QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

13 km SW of Fort Greely, Alaska

· 15 km deep · released about 1.9 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fairbanks North Star Borough 97 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 3.4 (ml)
Depth
15 km below the surface
Felt
19 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
Nearest
Fairbanks North Star Borough, 97 km NNW
Nearest mapped fault
Northern Foothills thrust fault (Northern Foothills fold and thrust belt), under 1 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 1577 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 19 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4× 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 63.8588, -145.7845. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fairbanks North Star Borough, AK 97 km (60 mi) SSE 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

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

  1. 1.6 18 km NE of Fort Greely, Alaska
  2. 1.8 48 km SW of Fort Greely, Alaska
  3. 1.5 8 km NE of Big Delta, Alaska
  4. 2.0 52 km NNW of Paxson, Alaska
  5. 1.6 29 km WSW of Delta Junction, Alaska
  6. 1.7 9 km SSW of Fort Greely, Alaska
  7. 1.7 12 km WSW of Fort Greely, Alaska
  8. 2.3 15 km WSW of Fort Greely, Alaska
  9. 1.6 16 km NNW of Whitestone, Alaska
  10. 1.5 15 km WSW of Fort Greely, Alaska
  11. 1.5 52 km NNW of Paxson, Alaska
  12. 1.6 1 km SSE of Whitestone, Alaska
  13. 2.2 46 km SW of Fort Greely, Alaska
  14. 1.9 51 km SW of Fort Greely, Alaska
  15. 2.6 49 km SW 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.