Report on Home Reef (Tonga) — 16 May-22 May 2007
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 16 May-22 May 2007
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2007. Report on Home Reef (Tonga). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 16 May-22 May 2007. Smithsonian Institution and US Geological Survey.
18.992°S, 174.775°W; summit elev. -10 m
All times are local (unless otherwise noted)
Pumice from the Home Reef eruption that began early-to-mid August 2006 reached the eastern Australian coast in March 2007. A substantial stranding of the pumice in mid-April extended for more than 1,300 km along the Queensland and northern New South Wales coast. Pumice clasts ranged in size from 1-4 cm in diameter, with the largest clasts up to 17 cm in diameter. A visit to the area in February 2007 revealed a pumice mound barely visible over the waves.
Geologic Background. Home Reef, a submarine volcano midway between Metis Shoal and Late Island in the central Tonga islands, was first reported active in the mid-19th century, when an ephemeral island formed. An eruption in 1984 produced a 12-km-high eruption plume, copious amounts of floating pumice, and an ephemeral island 500 x 1500 m wide, with cliffs 30-50 m high that enclosed a water-filled crater. Another island-forming eruption in 2006 produced widespread dacitic pumice rafts that reached as far as Australia.
Source: Scott Bryan, School of Earth Sciences and Geography, Kingston University