QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3mw

9 km NE of Noatak, Alaska

· 14 km deep · released about 43 tons of TNT

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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 4.3 (mw)
Depth
14 km below the surface
Felt
no reports yet
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
Northwest Arctic Borough, 140 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1155 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

How big was it?

This earthquake released about 43 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 4,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 180× the energy of this one
  3. Magna, Utah 2020 M 5.7 130× the energy of this one
  4. This earthquake M 4.3 about 43 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 89× 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 67.6364, -162.8356. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Northwest Arctic Borough, AK 140 km (87 mi) WNW of here earthquakes near Northwest Arctic Borough

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

Aftershocks so far

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

  1. 1.8 22 km ENE of Noatak, Alaska
  2. 1.7 28 km E of Noatak, Alaska
  3. 2.1 29 km ENE of Noatak, Alaska
  4. 2.8 12 km NE of Noatak, Alaska
  5. 1.5 13 km W of Noatak, Alaska
  6. 1.5 12 km NW of Noatak, Alaska
  7. 3.2 12 km NW of Noatak, Alaska
  8. 1.5 0 km W of Red Dog Mine, Alaska
  9. 1.5 27 km ENE of Noatak, Alaska
  10. 2.2 22 km S of Red Dog Mine, Alaska
  11. 2.0 31 km SSW of Noatak, Alaska
  12. 1.6 20 km S of Red Dog Mine, Alaska
  13. 2.1 10 km NE of Noatak, Alaska
  14. 1.9 15 km WNW of Noatak, Alaska
  15. 2.5 25 km NW of Noatak, 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 4.2 on 2016-03-05.

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

On USGS

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