QuakeIndex

Earthquake · reviewed by a seismologist

M 6.3mb

170 km NW of Port-Olry, Vanuatu

Yes. A magnitude 6.3 earthquake was recorded 170 km NW of Port-Olry, Vanuatu at 02:35 UTC on 2026-10-24, 10 km deep.

· 10 km deep · released about 43 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 6.3 (mb)
Depth
10 km below the surface
Felt
no reports yet
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 29 hours ago

This was a strong earthquake. Damage is likely near the epicentre and it is felt over a wide area.

At this magnitude and depth, people at rest would likely notice it out to about 408 km (254 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 43 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.3 would have released about 32 times as much.

  1. Ridgecrest, California 2019 M 7.1 16× the energy of this one
  2. Loma Prieta, California 1989 M 6.9 7.9× the energy of this one
  3. Northridge, California 1994 M 6.7 4× the energy of this one
  4. This earthquake M 6.3 about 43 kilotons of TNT
  5. Mineral, Virginia 2011 M 5.8 this one released 5.6× more
  6. Magna, Utah 2020 M 5.7 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.9 on 2026-10-24 — about 7.9 times the energy of this one.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre -14.0424, 165.8666. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 5.1 161 km WNW of Port-Olry, Vanuatu
  2. 5.1 166 km WNW of Port-Olry, Vanuatu
  3. 5.0 192 km NW of Port-Olry, Vanuatu
  4. 4.8 203 km NW of Port-Olry, Vanuatu
  5. 5.0 210 km NW of Port-Olry, Vanuatu
  6. 5.0 193 km NW of Port-Olry, Vanuatu
  7. 4.8 153 km NW of Port-Olry, Vanuatu
  8. 4.9 217 km NW of Port-Olry, Vanuatu
  9. 4.8 215 km NW of Port-Olry, Vanuatu
  10. 4.8 216 km NW of Port-Olry, Vanuatu
  11. 4.9 196 km W of Sola, Vanuatu
  12. 4.9 169 km NW of Port-Olry, Vanuatu
  13. 5.9 196 km NW of Port-Olry, Vanuatu
  14. 4.7 187 km NW of Port-Olry, Vanuatu
  15. 5.1 209 km NW of Port-Olry, Vanuatu

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.

Revisions

USGS refines a solution as more stations report. Every change we have seen is listed here.

What changedFromToWhen
impact alertnot reportedgreen
measured intensitynot reported4.46

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.