The fly-over begins by looking at the entire Marianas trench, Mariana arc and backarc. The darker purple/blue background is satellite data grid (3500 meter resolution) representing islands and volcanoes (3500 meter grid). Then we zoom in to the area of Ahyi, Makhanas and NW Uracas volcanoes. The latter, high resolution (lighter color) data are the EM300 multibeam bathymetry (35 meter grid). Movie thanks to support from Interactive Visualization Systems.