QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

6 km S of Fort Greely, Alaska

· 18 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fairbanks North Star Borough 99 kmSoutheast Fairbanks Census Area 114 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
18 km below the surface
Felt
no reports yet
Nearest
Fairbanks North Star Borough, 99 km NNW
Nearest mapped fault
Granite Mountain fault (Northern Foothills fold and thrust belt), 7 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 585 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 63.8834, -145.5506. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fairbanks North Star Borough, AK 99 km (61 mi) SSE of here earthquakes near Fairbanks North Star Borough
Southeast Fairbanks Census Area, AK 114 km (71 mi) W of here earthquakes near Southeast Fairbanks Census Area

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

Aftershocks so far

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

  1. 1.6 18 km NE of Fort Greely, Alaska
  2. 1.5 8 km NE of Big Delta, Alaska
  3. 1.7 9 km SSW of Fort Greely, Alaska
  4. 1.7 12 km WSW of Fort Greely, Alaska
  5. 2.3 15 km WSW of Fort Greely, Alaska
  6. 1.5 15 km WSW of Fort Greely, Alaska
  7. 1.6 1 km SSE of Whitestone, Alaska
  8. 2.0 27 km NW of Healy Lake, Alaska
  9. 2.0 5 km WSW of Fort Greely, Alaska
  10. 1.5 43 km WSW of Dry Creek, Alaska
  11. 1.7 3 km SW of Fort Greely, Alaska
  12. 1.6 32 km WSW of Dry Creek, Alaska
  13. 1.9 31 km WSW of Dry Creek, Alaska
  14. 1.9 10 km SSW of Fort Greely, Alaska
  15. 2.2 6 km SSW of Fort Greely, 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.