QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

54 km NW of Gustavus, Alaska

· 8.9 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Haines Borough 50 kmHoonah-Angoon Census Area 51 kmSkagway Municipality 98 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
8.9 km below the surface
Felt
no reports yet
Nearest
Haines Borough, 50 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 884 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 58.8170, -136.2579. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Haines Borough, AK 50 km (31 mi) SW of here earthquakes near Haines Borough
Hoonah-Angoon Census Area, AK 51 km (32 mi) NNW of here earthquakes near Hoonah-Angoon Census Area
Skagway Municipality, AK 98 km (61 mi) SSW of here earthquakes near Skagway Municipality
Juneau City and Borough, AK 130 km (81 mi) WNW 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

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

  1. 2.0 35 km SW of Covenant Life, Alaska
  2. 3.1 48 km SSW of Covenant Life, Alaska
  3. 2.8 48 km SSW of Covenant Life, Alaska
  4. 3.0 32 km SSW of Covenant Life, Alaska
  5. 2.3 50 km NNW of Elfin Cove, Alaska
  6. 2.9 40 km WSW of Haines, Alaska
  7. 1.8 67 km NNW of Elfin Cove, Alaska
  8. 2.9 73 km SSW of Covenant Life, Alaska
  9. 2.0 70 km SW of Covenant Life, Alaska
  10. 1.8 59 km SSW of Covenant Life, Alaska
  11. 1.8 52 km NNW of Elfin Cove, Alaska
  12. 1.8 59 km SW of Covenant Life, Alaska
  13. 3.6 75 km SSW of Covenant Life, Alaska
  14. 2.1 45 km SW of Covenant Life, Alaska
  15. 1.7 73 km NW of Gustavus, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.3 on 2023-10-28 — it released about 500,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.