Alaska earthquakes

M3.8 earthquake 154 km SW of Nikolski, Alaska

A magnitude 3.8 earthquake struck 154 km SW of Nikolski, Alaska on Sun, May 23, 2021, 4:10 PM HADT (01:10 UTC), 35 km (22 mi) below the surface.

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The earthquake

Magnitude
3.8 (mb), minor
Local time
UTC
2021-05-24 01:10:38 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.987° N, 170.507° 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 12.0 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
268°, poorly surrounded by stations
Stations used
14

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 3.8100 km SSW of Nikolski, Alaska · 1944 days ago · 34 km deep · 72 km away
  2. 3.6115 km SW of Nikolski, Alaska · 1944 days ago · 22 km deep · 38 km away
  3. 3.3153 km SSW of Nikolski, Alaska · 1932 days ago · 10 km deep · 85 km away
  4. 3.0111 km S of Nikolski, Alaska · 1932 days ago · 136 km deep · 81 km away
  5. 3.8223 km SW of Nikolski, Alaska · 1925 days ago · 29 km deep · 69 km away
  6. 2.094 km SSW of Nikolski, Alaska · 1914 days ago · 49 km deep · 87 km away
  7. 3.375 km SW of Nikolski, Alaska · 1910 days ago · 34 km deep · 80 km away
  8. 3.088 km WSW of Nikolski, Alaska · 1907 days ago · 144 km deep · 85 km away
  9. 3.8106 km SW of Nikolski, Alaska · 1899 days ago · 44 km deep · 48 km away
  10. 2.8112 km SSW of Nikolski, Alaska · 1898 days ago · 35 km deep · 55 km away
  11. 2.2178 km SW of Nikolski, Alaska · 1898 days ago · 24 km deep · 31 km away
  12. 2.8114 km SW of Nikolski, Alaska · 1897 days ago · 26 km deep · 41 km away
  13. 2.1Fox Islands, Aleutian Islands, Alaska · 1892 days ago · 25 km deep · 78 km away

Before

  1. 3.4203 km SSW of Nikolski, Alaska · 1952 days ago · 10 km deep · 64 km away
  2. 3.2163 km E of Atka, Alaska · 1954 days ago · 28 km deep · 91 km away
  3. 3.8189 km ESE of Atka, Alaska · 1960 days ago · 38 km deep · 69 km away
  4. 4.9128 km WSW of Nikolski, Alaska · 1969 days ago · 54 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000efhj. Read Thu, Sep 24, 2026, 8:51 AM UTC.