QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

20 km SSW of South Van Horn, Alaska

· 20 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Fairbanks North Star Borough 70 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 1.9 (ml)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Fairbanks North Star Borough, 70 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2615 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 64.6410, -147.9703. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fairbanks North Star Borough, AK 70 km (44 mi) W of here earthquakes near Fairbanks North Star Borough
Denali Borough, AK 146 km (91 mi) NE of here earthquakes near Denali Borough

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

Aftershocks so far

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

  1. 2.6 55 km E of Clear, Alaska, Alaska
  2. 2.1 53 km E of Clear, Alaska, Alaska
  3. 1.6 26 km S of South Van Horn, Alaska
  4. 1.5 12 km W of Ester, Alaska
  5. 1.7 41 km SSW of South Van Horn, Alaska
  6. 1.7 4 km SE of Badger, Alaska
  7. 2.4 10 km SSW of Ester, Alaska
  8. 1.9 35 km SSW of South Van Horn, Alaska
  9. 1.5 55 km WSW of Salcha, Alaska
  10. 1.5 7 km ENE of Fox, Alaska
  11. 1.5 9 km SSW of Ester, Alaska
  12. 2.2 37 km WSW of Salcha, Alaska
  13. 2.1 11 km SSW of Ester, Alaska
  14. 1.7 5 km ESE of Fox, Alaska
  15. 1.6 14 km S of Ester, 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.