QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

112 km ESE of Yakutat, Alaska

· 5.2 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N
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
5.2 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2521 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 59.0244, -138.0418. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 1.5 84 km E of Yakutat, Alaska
  2. 3.4 82 km ESE of Yakutat, Alaska
  3. 2.4 85 km E of Yakutat, Alaska
  4. 4.3 83 km ESE of Yakutat, Alaska
  5. 2.8 84 km E of Yakutat, Alaska
  6. 3.2 110 km ESE of Yakutat, Alaska
  7. 2.5 92 km NW of Elfin Cove, Alaska
  8. 1.8 102 km NW of Elfin Cove, Alaska
  9. 2.3 118 km WNW of Elfin Cove, Alaska
  10. 2.1 90 km ESE of Yakutat, Alaska
  11. 1.8 102 km ESE of Yakutat, Alaska
  12. 2.2 108 km NW of Elfin Cove, Alaska
  13. 2.5 117 km SE of Yakutat, Alaska
  14. 2.9 98 km NW of Elfin Cove, Alaska
  15. 1.8 British Columbia, Canada

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.