Alaska earthquakes

M2.6 earthquake 217 km ESE of Atka, Alaska

A magnitude 2.6 earthquake struck 217 km ESE of Atka, Alaska on Fri, Jun 18, 2021, 9:41 AM HADT (18:41 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.8 240 km SSW 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
2.6 (ml), micro
Local time
UTC
2021-06-18 18:41:36 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.228° N, 171.470° 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 7.6 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
233°, poorly surrounded by stations
Stations used
16

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.8240 km SSW of Nikolski, Alaska · 1901 days ago · 12 km deep · 98 km away
  2. 2.2178 km SW of Nikolski, Alaska · 1898 days ago · 24 km deep · 90 km away
  3. 2.2187 km SE of Atka, Alaska · 1885 days ago · 11 km deep · 65 km away
  4. 3.3179 km SW of Nikolski, Alaska · 1883 days ago · 35 km deep · 95 km away
  5. 3.4181 km WSW of Nikolski, Alaska · 1883 days ago · 10 km deep · 98 km away
  6. 3.1156 km ESE of Atka, Alaska · 1876 days ago · 35 km deep · 76 km away
  7. 3.2185 km ESE of Atka, Alaska · 1876 days ago · 36 km deep · 56 km away
  8. 3.0174 km E of Atka, Alaska · 1873 days ago · 35 km deep · 81 km away
  9. 2.2187 km SE of Atka, Alaska · 1869 days ago · 3 km deep · 85 km away
  10. 2.5183 km SW of Nikolski, Alaska · 1868 days ago · 37 km deep · 78 km away
  11. 2.1191 km SW of Nikolski, Alaska · 1867 days ago · 38 km deep · 86 km away

Before

  1. 3.8223 km SW of Nikolski, Alaska · 1925 days ago · 29 km deep · 38 km away
  2. 2.0141 km SE of Atka, Alaska · 1939 days ago · 24 km deep · 87 km away
  3. 3.4258 km SSW of Nikolski, Alaska · 1946 days ago · 16 km deep · 66 km away
  4. 3.4203 km SSW of Nikolski, Alaska · 1952 days ago · 10 km deep · 72 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f73t (also filed as ak0217rssc0k). Read Thu, Sep 24, 2026, 7:10 AM UTC.