Many of the pits on the summit of Giggenbach volcano show layered ash deposits such as these which are evidence for violent eruptions in the past. The ghostly blue hue of the scene is from ambient sunlight at this depth. Image courtesy of New Zealand-American Submarine Ring of Fire 2005 Exploration, NOAA Vents Program.
Related Links
New Zealand American Submarine Ring of Fire 2005
New Zealand American Submarine Ring of Fire 2005: April 18 Log
