QuakeIndex

landslide · reviewed by a seismologist

M 5.4mww

44 km NNE of Hobart Bay, Alaska

· 0.0 km deep · released about 1.9 kilotons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Petersburg Borough 81 kmJuneau City and Borough 87 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 5.4 (mww)
Depth
0.0 km below the surface
Felt
no reports yet
Measured shaking
intensity VI (ShakeMap)
Nearest
Petersburg Borough, 81 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 338 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre.

USGS catalogues this as landslide, not an earthquake.

How big was it?

This earthquake released about 1.9 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4× the energy of this one
  3. Magna, Utah 2020 M 5.7 2.8× the energy of this one
  4. This earthquake M 5.4 about 1.9 kilotons of TNT
  5. Around the size people start to feel M 3.0 this one released 4,000× 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 57.8400, -133.0900. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Petersburg Borough, AK 81 km (50 mi) N of here earthquakes near Petersburg Borough
Juneau City and Borough, AK 87 km (54 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

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

  1. 2.2 27 km ENE of Hobart Bay, Alaska
  2. 1.6 50 km NNE of Hobart Bay, Alaska
  3. 1.9 41 km NNE of Hobart Bay, Alaska
  4. 1.8 40 km NE of Hobart Bay, Alaska
  5. 1.5 47 km NNE of Hobart Bay, Alaska
  6. 1.5 41 km ENE of Hobart Bay, Alaska
  7. 1.6 47 km NNE 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.