Alaska earthquakes

M2.9 earthquake 5 km SSW of Nelson Lagoon, Alaska

A magnitude 2.9 earthquake struck 5 km SSW of Nelson Lagoon, Alaska on Tue, Sep 21, 2021, 4:06 AM AKDT (12:06 UTC), 172 km (107 mi) below the surface.

A larger quake followed: M3.3 15 km NNW 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
2.9 (ml), micro
Local time
UTC
2021-09-21 12:06:58 UTC
Depth
171.9 km (106.8 mi), intermediate-depth
Epicenter
55.959° 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.

Location uncertainty
About 8.0 km horizontally, 7.0 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
120°
Stations used
41

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.6Alaska Peninsula · 1828 days ago · 159 km deep · 19 km away
  2. 2.321 km E of Sand Point, Alaska · 1822 days ago · 67 km deep · 98 km away
  3. 1.734 km ENE of King Cove, Alaska · 1805 days ago · 93 km deep · 95 km away
  4. 2.018 km SW of Sand Point, Alaska · 1804 days ago · 62 km deep · 87 km away
  5. 2.420 km W of Ivanof Bay, Alaska · 1792 days ago · 119 km deep · 91 km away
  6. 1.841 km NNE of Sand Point, Alaska · 1787 days ago · 107 km deep · 63 km away
  7. 1.739 km NE of King Cove, Alaska · 1786 days ago · 10 km deep · 81 km away
  8. 2.435 km NE of King Cove, Alaska · 1783 days ago · 23 km deep · 88 km away
  9. 2.835 km SW of Nelson Lagoon, Alaska · 1782 days ago · 206 km deep · 30 km away
  10. 2.723 km SW of Ivanof Bay, Alaska · 1780 days ago · 92 km deep · 99 km away
  11. 3.315 km NNW of Nelson Lagoon, Alaska · 1780 days ago · 198 km deep · 19 km away
  12. 2.831 km N of King Cove, Alaska · 1773 days ago · 172 km deep · 94 km away

Before

  1. 1.728 km SW of Sand Point, Alaska · 1829 days ago · 61 km deep · 90 km away
  2. 3.142 km NE of Nelson Lagoon, Alaska · 1832 days ago · 180 km deep · 48 km away
  3. 1.622 km W of Ivanof Bay, Alaska · 1842 days ago · 9 km deep · 89 km away
  4. 1.929 km SW of Ivanof Bay, Alaska · 1842 days ago · 5 km deep · 95 km away
  5. 1.753 km SW of Nelson Lagoon, Alaska · 1848 days ago · 120 km deep · 48 km away
  6. 1.814 km N of Sand Point, Alaska · 1849 days ago · 76 km deep · 70 km away
  7. 1.846 km WSW of Sand Point, Alaska · 1852 days ago · 74 km deep · 92 km away
  8. 2.057 km NNE of King Cove, Alaska · 1853 days ago · 115 km deep · 63 km away
  9. 1.614 km NNW of Sand Point, Alaska · 1854 days ago · 79 km deep · 70 km away
  10. 2.214 km W of Nelson Lagoon, Alaska · 1854 days ago · 207 km deep · 12 km away
  11. 2.136 km NW of Ivanof Bay, Alaska · 1855 days ago · 151 km deep · 88 km away
  12. 1.542 km WNW of Sand Point, Alaska · 1856 days ago · 93 km deep · 50 km away
  13. 2.046 km N of Sand Point, Alaska · 1859 days ago · 99 km deep · 49 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fvzh (also filed as ak021c4t28hk). Read Thu, Sep 24, 2026, 2:28 AM UTC.