Alaska earthquakes

M1.6 earthquake 18 km S of Nelson Lagoon, Alaska

A magnitude 1.6 earthquake struck 18 km S of Nelson Lagoon, Alaska on Fri, Aug 20, 2021, 12:18 PM AKDT (20:18 UTC), 160 km (99 mi) below the surface.

A larger quake followed: M3.1 42 km NE of Nelson Lagoon, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.6 (ml), micro
Local time
UTC
2021-08-20 20:18:35 UTC
Depth
160.1 km (99.5 mi), intermediate-depth
Epicenter
55.835° N, 161.255° 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
18

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 2.046 km N of Sand Point, Alaska · 1865 days ago · 99 km deep · 44 km away
  2. 1.542 km WNW of Sand Point, Alaska · 1862 days ago · 93 km deep · 37 km away
  3. 2.136 km NW of Ivanof Bay, Alaska · 1861 days ago · 151 km deep · 93 km away
  4. 2.214 km W of Nelson Lagoon, Alaska · 1860 days ago · 207 km deep · 21 km away
  5. 1.614 km NNW of Sand Point, Alaska · 1860 days ago · 79 km deep · 59 km away
  6. 2.057 km NNE of King Cove, Alaska · 1859 days ago · 115 km deep · 52 km away
  7. 2.617 km SSE of Sand Point, Alaska · 1859 days ago · 2 km deep · 90 km away
  8. 1.516 km SE of Sand Point, Alaska · 1859 days ago · 14 km deep · 89 km away
  9. 1.846 km WSW of Sand Point, Alaska · 1859 days ago · 74 km deep · 79 km away
  10. 1.716 km SSE of Sand Point, Alaska · 1858 days ago · 15 km deep · 90 km away
  11. 1.814 km N of Sand Point, Alaska · 1855 days ago · 76 km deep · 60 km away
  12. 2.725 km ENE of Cold Bay, Alaska · 1855 days ago · 124 km deep · 92 km away
  13. 1.753 km SW of Nelson Lagoon, Alaska · 1855 days ago · 120 km deep · 39 km away
  14. 2.017 km ENE of King Cove, Alaska · 1854 days ago · 89 km deep · 95 km away
  15. 1.929 km SW of Ivanof Bay, Alaska · 1848 days ago · 5 km deep · 92 km away
  16. 1.622 km W of Ivanof Bay, Alaska · 1848 days ago · 9 km deep · 89 km away
  17. 2.130 km S of Sand Point, Alaska · 1840 days ago · 49 km deep · 98 km away
  18. 3.142 km NE of Nelson Lagoon, Alaska · 1839 days ago · 180 km deep · 57 km away
  19. 1.728 km SW of Sand Point, Alaska · 1835 days ago · 61 km deep · 77 km away
  20. 2.95 km SSW of Nelson Lagoon, Alaska · 1835 days ago · 172 km deep · 14 km away
  21. 2.6Alaska Peninsula · 1834 days ago · 159 km deep · 17 km away
  22. 2.321 km E of Sand Point, Alaska · 1829 days ago · 67 km deep · 89 km away
  23. 1.511 km NE of King Cove, Alaska · 1826 days ago · 4 km deep · 97 km away
  24. 1.734 km ENE of King Cove, Alaska · 1812 days ago · 93 km deep · 82 km away
  25. 2.018 km SW of Sand Point, Alaska · 1810 days ago · 62 km deep · 74 km away

Before

  1. 2.915 km NW of Nelson Lagoon, Alaska · 1868 days ago · 203 km deep · 31 km away
  2. 1.838 km SE of Nelson Lagoon, Alaska · 1874 days ago · 136 km deep · 34 km away
  3. 3.020 km N of King Cove, Alaska · 1878 days ago · 161 km deep · 93 km away
  4. 1.727 km SSE of Sand Point, Alaska · 1881 days ago · 6 km deep · 98 km away
  5. 3.330 km S of Sand Point, Alaska · 1881 days ago · 10 km deep · 99 km away
  6. 2.760 km NNE of King Cove, Alaska · 1882 days ago · 150 km deep · 54 km away
  7. 2.229 km E of King Cove, Alaska · 1885 days ago · 96 km deep · 94 km away
  8. 1.9Alaska Peninsula · 1887 days ago · 80 km deep · 61 km away
  9. 1.523 km E of Sand Point, Alaska · 1888 days ago · 10 km deep · 91 km away
  10. 2.618 km ENE of King Cove, Alaska · 1889 days ago · 113 km deep · 93 km away
  11. 3.132 km NNE of Cold Bay, Alaska · 1889 days ago · 171 km deep · 88 km away
  12. 1.516 km SE of Sand Point, Alaska · 1890 days ago · 6 km deep · 89 km away
  13. 1.651 km SW of Nelson Lagoon, Alaska · 1891 days ago · 109 km deep · 36 km away
  14. 1.815 km SSE of Sand Point, Alaska · 1892 days ago · 55 km deep · 88 km away
  15. 1.641 km W of Ivanof Bay, Alaska · 1894 days ago · 12 km deep · 70 km away
  16. 1.630 km NE of King Cove, Alaska · 1894 days ago · 22 km deep · 78 km away
  17. 1.710 km NNE of King Cove, Alaska · 1896 days ago · 6 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021ao0p4bw. Read Wed, Sep 30, 2026, 11:55 AM UTC.