QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7ml

18 km NE of Yakutat, Alaska

· 21 km deep · released about 5.4 tons of TNT

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10 km30 km60 km120 km N Yakutat City and Borough 66 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 3.7 (ml)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Yakutat City and Borough, 66 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2185 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 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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 59.6594, -139.4746. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakutat City and Borough, AK 66 km (41 mi) SE of here earthquakes near Yakutat City and Borough

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

Aftershocks so far

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

  1. 1.5 45 km NNE of Yakutat, Alaska
  2. 2.6 17 km NE of Yakutat, Alaska
  3. 1.6 37.9 km SSW of Yakutat, AK
  4. 2.6 31 km NNE of Yakutat, Alaska
  5. 1.5 45 km NNE of Yakutat, Alaska
  6. 1.6 47 km NNE of Yakutat, Alaska
  7. 1.5 51 km NNE of Yakutat, Alaska
  8. 1.6 42 km N of Yakutat, Alaska
  9. 1.5 53 km NNE of Yakutat, Alaska
  10. 1.7 45 km ENE of Yakutat, Alaska
  11. 3.5 46 km E of Yakutat, Alaska
  12. 1.5 48 km NNE of Yakutat, Alaska
  13. 1.5 45 km ENE of Yakutat, Alaska
  14. 1.7 50 km NNE of Yakutat, Alaska
  15. 1.7 50 km NNE of Yakutat, 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.