QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

45 km ENE of Yakutat, Alaska

· 16 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yakutat City and Borough 81 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 3.6 (ml)
Depth
16 km below the surface
Felt
2 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Yakutat City and Borough, 81 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 507 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.9× 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 59.7714, -139.0452. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakutat City and Borough, AK 81 km (50 mi) ESE 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

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

  1. 2.4 37 km NE of Yakutat, Alaska
  2. 2.2 60 km NNE of Yakutat, Alaska
  3. 2.3 42 km E of Yakutat, Alaska
  4. 2.3 63 km NNE of Yakutat, Alaska
  5. 2.0 38 km NE of Yakutat, Alaska
  6. 3.6 40 km NE of Yakutat, Alaska
  7. 1.8 80 km NNE of Yakutat, Alaska
  8. 2.1 21 km ESE of Yakutat, Alaska
  9. 1.8 29 km NNE of Yakutat, Alaska
  10. 2.3 56 km NNE of Yakutat, Alaska
  11. 1.9 66 km NNE of Yakutat, Alaska
  12. 1.9 49 km NNE of Yakutat, Alaska
  13. 2.0 42 km NNE of Yakutat, Alaska
  14. 1.9 54 km NNE of Yakutat, Alaska
  15. 1.8 52 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.2 on 2020-11-16 — it released about 7.9 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.