QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

47 km ESE of Hobart Bay, Alaska

· 2.5 km deep · released about 950 lb of TNT

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10 km30 km60 km120 km N Petersburg Borough 39 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 3.0 (ml)
Depth
2.5 km below the surface
Felt
no reports yet
Nearest
Petersburg Borough, 39 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2488 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 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 lb of TNT

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 57.3808, -132.5828. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Petersburg Borough, AK 39 km (24 mi) NE of here earthquakes near Petersburg Borough
Juneau City and Borough, AK 145 km (90 mi) SE of here earthquakes near Juneau City and Borough

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

Aftershocks so far

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

  1. 2.2 27 km ENE of Hobart Bay, Alaska
  2. 1.8 40 km NE of Hobart Bay, Alaska
  3. 1.5 41 km ENE of Hobart Bay, Alaska
  4. 1.7 31 km E of Hobart Bay, Alaska
  5. 1.7 35 km E of Hobart Bay, Alaska
  6. 2.0 31 km E of Hobart Bay, Alaska
  7. 2.3 51 km E of Hobart Bay, Alaska
  8. 2.2 41 km E of Hobart Bay, Alaska
  9. 1.6 59 km NE of Hobart Bay, Alaska
  10. 1.9 Southeastern Alaska
  11. 1.6 61 km ENE of Hobart Bay, Alaska
  12. 1.6 44 km ENE of Hobart Bay, Alaska
  13. 1.9 46 km ENE of Hobart Bay, Alaska
  14. 1.9 37 km NE of Petersburg, Alaska
  15. 1.6 37 km NE of Hobart Bay, 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.