QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

119 km ESE of Yakutat, Alaska

· 4.3 km deep · released about 1.3 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 3.3 (ml)
Depth
4.3 km below the surface
Felt
no reports yet
Measured shaking
intensity IV (ShakeMap)
Nearest
Hoonah-Angoon Census Area, 136 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 969 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 58.9842, -137.9492. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hoonah-Angoon Census Area, AK 136 km (84 mi) WNW of here earthquakes near Hoonah-Angoon Census Area

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

Aftershocks so far

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

  1. 3.3 113 km ESE of Yakutat, Alaska
  2. 1.7 86 km WSW of Covenant Life, Alaska
  3. 2.3 116 km WSW of Covenant Life, Alaska
  4. 2.5 113 km WSW of Covenant Life, Alaska
  5. 2.0 97 km NW of Elfin Cove, Alaska
  6. 1.7 95 km NW of Elfin Cove, Alaska
  7. 2.4 94 km NW of Elfin Cove, Alaska
  8. 2.2 100 km WNW of Elfin Cove, Alaska
  9. 1.5 104 km WSW of Covenant Life, Alaska
  10. 2.0 112 km ESE of Yakutat, Alaska
  11. 1.8 112 km ESE of Yakutat, Alaska
  12. 3.6 113 km ESE of Yakutat, Alaska
  13. 2.8 112 km ESE of Yakutat, Alaska
  14. 2.5 85 km ESE of Yakutat, Alaska
  15. 2.0 112 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2021-02-08 — it released about 32 times the energy of this one.

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

On USGS

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