QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

24 km SSE of Skwentna, Alaska

· 77 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Matanuska-Susitna Borough 106 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
77 km below the surface
Felt
no reports yet
Nearest
Matanuska-Susitna Borough, 106 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1154 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 61.7775, -151.2580. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Matanuska-Susitna Borough, AK 106 km (66 mi) WSW of here earthquakes near Matanuska-Susitna Borough
Anchorage Municipality, AK 124 km (77 mi) WNW of here earthquakes near Anchorage Municipality

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. 1.5 47 km SSW of Skwentna, Alaska
  2. 1.7 13 km W of Susitna, Alaska
  3. 1.5 34 km S of Skwentna, Alaska
  4. 1.8 29 km E of Skwentna, Alaska
  5. 2.1 43 km SSW of Skwentna, Alaska
  6. 2.8 37 km S of Skwentna, Alaska
  7. 1.6 37 km S of Skwentna, Alaska
  8. 1.8 19 km E of Skwentna, Alaska
  9. 1.6 34 km W of Susitna, Alaska
  10. 1.5 22 km WNW of Susitna, Alaska
  11. 1.5 22 km NNW of Susitna, Alaska
  12. 1.6 19 km NNE of Skwentna, Alaska
  13. 1.9 37 km S of Skwentna, Alaska
  14. 1.8 11 km N of Skwentna, Alaska
  15. 1.9 22 km NW of Susitna, 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.