* Astronomy

The NZASRoF07 Kermadec Arc expedition departed from Auckland Harbour, heading up the Ngatoro Rift Basins and on to Brothers Volcano. The bathymetry fly-through begins over the North Island of New Zealand, then heads northeast over the Ngatoro Rift Basins, turns east and then north flying over the Kermadec Arc submarine volcanoes. The flight path continues north to Brothers caldera, turns around and looks south over the arc and backarc with New Zealand in the background. The bathymetry data consist of multibeam data (GNS) overlaid on satellite altimetry (Smith and Sandwell), and are exaggerated 2.5 times. Brothers submarine volcano is host to the most active and possibly largest of any hydrothermal vent fields discovered to date along the Kermadec Arc. The three-dimensional image depicts Brothers, looking toward the northeast. Depths in this image range from 1,205 to 2,835 meters. The bathymetry is 2.5 times vertically exaggerated. The high-resolution EM300 bathymetry data (25-meter grid cell size) used to create the image are proprietary, courtesy of New Zealand National Institute of Water and Atmospheric Research (NIWA). Movie courtesy of the NOAA Vents Program