QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

38 km NW of Nelson Lagoon, Alaska

· 198 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aleutians East Borough 115 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 3.3 (ml)
Depth
198 km below the surface
Felt
no reports yet
Nearest
Aleutians East Borough, 115 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1086 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 56.2572, -161.6233. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aleutians East Borough, AK 115 km (71 mi) NNE of here earthquakes near Aleutians East Borough

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

32 earthquakes have been recorded within 50 km since this one.

  1. 2.8 50 km NW of Nelson Lagoon, Alaska
  2. 3.3 1 km SE of Nelson Lagoon, Alaska
  3. 2.3 35 km WSW of Nelson Lagoon, Alaska
  4. 1.9 16 km SW of Nelson Lagoon, Alaska
  5. 2.4 19 km NW of Nelson Lagoon, Alaska
  6. 1.8 6 km SSE of Nelson Lagoon, Alaska
  7. 2.8 16 km SW of Nelson Lagoon, Alaska
  8. 3.3 22 km NW of Nelson Lagoon, Alaska
  9. 3.0 24 km NNW of Nelson Lagoon, Alaska
  10. 2.4 28 km WSW of Nelson Lagoon, Alaska
  11. 3.1 43 km NNW of Nelson Lagoon, Alaska
  12. 2.4 5 km E of Nelson Lagoon, Alaska
  13. 2.8 19 km SW of Nelson Lagoon, Alaska
  14. 2.7 18 km SW of Nelson Lagoon, Alaska
  15. 1.8 29 km WSW of Nelson Lagoon, Alaska

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 5.3 on 2016-06-29 — it released about 1,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.