Earthquakes in Vanuatu — March 2025

9 earthquakes were recorded in Vanuatu during March 2025, an average of 0.3 per day.

9 reached magnitude 4 or above and 4 reached magnitude 5 or above. The average focal depth was 155 km.

The month's largest event in Vanuatu was a magnitude 5.4 earthquake near Isangel, Vanuatu on 28 March 2025 at 01:20 UTC. A magnitude 5.4 earthquake radiates roughly 1,898 tons of TNT equivalent in seismic energy.

That is below the Vanuatu monthly average of 13 events over the period we cover — a comparatively quiet month, and down from the 11 recorded the previous month.

33% of events here are shallow (under 70 km), 56% intermediate (70–300 km) and 11% deep-focus (over 300 km). That proportion of deep-focus events is the signature of a subduction zone: only a cold slab descending into the mantle stays brittle enough to rupture at those depths.

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

Activity peaked on 20 March, when 2 events were recorded.

The month's largest events were M5.4 near Isangel, Vanuatu on 28 March at 35 km; M5.3 near Sola, Vanuatu on 22 March at 125 km; M5.0 near Sola, Vanuatu on 05 March at 118 km.

That is 28% below the 13 events Vanuatu averages per month across the 21 months on record.