nikolski, Alaska on Sun, Apr 4, 2021, 8:53 AM AKDT (16:53 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M4.8 49 km SSW 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
3.6 (mb), minor
Local time
UTC
2021-04-04 16:53:09 UTC
Depth
22.0 km (13.7 mi), shallow
Epicenter
51.862° N, 169.452° 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 7.1 km horizontally, 8.7 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
202°, poorly surrounded by stations
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.344 km SSW of Nikolski, Alaska · 1996 days ago · 70 km deep · 82 km away
  2. 2.130 km S of Nikolski, Alaska · 1996 days ago · 41 km deep · 98 km away
  3. 4.849 km SSW of Nikolski, Alaska · 1995 days ago · 42 km deep · 77 km away · felt by 4
  4. 3.976 km SW of Nikolski, Alaska · 1995 days ago · 35 km deep · 60 km away
  5. 3.4134 km SW of Nikolski, Alaska · 1992 days ago · 22 km deep · 69 km away
  6. 2.5136 km SW of Nikolski, Alaska · 1985 days ago · 35 km deep · 63 km away
  7. 3.234 km SSE of Nikolski, Alaska · 1983 days ago · 35 km deep · 99 km away
  8. 4.9128 km WSW of Nikolski, Alaska · 1968 days ago · 54 km deep · 96 km away
  9. 2.9106 km S of Nikolski, Alaska · 1960 days ago · 35 km deep · 60 km away
  10. 3.4203 km SSW of Nikolski, Alaska · 1952 days ago · 10 km deep · 87 km away
  11. 3.8154 km SW of Nikolski, Alaska · 1949 days ago · 35 km deep · 74 km away
  12. 3.8100 km SSW of Nikolski, Alaska · 1944 days ago · 34 km deep · 29 km away
  13. 3.6115 km SW of Nikolski, Alaska · 1943 days ago · 22 km deep · 58 km away
  14. 2.6140 km SSE of Nikolski, Alaska · 1943 days ago · 10 km deep · 82 km away

Before

  1. 2.581 km SW of Nikolski, Alaska · 1999 days ago · 35 km deep · 60 km away
  2. 2.142 km WSW of Nikolski, Alaska · 2000 days ago · 16 km deep · 98 km away
  3. 3.244 km WSW of Nikolski, Alaska · 2006 days ago · 31 km deep · 100 km away
  4. 3.4219 km SSW of Nikolski, Alaska · 2006 days ago · 10 km deep · 95 km away
  5. 3.6164 km SW of Nikolski, Alaska · 2007 days ago · 37 km deep · 84 km away
  6. 2.5Fox Islands, Aleutian Islands, Alaska · 2010 days ago · 30 km deep · 44 km away
  7. 3.191 km SSE of Nikolski, Alaska · 2017 days ago · 10 km deep · 98 km away
  8. 3.388 km SSE of Nikolski, Alaska · 2020 days ago · 10 km deep · 80 km away
  9. 3.379 km SSE of Nikolski, Alaska · 2020 days ago · 17 km deep · 83 km away
  10. 2.164 km SW of Nikolski, Alaska · 2022 days ago · 51 km deep · 78 km away
  11. 2.563 km SSW of Nikolski, Alaska · 2022 days ago · 35 km deep · 67 km away
  12. 3.070 km SSW of Nikolski, Alaska · 2024 days ago · 35 km deep · 58 km away
  13. 3.6136 km SW of Nikolski, Alaska · 2024 days ago · 22 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000e109 (also filed as ak0214bqcxvg). Read Thu, Sep 24, 2026, 2:04 AM UTC.