QuakeIndex

Earthquake · reviewed by a seismologist

M 6.6mww

80 km ENE of Tadine, New Caledonia

· 10 km deep · released about 120 kilotons 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 6.6 (mww)
Depth
10 km below the surface
Felt
11 reports · strongest reported intensity VII
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1 hour ago

This was a strong earthquake. Damage is likely near the epicentre and it is felt over a wide area. 11 people have reported feeling it to USGS.

How big was it?

This earthquake released about 120 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.6 would have released about 32 times as much.

  1. Ridgecrest, California 2019 M 7.1 5.6× the energy of this one
  2. Loma Prieta, California 1989 M 6.9 2.8× the energy of this one
  3. Northridge, California 1994 M 6.7 1.4× the energy of this one
  4. This earthquake M 6.6 about 120 kilotons of TNT
  5. Mineral, Virginia 2011 M 5.8 this one released 16× more
  6. Magna, Utah 2020 M 5.7 this one released 22× 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 -21.2982, 168.6100. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 5.1 90 km ENE of Tadine, New Caledonia
  2. 5.0 61 km ENE of Tadine, New Caledonia
  3. 4.8 74 km ENE of Tadine, New Caledonia
  4. 4.8 72 km E of Tadine, New Caledonia
  5. 5.1 74 km ENE of Tadine, New Caledonia
  6. 4.8 86 km NE of Tadine, New Caledonia
  7. 5.2 58 km NE of Tadine, New Caledonia
  8. 5.0 76 km NE of Tadine, New Caledonia
  9. 4.7 73 km ENE of Tadine, New Caledonia
  10. 4.9 73 km ENE of Tadine, New Caledonia
  11. 4.8 78 km ENE of Tadine, New Caledonia
  12. 4.8 97 km NE of Tadine, New Caledonia
  13. 4.7 71 km ENE of Tadine, New Caledonia
  14. 4.7 97 km NE of Tadine, New Caledonia
  15. 5.0 78 km ENE of Tadine, New Caledonia

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.