QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

114 km ESE of Yakutat, Alaska

· 7.7 km deep · released about 1,300 lb 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 3.1 (ml)
Depth
7.7 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2610 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 59.0147, -138.0127. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 1.8 102 km NW of Elfin Cove, Alaska
  2. 2.3 118 km WNW of Elfin Cove, Alaska
  3. 2.1 90 km ESE of Yakutat, Alaska
  4. 1.8 102 km ESE of Yakutat, Alaska
  5. 2.2 108 km NW of Elfin Cove, Alaska
  6. 2.5 117 km SE of Yakutat, Alaska
  7. 2.9 98 km NW of Elfin Cove, Alaska
  8. 1.8 British Columbia, Canada
  9. 1.6 108 km ESE of Yakutat, Alaska
  10. 1.6 113 km ESE of Yakutat, Alaska
  11. 1.9 100 km WSW of Covenant Life, Alaska
  12. 1.5 82.6 km ENE of Mosquito Lake, AK
  13. 1.5 117.5 km WNW of Yakutat, AK
  14. 3.5 92 km NW of Elfin Cove, Alaska
  15. 1.6 81 km ESE 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.