QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

46 km W of Arctic Village, Alaska

· 1.1 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N
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 3.6 (ml)
Depth
1.1 km below the surface
Felt
no reports yet
Measured shaking
intensity IV (ShakeMap)
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1983 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 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.9× 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 68.1048, -146.6447. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 1.6 81 km WSW of Arctic Village, Alaska
  2. 1.7 71 km NW of Arctic Village, Alaska
  3. 2.1 64 km WNW of Arctic Village, Alaska
  4. 1.9 48 km SW of Arctic Village, Alaska
  5. 1.6 53 km SW of Arctic Village, Alaska
  6. 1.7 41 km WSW of Arctic Village, Alaska
  7. 1.7 43 km WSW of Arctic Village, Alaska
  8. 1.5 40 km WSW of Arctic Village, Alaska
  9. 1.5 46 km W of Arctic Village, Alaska
  10. 2.4 47 km W of Arctic Village, Alaska
  11. 1.8 48 km WSW of Arctic Village, Alaska
  12. 1.5 41 km WSW of Arctic Village, Alaska
  13. 1.7 73 km NW of Arctic Village, Alaska
  14. 2.0 75 km WNW of Arctic Village, Alaska
  15. 1.5 75 km WNW 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.