Alaska earthquakes

M2.8 earthquake 182 km SE of Adak, Alaska

A magnitude 2.8 earthquake struck 182 km SE of Adak, Alaska on Fri, Sep 3, 2021, 11:07 AM HADT (20:07 UTC), 29 km (18 mi) below the surface.

A larger quake followed: M3.7 101 km ESE of Adak, 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
2.8 (ml), micro
Local time
UTC
2021-09-03 20:07:31 UTC
Depth
28.6 km (17.8 mi), shallow
Epicenter
50.549° N, 175.099° 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 4.9 km horizontally, 11.2 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
250°, poorly surrounded by stations
Stations used
21

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 1.7109 km S of Atka, Alaska · 1842 days ago · 24 km deep · 98 km away
  2. 2.7105 km SSE of Adak, Alaska · 1842 days ago · 10 km deep · 96 km away
  3. 3.7101 km ESE of Adak, Alaska · 1840 days ago · 35 km deep · 100 km away
  4. 4.5161 km S of Adak, Alaska · 1835 days ago · 10 km deep · 84 km away
  5. 2.4163 km S of Adak, Alaska · 1835 days ago · 24 km deep · 84 km away
  6. 3.1164 km S of Adak, Alaska · 1834 days ago · 10 km deep · 83 km away
  7. 3.0135 km SSW of Atka, Alaska · 1833 days ago · 14 km deep · 58 km away
  8. 3.1Andreanof Islands, Aleutian Islands, Alaska · 1825 days ago · 10 km deep · 93 km away
  9. 3.7187 km S of Adak, Alaska · 1813 days ago · 10 km deep · 97 km away
  10. 2.4177 km SSE of Adak, Alaska · 1807 days ago · 13 km deep · 12 km away
  11. 2.8188 km S of Adak, Alaska · 1793 days ago · 10 km deep · 83 km away
  12. 2.1178 km S of Atka, Alaska · 1789 days ago · 23 km deep · 55 km away
  13. 1.9156 km SSE of Adak, Alaska · 1789 days ago · 36 km deep · 28 km away
  14. 2.7108 km S of Atka, Alaska · 1789 days ago · 28 km deep · 89 km away

Before

  1. 1.992 km SSE of Adak, Alaska · 1847 days ago · 14 km deep · 98 km away
  2. 1.8147 km S of Adak, Alaska · 1848 days ago · 25 km deep · 91 km away
  3. 2.7188 km S of Atka, Alaska · 1850 days ago · 10 km deep · 79 km away
  4. 2.1178 km S of Atka, Alaska · 1851 days ago · 7 km deep · 88 km away
  5. 2.2187 km SSW of Atka, Alaska · 1852 days ago · 24 km deep · 19 km away
  6. 1.9170 km SE of Adak, Alaska · 1855 days ago · 10 km deep · 13 km away
  7. 2.0193 km S of Atka, Alaska · 1863 days ago · 10 km deep · 99 km away
  8. 1.6116 km SSW of Atka, Alaska · 1869 days ago · 19 km deep · 77 km away
  9. 2.0199 km S of Atka, Alaska · 1870 days ago · 9 km deep · 75 km away
  10. 2.0112 km SSW of Atka, Alaska · 1873 days ago · 12 km deep · 82 km away
  11. 3.9111 km SSW of Atka, Alaska · 1873 days ago · 27 km deep · 83 km away
  12. 1.6101 km SSE of Adak, Alaska · 1873 days ago · 24 km deep · 83 km away
  13. 2.6112 km SSW of Atka, Alaska · 1873 days ago · 11 km deep · 82 km away
  14. 3.6112 km SSW of Atka, Alaska · 1873 days ago · 11 km deep · 82 km away
  15. 2.0120 km SSW of Atka, Alaska · 1874 days ago · 21 km deep · 81 km away
  16. 1.9123 km SSW of Atka, Alaska · 1874 days ago · 26 km deep · 78 km away
  17. 1.9180 km S of Adak, Alaska · 1876 days ago · 24 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ff28 (also filed as ak021bb65luw). Read Thu, Sep 24, 2026, 7:05 AM UTC.