QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2ml

109 km WNW of Yakutat, Alaska

· 0.6 km deep · released about 30 tons of TNT

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10 km30 km60 km120 km N Yakutat City and Borough 70 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 4.2 (ml)
Depth
0.6 km below the surface
Felt
no reports yet
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Yakutat City and Borough, 70 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2683 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 30 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 5,600× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 250× the energy of this one
  3. Magna, Utah 2020 M 5.7 180× the energy of this one
  4. This earthquake M 4.2 about 30 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 63× 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 59.8048, -141.6003. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakutat City and Borough, AK 70 km (44 mi) WSW 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

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

  1. 1.6 Southeastern Alaska
  2. 1.5 112 km WNW of Yakutat, Alaska
  3. 1.5 111 km WNW of Yakutat, Alaska
  4. 1.6 112 km WNW of Yakutat, Alaska
  5. 1.7 Southeastern Alaska
  6. 1.5 111 km WNW of Yakutat, Alaska
  7. 1.5 109 km WNW of Yakutat, Alaska
  8. 1.6 115 km WNW of Yakutat, Alaska
  9. 2.0 113 km W of Yakutat, Alaska
  10. 1.8 111 km WNW of Yakutat, Alaska
  11. 2.5 113 km WNW of Yakutat, Alaska
  12. 3.3 116 km WNW of Yakutat, Alaska
  13. 1.5 114 km WNW of Yakutat, Alaska
  14. 1.5 114 km WNW of Yakutat, Alaska
  15. 1.5 113 km WNW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2016-12-26.

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

On USGS

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