QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8ml

34 km NNE of Paxson, Alaska

· 5.0 km deep · released about 7.7 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 3.8 (ml)
Depth
5.0 km below the surface
Felt
1 report · strongest reported intensity II
Measured shaking
intensity IV (ShakeMap)
Nearest
Southeast Fairbanks Census Area, 121 km ENE
Nearest mapped fault
Denali fault, 8 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 221 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 7.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 980× the energy of this one
  3. Magna, Utah 2020 M 5.7 700× the energy of this one
  4. This earthquake M 3.8 about 7.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 63.3878, -145.4157. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Southeast Fairbanks Census Area, AK 121 km (75 mi) WSW 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

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

  1. 1.7 32 km NNE of Paxson, Alaska
  2. 2.0 40 km SSW of Dry Creek, Alaska
  3. 2.4 38 km SSW of Dry Creek, Alaska
  4. 2.6 36 km SSW of Dry Creek, Alaska
  5. 2.2 37 km SSW of Dry Creek, Alaska
  6. 1.6 29 km N of Paxson, Alaska
  7. 1.9 30 km N of Paxson, Alaska
  8. 2.2 38 km SSW of Dry Creek, Alaska
  9. 1.5 38 km NE of Paxson, Alaska
  10. 1.6 33 km SSW of Dry Creek, Alaska
  11. 2.1 31 km NE of Paxson, Alaska
  12. 1.6 31 km ENE of Paxson, Alaska
  13. 1.8 33 km SSW of Dry Creek, Alaska
  14. 1.6 39 km NE of Paxson, Alaska
  15. 1.5 29 km N of Paxson, 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.