QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7ml

73 km WNW of Elfin Cove, Alaska

· 14 km deep · released about 5.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hoonah-Angoon Census Area 95 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 3.7 (ml)
Depth
14 km below the surface
Felt
1 report · strongest reported intensity II
Measured shaking
intensity II (ShakeMap)
Nearest
Hoonah-Angoon Census Area, 95 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2451 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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 58.4194, -137.5137. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hoonah-Angoon Census Area, AK 95 km (59 mi) W of here earthquakes near Hoonah-Angoon Census Area
Haines Borough, AK 135 km (84 mi) WSW of here earthquakes near Haines Borough

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

Aftershocks so far

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

  1. 2.4 53 km NW of Elfin Cove, Alaska
  2. 2.4 58 km WNW of Elfin Cove, Alaska
  3. 2.3 48 km NW of Elfin Cove, Alaska
  4. 2.6 55 km WNW of Elfin Cove, Alaska
  5. 2.3 55 km NW of Elfin Cove, Alaska
  6. 2.3 56 km WNW of Elfin Cove, Alaska
  7. 2.5 51 km NW of Elfin Cove, Alaska
  8. 2.4 53 km NW of Elfin Cove, Alaska
  9. 2.3 Southeastern Alaska
  10. 2.4 50 km NW of Elfin Cove, Alaska
  11. 2.3 52 km NW of Elfin Cove, Alaska
  12. 2.4 52 km NW of Elfin Cove, Alaska
  13. 2.3 52 km NW of Elfin Cove, Alaska
  14. 2.3 53 km NW of Elfin Cove, Alaska
  15. 2.3 52 km NW of Elfin Cove, 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.