Report on Lateiki (Tonga) — 13 November-19 November 2019
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 13 November-19 November 2019
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2019. Report on Lateiki (Tonga). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 13 November-19 November 2019. Smithsonian Institution and US Geological Survey.
19.18°S, 174.87°W; summit elev. 43 m
All times are local (unless otherwise noted)
Satellite images showed that the mid-October eruption at Lateiki (Metis Shoal) had formed a new and larger island, but by 14 November it had eroded to a size similar to the pre-eruptive size.
Geologic Background. Lateiki, previously known as Metis Shoal, is a submarine volcano midway between the islands of Kao and Late that has produced a series of ephemeral islands since the first confirmed activity in the mid-19th century. An island, perhaps not in eruption, was reported in 1781 and subsequently eroded away. During periods of inactivity following 20th-century eruptions, waves have been observed to break on rocky reefs or sandy banks with depths of 10 m or less. Dacitic tuff cones formed during the first 20th-century eruptions in 1967 and 1979 were soon eroded beneath the ocean surface. An eruption in 1995 produced an island with a diameter of 280 m and a height of 43 m following growth of a lava dome above the surface.
Source: Simon Carn