QuakeIndex

Earthquake · reviewed by a seismologist

M 5.0mww

59 km WNW of Nelson Lagoon, Alaska

· 205 km deep · released about 480 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aleutians East Borough 116 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 5.0 (mww)
Depth
205 km below the surface
Felt
no reports yet
Measured shaking
intensity III (ShakeMap)
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Aleutians East Borough, 116 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 279 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre.

How big was it?

This earthquake released about 480 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16× the energy of this one
  3. Magna, Utah 2020 M 5.7 11× the energy of this one
  4. This earthquake M 5.0 about 480 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 1,000× 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 56.2859, -162.0099. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aleutians East Borough, AK 116 km (72 mi) N 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

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

  1. 2.2 25 km W of Nelson Lagoon, Alaska
  2. 4.0 52 km W of Nelson Lagoon, Alaska
  3. 3.1 48 km WNW of Nelson Lagoon, Alaska
  4. 2.5 18 km WNW of Nelson Lagoon, Alaska
  5. 2.8 46 km NW of Nelson Lagoon, Alaska
  6. 2.1 29 km WSW of Nelson Lagoon, Alaska
  7. 3.3 38 km NW of Nelson Lagoon, Alaska
  8. 3.0 25 km NW of Nelson Lagoon, Alaska
  9. 3.0 38 km NW of Nelson Lagoon, Alaska
  10. 2.9 24 km W of Nelson Lagoon, Alaska
  11. 2.9 26 km NW of Nelson Lagoon, Alaska
  12. 2.8 39 km WNW of Nelson Lagoon, Alaska
  13. 2.0 39 km W of Nelson Lagoon, Alaska
  14. 5.2 37 km NW of Nelson Lagoon, Alaska
  15. 2.9 36 km WNW 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.

On USGS

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