Alaska earthquakes

M3.8 earthquake 223 km SW of Nikolski, Alaska

A magnitude 3.8 earthquake struck 223 km SW of Nikolski, Alaska on Wed, Jun 16, 2021, 3:04 PM HADT (00:04 UTC), 29 km (18 mi) below the surface.

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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
3.8 (mb), minor
Local time
UTC
2021-06-17 00:04:48 UTC
Depth
29.0 km (18.0 mi), shallow
Epicenter
51.498° N, 171.133° 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 8.9 km horizontally, 6.9 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
142°
Stations used
67

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.6217 km ESE of Atka, Alaska · 1924 days ago · 10 km deep · 38 km away
  2. 2.8240 km SSW of Nikolski, Alaska · 1901 days ago · 12 km deep · 93 km away
  3. 2.2178 km SW of Nikolski, Alaska · 1898 days ago · 24 km deep · 54 km away
  4. 2.9160 km SW of Nikolski, Alaska · 1889 days ago · 0 km deep · 62 km away
  5. 2.4144 km SW of Nikolski, Alaska · 1889 days ago · 19 km deep · 79 km away
  6. 3.3179 km SW of Nikolski, Alaska · 1884 days ago · 35 km deep · 61 km away
  7. 3.4181 km WSW of Nikolski, Alaska · 1884 days ago · 10 km deep · 66 km away
  8. 3.1156 km ESE of Atka, Alaska · 1877 days ago · 35 km deep · 70 km away
  9. 3.2185 km ESE of Atka, Alaska · 1876 days ago · 36 km deep · 42 km away
  10. 3.1140 km SW of Nikolski, Alaska · 1875 days ago · 21 km deep · 84 km away
  11. 3.0174 km E of Atka, Alaska · 1873 days ago · 35 km deep · 63 km away
  12. 1.9130 km SW of Nikolski, Alaska · 1870 days ago · 21 km deep · 93 km away
  13. 2.5183 km SW of Nikolski, Alaska · 1868 days ago · 37 km deep · 40 km away
  14. 2.1191 km SW of Nikolski, Alaska · 1868 days ago · 38 km deep · 54 km away

Before

  1. 3.4258 km SSW of Nikolski, Alaska · 1946 days ago · 16 km deep · 74 km away
  2. 3.8154 km SW of Nikolski, Alaska · 1950 days ago · 35 km deep · 69 km away
  3. 3.4203 km SSW of Nikolski, Alaska · 1952 days ago · 10 km deep · 46 km away
  4. 3.2163 km E of Atka, Alaska · 1955 days ago · 28 km deep · 84 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000edpc. Read Thu, Sep 24, 2026, 12:48 PM UTC.