QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

89 km W of Elfin Cove, Alaska

· 13 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hoonah-Angoon Census Area 117 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 3.1 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Hoonah-Angoon Census Area, 117 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1912 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 58.2571, -137.8617. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hoonah-Angoon Census Area, AK 117 km (72 mi) W of here earthquakes near Hoonah-Angoon Census Area

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

Aftershocks so far

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

  1. 2.1 93 km W of Elfin Cove, Alaska
  2. 1.9 82 km W of Elfin Cove, Alaska
  3. 1.7 113 km W of Elfin Cove, Alaska
  4. 2.4 85 km W of Elfin Cove, Alaska
  5. 1.7 89 km W of Elfin Cove, Alaska
  6. 1.7 64 km WSW of Elfin Cove, Alaska
  7. 1.8 71 km W of Elfin Cove, Alaska
  8. 2.1 94 km W of Elfin Cove, Alaska
  9. 1.8 66 km W of Elfin Cove, Alaska
  10. 2.4 86 km WSW of Elfin Cove, Alaska
  11. 2.4 96 km W of Elfin Cove, Alaska
  12. 2.0 89 km WNW of Elfin Cove, Alaska
  13. 1.6 89 km NW of Elfin Cove, Alaska
  14. 2.1 70 km WSW of Elfin Cove, Alaska
  15. 2.4 72 km WSW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.1 on 2019-12-18 — it released about 1,000 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.