QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

31 km SSE of Mud Bay, Alaska

· 15 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Haines Borough 33 kmHoonah-Angoon Census Area 69 kmSkagway Municipality 75 kmJuneau 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 1.5 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Haines Borough, 33 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1756 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 58.8956, -135.1621. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Haines Borough, AK 33 km (20 mi) SE of here earthquakes near Haines Borough
Hoonah-Angoon Census Area, AK 69 km (43 mi) NE of here earthquakes near Hoonah-Angoon Census Area
Skagway Municipality, AK 75 km (46 mi) S of here earthquakes near Skagway Municipality
Juneau City and Borough, AK 81 km (51 mi) NW 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

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

  1. 3.5 26 km E of Mud Bay, Alaska
  2. 3.0 45 km SE of Mud Bay, Alaska
  3. 1.7 30 km NNE of Excursion Inlet, Alaska
  4. 1.8 45 km SE of Mud Bay, Alaska
  5. 1.5 3 km SSW of Mud Bay, Alaska
  6. 3.0 5 km WSW of Haines, Alaska
  7. 1.9 25 km S of Mud Bay, Alaska
  8. 1.5 40 km ESE of Mud Bay, Alaska
  9. 1.6 22 km S of Mud Bay, Alaska
  10. 1.8 37 km ESE of Mud Bay, Alaska
  11. 2.0 25 km SSE of Mud Bay, Alaska
  12. 1.8 Southeastern Alaska
  13. 1.9 Southeastern Alaska
  14. 2.3 27 km SSE of Mud Bay, Alaska
  15. 1.8 49 km NNW of Juneau, 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.