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Report on Suretamatai (Vanuatu) — 30 August-5 September 2023


Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 30 August-5 September 2023
Managing Editor: Sally Sennert.

Please cite this report as:

Global Volcanism Program, 2023. Report on Suretamatai (Vanuatu) (Sennert, S, ed.). Weekly Volcanic Activity Report, 30 August-5 September 2023. Smithsonian Institution and US Geological Survey.

Weekly Report (30 August-5 September 2023)



13.8°S, 167.47°E; summit elev. 921 m

All times are local (unless otherwise noted)

On 31 August the Vanuatu Meteorology and Geohazards Department (VMGD) reported that activity at Suretamatai continued at a level of “minor unrest.” No notable volcanic emissions were identified in the most recent satellite data, though steam emissions from areas around the cone and the Sulphur River continued to be locally observed. The public was reminded that the danger zone was near the cone and the Sulphur River, though the risk to the public was low.

Geological Summary. Suretamatai volcano (also known as Soritimeat) forms much of Vanua Lava Island, one of the largest of Vanuatu's Banks Islands. The younger lavas overlie a number of small older stratovolcanoes that form the island. In contrast to other large volcanoes of Vanuatu, the dominantly basaltic-to-andesitic Suretamatai does not contain a youthful summit caldera. A chain of small stratovolcanoes oriented along a NNE-SSW line gives the low-angle volcano an irregular profile. The youngest cone, near the northern end of the chain, is the largest and contains a lake of variable depth within its 900-m-wide, 100-m-deep summit crater. Activity reported during the 19th century consisted of moderate explosive eruptions.

Source: Vanuatu Meteorology and Geohazards Department (VMGD)