Alaska earthquakes

M2.9 earthquake 15 km NW of Nelson Lagoon, Alaska

A magnitude 2.9 earthquake struck 15 km NW of Nelson Lagoon, Alaska on Wed, Aug 18, 2021, 5:35 PM AKDT (01:35 UTC), 203 km (126 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
2.9 (ml), micro
Local time
UTC
2021-08-19 01:35:02 UTC
Depth
202.8 km (126.0 mi), intermediate-depth
Epicenter
56.112° N, 161.344° 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 6.5 km horizontally, 6.8 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
109°
Stations used
59

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.618 km S of Nelson Lagoon, Alaska · 1859 days ago · 160 km deep · 31 km away
  2. 2.046 km N of Sand Point, Alaska · 1858 days ago · 99 km deep · 63 km away
  3. 1.542 km WNW of Sand Point, Alaska · 1855 days ago · 93 km deep · 68 km away
  4. 2.136 km NW of Ivanof Bay, Alaska · 1854 days ago · 151 km deep · 91 km away
  5. 2.214 km W of Nelson Lagoon, Alaska · 1853 days ago · 207 km deep · 15 km away
  6. 1.614 km NNW of Sand Point, Alaska · 1853 days ago · 79 km deep · 87 km away
  7. 2.057 km NNE of King Cove, Alaska · 1852 days ago · 115 km deep · 75 km away
  8. 1.814 km N of Sand Point, Alaska · 1848 days ago · 76 km deep · 87 km away
  9. 1.753 km SW of Nelson Lagoon, Alaska · 1847 days ago · 120 km deep · 60 km away
  10. 1.622 km W of Ivanof Bay, Alaska · 1841 days ago · 9 km deep · 98 km away
  11. 3.142 km NE of Nelson Lagoon, Alaska · 1831 days ago · 180 km deep · 44 km away
  12. 2.95 km SSW of Nelson Lagoon, Alaska · 1828 days ago · 172 km deep · 18 km away
  13. 2.6Alaska Peninsula · 1827 days ago · 159 km deep · 35 km away

Before

  1. 1.838 km SE of Nelson Lagoon, Alaska · 1866 days ago · 136 km deep · 53 km away
  2. 2.760 km NNE of King Cove, Alaska · 1875 days ago · 150 km deep · 72 km away
  3. 1.9Alaska Peninsula · 1879 days ago · 80 km deep · 91 km away
  4. 1.651 km SW of Nelson Lagoon, Alaska · 1884 days ago · 109 km deep · 58 km away
  5. 1.641 km W of Ivanof Bay, Alaska · 1887 days ago · 12 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000f7nk (also filed as ak021am1y3xr). Read Wed, Sep 23, 2026, 2:36 AM UTC.