QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

38 km NE of Larsen Bay, Alaska

· 45 km deep · released about 1,900 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kodiak Island Borough 23 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 3.2 (ml)
Depth
45 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Kodiak Island Borough, 23 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1511 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× 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 57.8072, -153.5728. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kodiak Island Borough, AK 23 km (15 mi) ENE of here earthquakes near Kodiak Island 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 45 km N of Larsen Bay, Alaska
  2. 1.5 37 km WSW of Port Lions, Alaska
  3. 1.6 14 km SW of Port Lions, Alaska
  4. 1.5 38.9 km E of Aleneva, AK
  5. 1.6 24 km WNW of Port Lions, Alaska
  6. 1.6 33 km WSW of Port Lions, Alaska
  7. 2.6 32 km NE of Larsen Bay, Alaska
  8. 1.5 17 km SE of Larsen Bay, Alaska
  9. 3.0 34 km W of Aleneva, Alaska
  10. 4.1 36 km NE of Larsen Bay, Alaska
  11. 1.8 17 km WSW of Aleneva, Alaska
  12. 1.5 38 km NNE of Larsen Bay, Alaska
  13. 1.5 65 km N of Larsen Bay, Alaska
  14. 1.7 27 km NE of Larsen Bay, Alaska
  15. 1.9 24 km WNW of Port Lions, 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.