Earthquakes in Vanuatu — August 2025

13 earthquakes were recorded in Vanuatu during August 2025, an average of 0.4 per day.

13 reached magnitude 4 or above and 3 reached magnitude 5 or above. The average focal depth was 111 km.

The month's largest event in Vanuatu was a magnitude 5.4 earthquake near Port-Vila, Vanuatu on 22 August 2025 at 12:52 UTC. A magnitude 5.4 earthquake radiates roughly 1,898 tons of TNT equivalent in seismic energy.

That is close to the Vanuatu monthly average of 13 events over the period we cover, and up from the 7 recorded the previous month.

31% of events here are shallow (under 70 km), 69% intermediate (70–300 km) and 0% deep-focus (over 300 km). A substantial share of intermediate-depth events points to a subducting slab beneath the region rather than purely crustal faulting.

By band, the catalogue holds 10 in the magnitude 4 range, 3 in the magnitude 5 range.

Activity peaked on 30 August, when 2 events were recorded.

The month's largest events were M5.4 near Port-Vila, Vanuatu on 22 August at 227 km; M5.2 near Isangel, Vanuatu on 28 August at 78 km; M5.0 near Port-Olry, Vanuatu on 17 August at 140 km.

That is close to the 13 events Vanuatu averages per month across the 21 months on record.