QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

76 km N of Arctic Village, Alaska

· 3.5 km deep · released about 170 lb 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 2.5 (ml)
Depth
3.5 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 652 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 68.8133, -145.4969. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.0 49 km N of Arctic Village, Alaska
  2. 2.7 57 km NNE of Arctic Village, Alaska
  3. 2.2 78 km N of Arctic Village, Alaska
  4. 2.9 76 km N of Arctic Village, Alaska
  5. 3.1 69 km N of Arctic Village, Alaska
  6. 2.2 62 km N of Arctic Village, Alaska
  7. 1.7 76 km N of Arctic Village, Alaska
  8. 1.6 64 km NNE of Arctic Village, Alaska
  9. 1.9 63 km NNE of Arctic Village, Alaska
  10. 1.6 108 km N of Arctic Village, Alaska
  11. 1.9 75 km N of Arctic Village, Alaska
  12. 1.5 77 km N of Arctic Village, Alaska
  13. 1.6 75 km NNE of Arctic Village, Alaska
  14. 1.9 76 km N of Arctic Village, Alaska
  15. 1.8 80 km N of Arctic Village, 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.