Daikoku VulkanDaikoku is a sumbarine volcano with a conical
summit in the Japanese Volcano Islands chain. It sits on an
elongated E-W-trending ridge SE of Eifuku submarine volcano and
rises to within 323 m of the sea surface. It has a crater with a
black pool of liquid sulfur discovered in 2006. Daikoku
submarine volcano is one of about a dozen submarine volcanoes
displaying hydrothermal activity in the southern part of the
Izu-Marianas chain. Beschreibung:A steep-walled, 50-m-wide
cylindrical crater on the north flank, about 75 m below the
summit, is at least 135 m deep and was observed to emit cloudy
hydrothermal fluid. During a NOAA expedition in 2006, scientists
observed a convecting, black pool of liquid sulfur with a partly
solidified, undulating sulfur crust at a depth of 420 m below
the summit of Daikoku. Gases, particulate with the appearance of
smoke, and liquid sulfur were bubbling up from the back edge of
the sulfur pool. (Smithsonian / GVP volcano information)