Fonualei South spreading center. Image looks toward the south, 2 times vertically exaggerated. EM122 multibeam bathymetry grid cell size is 35 meters. Image courtesy of Submarine Ring of Fire 2012 Exploration, NOAA Vents Program. Download larger version (jpg, 2.0 MB).

Mangatolu triple junction. Image looks toward the southwest, 2 times vertically exaggerated. The proposed dive site is mid-image. The triple junction is in the background. EM300 multibeam bathymetry grid cell size is 35 meters. Image courtesy of Submarine Ring of Fire 2012 Exploration, NOAA Vents Program. Download larger version (jpg, 3.6 MB).

Northern Northeast Lau spreading center (NELSC). Image looks toward the northeast, 2 times vertically exaggerated. EM300 multibeam bathymetry grid cell size is 35 meters. Image courtesy of Submarine Ring of Fire 2012 Exploration, NOAA Vents Program. Download larger version (jpg, 3.0 MB).

Niua volcano in foreground. Image looks toward the north/northeast, 2 times vertically exaggerated. EM300 and EM122 multibeam bathymetry grid cell size is 35 meters. Image courtesy of Submarine Ring of Fire 2012 Exploration, NOAA Vents Program. Download larger version (jpg, 3.6 MB).

The North Mata group of volcanoes. Image looks toward the northeast, 2 times vertically exaggerated. 6 of these 7 seamounts were found to have hydrothermal activity during an expedition in 2010. EM300 and EM122 multibeam bathymetry grid cell size is 35 meters. Image courtesy of Submarine Ring of Fire 2012 Exploration, NOAA Vents Program. Download larger version (jpg, 3.2 MB).

Vai Lili hydrothermal vent site located on the Valu Fa ridge, Eastern Lau spreading center (ELSC). The image looks toward the south, 2 times vertically exaggerated. SeaBeam multibeam bathymetry grid cell size is 50 meters. Image courtesy of Submarine Ring of Fire 2012 Exploration, NOAA Vents Program. Download larger version (jpg, 3.5 MB).

Volcano O, a huge caldera in the Northeast Lau Basin. Image looks toward the north, 2 times vertically exaggerated. EM300 and EM122 multibeam bathymetry grid cell size is 35 meters. Image courtesy of Submarine Ring of Fire 2012 Exploration, NOAA Vents Program. Download larger version (jpg, 4.2 MB).