QuakeIndex

Earthquake · reviewed by a seismologist

M 4.5ml

15 km NNW of Four Mile Road, Alaska

· 20 km deep · released about 85 tons of TNT

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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 4.5 (ml)
Depth
20 km below the surface
Felt
235 reports · strongest reported intensity IV
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Nearest
Denali Borough, 124 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2589 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 235 people have reported feeling it to USGS.

How big was it?

This earthquake released about 85 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 89× the energy of this one
  3. Magna, Utah 2020 M 5.7 63× the energy of this one
  4. This earthquake M 4.5 about 85 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 180× 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 64.7347, -149.1893. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Denali Borough, AK 124 km (77 mi) NNE of here earthquakes near Denali Borough
Yukon-Koyukuk Census Area, AK 133 km (82 mi) ESE of here earthquakes near Yukon-Koyukuk Census Area

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. 1.7 30 km SSE of Minto, Alaska
  2. 2.3 11 km NNE of Four Mile Road, Alaska
  3. 2.1 13 km SE of Minto, Alaska
  4. 1.7 20 km NNE of Four Mile Road, Alaska
  5. 1.8 20 km NNE of Four Mile Road, Alaska
  6. 1.7 34 km NNE of Four Mile Road, Alaska
  7. 2.0 21 km NNE of Four Mile Road, Alaska
  8. 1.8 21 km NNE of Four Mile Road, Alaska
  9. 2.3 11 km E of Nenana, Alaska
  10. 1.6 20 km NNE of Four Mile Road, Alaska
  11. 3.3 Central Alaska
  12. 1.6 17 km N of Four Mile Road, Alaska
  13. 1.7 13 km W of Four Mile Road, Alaska
  14. 1.8 23 km SSE of Minto, Alaska
  15. 1.7 26 km SSE of Minto, 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.