Alaska earthquakes

M2.9 earthquake 183 km SSE of Atka, Alaska

A magnitude 2.9 earthquake struck 183 km SSE of Atka, Alaska on Wed, Sep 15, 2021, 7:47 AM HADT (16:47 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M4.0 97 km S of Atka, 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
2.9 (ml), micro
Local time
UTC
2021-09-15 16:47:14 UTC
Depth
20.7 km (12.9 mi), shallow
Epicenter
50.622° N, 173.433° 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 5.1 km horizontally, 13.6 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
248°, poorly surrounded by stations
Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 2.7105 km SSE of Atka, Alaska · 1830 days ago · 35 km deep · 86 km away
  2. 2.796 km SSE of Atka, Alaska · 1830 days ago · 35 km deep · 87 km away
  3. 2.7138 km SE of Atka, Alaska · 1790 days ago · 10 km deep · 80 km away
  4. 2.1178 km S of Atka, Alaska · 1789 days ago · 23 km deep · 63 km away
  5. 2.7108 km S of Atka, Alaska · 1789 days ago · 28 km deep · 98 km away
  6. 4.097 km S of Atka, Alaska · 1787 days ago · 12 km deep · 92 km away
  7. 3.983 km SSE of Atka, Alaska · 1786 days ago · 35 km deep · 99 km away
  8. 2.4112 km SSE of Atka, Alaska · 1786 days ago · 37 km deep · 70 km away
  9. 2.8111 km SSE of Atka, Alaska · 1783 days ago · 35 km deep · 75 km away
  10. 3.0102 km S of Atka, Alaska · 1780 days ago · 10 km deep · 91 km away
  11. 2.2122 km S of Atka, Alaska · 1777 days ago · 30 km deep · 79 km away
  12. 2.1164 km S of Atka, Alaska · 1776 days ago · 14 km deep · 40 km away

Before

  1. 3.1110 km SE of Atka, Alaska · 1837 days ago · 35 km deep · 97 km away
  2. 1.7109 km S of Atka, Alaska · 1842 days ago · 24 km deep · 84 km away
  3. 2.893 km SSE of Atka, Alaska · 1842 days ago · 35 km deep · 89 km away
  4. 2.2180 km SSE of Atka, Alaska · 1848 days ago · 22 km deep · 26 km away
  5. 2.2140 km SE of Atka, Alaska · 1848 days ago · 14 km deep · 89 km away
  6. 2.7188 km S of Atka, Alaska · 1850 days ago · 10 km deep · 41 km away
  7. 2.1178 km S of Atka, Alaska · 1851 days ago · 7 km deep · 30 km away
  8. 2.2187 km SSW of Atka, Alaska · 1852 days ago · 24 km deep · 99 km away
  9. 2.1165 km SSE of Atka, Alaska · 1855 days ago · 11 km deep · 20 km away
  10. 1.690 km SSE of Atka, Alaska · 1857 days ago · 41 km deep · 92 km away
  11. 2.0163 km SE of Atka, Alaska · 1858 days ago · 20 km deep · 74 km away
  12. 3.0167 km SE of Atka, Alaska · 1860 days ago · 10 km deep · 89 km away
  13. 2.9178 km SE of Atka, Alaska · 1860 days ago · 10 km deep · 84 km away
  14. 2.5102 km SSE of Atka, Alaska · 1860 days ago · 10 km deep · 80 km away
  15. 2.8197 km SE of Atka, Alaska · 1861 days ago · 10 km deep · 65 km away
  16. 2.2103 km S of Atka, Alaska · 1862 days ago · 29 km deep · 86 km away
  17. 2.0193 km S of Atka, Alaska · 1863 days ago · 10 km deep · 25 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fbka (also filed as ak021buygm6k). Read Thu, Sep 24, 2026, 10:20 AM UTC.