QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

56 km N of Juneau, Alaska

Yes. A magnitude 1.5 earthquake was recorded 56 km N of Juneau, Alaska, at 8:45 pm AKDT on 29 June 2024 (04:45 UTC), 8.3 km deep.

· 8.3 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Juneau City and Borough 52 kmHaines Borough 68 kmHoonah-Angoon Census Area 90 kmSkagway Municipality 96 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
8.3 km below the surface
Felt
no reports yet
Nearest
Juneau City and Borough, 52 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 828 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 6 km (4 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

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.

For this area

The largest earthquake within 50 km since 2016 was M 4.2 on 2022-10-10 — about 11,000 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.0 23 km SSE of Mud Bay, Alaska · 44 km WNW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 58.8032, -134.5345. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Juneau City and Borough, AK 52 km (32 mi) SSE earthquakes near Juneau City and Borough
Haines Borough, AK 68 km (42 mi) WNW earthquakes near Haines Borough
Hoonah-Angoon Census Area, AK 90 km (56 mi) WSW earthquakes near Hoonah-Angoon Census Area
Skagway Municipality, AK 96 km (60 mi) NNW earthquakes near Skagway Municipality

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

Aftershocks so far

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

  1. 2.8 60 km N of Juneau, Alaska
  2. 3.5 26 km E of Mud Bay, Alaska
  3. 3.0 45 km SE of Mud Bay, Alaska
  4. 1.8 45 km SE of Mud Bay, Alaska
  5. 2.4 56 km N of Juneau, Alaska
  6. 2.6 56 km N of Juneau, Alaska
  7. 2.3 58 km N of Juneau, Alaska
  8. 2.8 58 km N of Juneau, Alaska
  9. 2.0 70 km ESE of Mud Bay, Alaska
  10. 2.1 64 km ESE of Mud Bay, Alaska
  11. 1.8 66 km ESE of Mud Bay, Alaska
  12. 2.1 51 km N of Juneau, Alaska
  13. 3.3 48 km ESE of Mud Bay, Alaska
  14. 1.5 40 km ESE of Mud 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.