Global Volcanism Program | Image GVP-11869
Submarine hydrothermal activity occurs at Brothers volcano, as seen here at this tall (up to 4 m high), active black smoker chimney, which is part of a large field of vents on the NW caldera wall. The oval-shaped caldera is 3-3.5 km wide and contains a post-caldera lava dome constructed on the S caldera floor.
Image courtesy of New Zealand-American Submarine Ring of Fire 2005 Exploration, NOAA Vents Program.
This image is made available as a Public Domain Work, but proper attribution is appreciated.