Alaska earthquakes

M1.8 earthquake 147 km S of Adak, Alaska

A magnitude 1.8 earthquake struck 147 km S of Adak, Alaska on Thu, Sep 2, 2021, 2:56 AM HADT (11:56 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M1.9 92 km SSE 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
1.8 (ml), micro
Local time
UTC
2021-09-02 11:56:25 UTC
Depth
25.1 km (15.6 mi), shallow
Epicenter
50.553° N, 176.387° 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.

Stations used
33

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 24 in the 30 days before it.

After

  1. 1.992 km SSE of Adak, Alaska · 1847 days ago · 14 km deep · 61 km away
  2. 2.8182 km SE of Adak, Alaska · 1847 days ago · 29 km deep · 91 km away
  3. 1.570 km SSE of Adak, Alaska · 1845 days ago · 18 km deep · 83 km away
  4. 1.663 km SSE of Adak, Alaska · 1843 days ago · 19 km deep · 91 km away
  5. 1.7111 km S of Adak, Alaska · 1843 days ago · 35 km deep · 52 km away
  6. 2.7105 km SSE of Adak, Alaska · 1842 days ago · 10 km deep · 44 km away
  7. 2.957 km SSE of Adak, Alaska · 1838 days ago · 35 km deep · 100 km away
  8. 1.660 km SE of Adak, Alaska · 1835 days ago · 13 km deep · 99 km away
  9. 4.5161 km S of Adak, Alaska · 1835 days ago · 10 km deep · 15 km away
  10. 2.4163 km S of Adak, Alaska · 1835 days ago · 24 km deep · 17 km away
  11. 3.1164 km S of Adak, Alaska · 1834 days ago · 10 km deep · 18 km away
  12. 1.579 km S of Adak, Alaska · 1827 days ago · 26 km deep · 69 km away
  13. 3.1Andreanof Islands, Aleutian Islands, Alaska · 1825 days ago · 10 km deep · 38 km away
  14. 2.861 km SE of Adak, Alaska · 1823 days ago · 35 km deep · 99 km away
  15. 1.9Andreanof Islands, Aleutian Islands, Alaska · 1813 days ago · 24 km deep · 98 km away
  16. 3.7187 km S of Adak, Alaska · 1813 days ago · 10 km deep · 40 km away
  17. 2.961 km SSW of Adak, Alaska · 1809 days ago · 51 km deep · 94 km away
  18. 2.4177 km SSE of Adak, Alaska · 1807 days ago · 13 km deep · 79 km away
  19. 2.855 km S of Adak, Alaska · 1807 days ago · 32 km deep · 95 km away
  20. 2.560 km SE of Adak, Alaska · 1805 days ago · 36 km deep · 98 km away
  21. 2.759 km SSE of Adak, Alaska · 1794 days ago · 34 km deep · 97 km away
  22. 2.8188 km S of Adak, Alaska · 1793 days ago · 10 km deep · 42 km away
  23. 3.2118 km SSW of Adak, Alaska · 1792 days ago · 33 km deep · 62 km away
  24. 1.9156 km SSE of Adak, Alaska · 1789 days ago · 36 km deep · 68 km away
  25. 2.3178 km S of Adak, Alaska · 1788 days ago · 20 km deep · 60 km away

Before

  1. 3.262 km SE of Adak, Alaska · 1848 days ago · 26 km deep · 97 km away
  2. 1.979 km SSW of Adak, Alaska · 1850 days ago · 28 km deep · 91 km away
  3. 2.0183 km S of Adak, Alaska · 1851 days ago · 25 km deep · 59 km away
  4. 1.758 km SSE of Adak, Alaska · 1852 days ago · 24 km deep · 92 km away
  5. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1855 days ago · 15 km deep · 59 km away
  6. 1.662 km SE of Adak, Alaska · 1855 days ago · 26 km deep · 99 km away
  7. 1.9170 km SE of Adak, Alaska · 1855 days ago · 10 km deep · 89 km away
  8. 2.687 km S of Adak, Alaska · 1859 days ago · 35 km deep · 70 km away
  9. 3.064 km SSW of Adak, Alaska · 1859 days ago · 35 km deep · 97 km away
  10. 2.1186 km SSW of Adak, Alaska · 1860 days ago · 26 km deep · 96 km away
  11. 3.4200 km SSW of Adak, Alaska · 1861 days ago · 10 km deep · 79 km away
  12. 1.7209 km S of Adak, Alaska · 1861 days ago · 21 km deep · 76 km away
  13. 1.5137 km SSW of Adak, Alaska · 1862 days ago · 26 km deep · 99 km away
  14. 1.572 km SSE of Adak, Alaska · 1862 days ago · 21 km deep · 78 km away
  15. 1.7102 km SSW of Adak, Alaska · 1865 days ago · 47 km deep · 83 km away
  16. 2.6101 km SSW of Adak, Alaska · 1865 days ago · 24 km deep · 79 km away
  17. 3.2198 km S of Adak, Alaska · 1867 days ago · 10 km deep · 60 km away
  18. 1.667 km SSW of Adak, Alaska · 1867 days ago · 27 km deep · 98 km away
  19. 3.671 km SSW of Adak, Alaska · 1869 days ago · 35 km deep · 99 km away
  20. 1.774 km SSE of Adak, Alaska · 1871 days ago · 25 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021b9djure. Read Thu, Sep 24, 2026, 8:05 AM UTC.