Report on Lopevi (Vanuatu) — 6 December-12 December 2017
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 6 December-12 December 2017
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2017. Report on Lopevi (Vanuatu) (Sennert, S, ed.). Weekly Volcanic Activity Report, 6 December-12 December 2017. Smithsonian Institution and US Geological Survey.
16.507°S, 168.346°E; summit elev. 1413 m
All times are local (unless otherwise noted)
On 7 December Vanuatu Geohazards Observatory noted that unrest continued at Lopevi, and the Alert Level remained at 2 (on a scale of 0-4). Photos and satellite images acquired at the end of November confirmed ongoing activity from the vents in the summit crater characterized by gas-and-steam emissions.
Geological Summary. The small 7-km-wide conical island of Lopevi, known locally as Vanei Vollohulu, is one of Vanuatu's most active volcanoes. A small summit crater containing a cinder cone is breached to the NW and tops an older cone that is rimmed by the remnant of a larger crater. The basaltic-to-andesitic volcano has been active during historical time at both summit and flank vents, primarily along a NW-SE-trending fissure that cuts across the island, producing moderate explosive eruptions and lava flows that reached the coast. Historical eruptions at the 1413-m-high volcano date back to the mid-19th century. The island was evacuated following major eruptions in 1939 and 1960. The latter eruption, from a NW-flank fissure vent, produced a pyroclastic flow that swept to the sea and a lava flow that formed a new peninsula on the western coast.