A January 13, 2006 view of the north side of Montagu Island shows the lava field formed by a recent eruption and a plume rising above Mount Belinda. Montagu is the largest of the South Sandwich Islands and consists of a massive shield volcano cut by a 6-km-wide, ice-filled summit caldera. There was no record of Holocene or historical eruptive activity at Montagu until satellite data, beginning in late 2001, revealed thermal anomalies consistent with lava lake activity. Photo courtesy of Dave Hall, Frikkie Viljoen and Ian Hunter, 2006 (SA Argulhas and South African Weather Service).