Update: Seismic activity on Oct. 20 – 6.3 magnitude earthquake near Port-Olry, Vanuatu recorded

Published Oct 20, 2026

EAST SANTO, Sanma Province — A 6.3 magnitude quake occurred close to Port-Olry on Tuesday afternoon, the U.S. Geological Survey reported.

The tremor slammed at 04:20 UTC (15:20 local time), with its epicenter about 197 km northwest of Port-Olry and a depth of 16 km. Seismologists first reported it as a 6.6 event, but later downgraded it to 6.3.

Did you feel it?

If you noticed the earthquake, you can share your experience using the USGS Felt Report form.

Impact and estimated losses

The USGS categorized this as a Green Alert, which means there is a low likelihood of casualties and damage. Recent earthquakes in this area have caused secondary hazards such as landslides that might have contributed to losses.

Structure information summary

Overall, the population in this region resides in structures that are highly vulnerable to earthquake shaking, though some resistant structures exist. The predominant vulnerable building types are unknown/miscellaneous types and wood construction.

Tremors last week

13 tremors with a magnitude 2.5 or above have been registered in the region during the past week, three of them larger than magnitude 5.5. The most significant was a 6.0 magnitude earthquake detected in the same area on Oct. 19.

Source: The U.S. Geological Survey