Particle plumes at NW Rota-1 volcano were mapped using a light scattering sensor (LSS), which is part of the CTD package towed over the volcano's summit and flanks. We expected to see an intense plume over the summit generated by the hydrothermal activity there, but the layers of murky water deep along the flanks of the volcano were a surprise. An additional vertical cast about 7 km (3.8 nautical mi) southwest of the summit showed these strongly turbid layers were still present at that distance. Total distance represented by this figure from south to north is about 12 km (6.5 nautical mi). Image courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program
