QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

17 km E of McKinley Park, Alaska

· 89 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Denali Borough 73 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
89 km below the surface
Felt
no reports yet
Nearest
Denali Borough, 73 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2151 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 63.7302, -148.5583. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Denali Borough, AK 73 km (45 mi) E of here earthquakes near Denali Borough
Fairbanks North Star Borough, AK 145 km (90 mi) SW of here earthquakes near Fairbanks North Star 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. 1.5 10 km NNE of Healy, Alaska
  2. 2.7 12 km NNE of Healy, Alaska
  3. 3.0 9 km ESE of Ferry, Alaska
  4. 1.6 12 km NE of Healy, Alaska
  5. 3.7 11 km ESE of Ferry, Alaska
  6. 2.3 8 km SE of Ferry, Alaska
  7. 2.1 9 km ESE of Ferry, Alaska
  8. 1.5 14 km NE of Healy, Alaska
  9. 1.7 5 km SSE of Healy, Alaska
  10. 2.1 4 km SE of Healy, Alaska
  11. 2.1 2 km SE of Healy, Alaska
  12. 1.9 16 km E of Ferry, Alaska
  13. 1.7 5 km WNW of Healy, Alaska
  14. 1.5 23 km ENE of McKinley Park, Alaska
  15. 1.5 25 km ENE of Healy, 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 4.6 on 2018-01-19 — it released about 45,000 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.