Figure 1. Norwegian continental margin, showing relatively recent giant underwater landslides in green: SS, Storegga slide; TS, Traenadjupet slide; AS, Andoeya slide; and BIFS, Bear Island Fan slide. Gas hydrate stability models shown in Figures 2 and 3 were computed along red line. Black contours show water depths in 100s of meters; thickness of modern methane hydrate stability zone, in meters, shown by dashed blue contours (600m and 0m). Blue ovals and patches show areas where seismic surveying has detected hydrates.