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Home  Underwater VolcanoesSubmarine Volcanoes
Name Suiyo Seamount
Depth 500 meters
Height 1400 meters
Type Submarine volcano
Location Izu Islands (Japan)
Status Historical
Eruption Unknown
Description Suiyo Seamount, one of the Shichiyo Seamounts, named for the 7 days of the week, lies south of Sofugan volcano. Suiyo Wednesday is an basaltic to dacitic submarine caldera and lava dome that rises abaout 1400 m from the sea floor to within 1418 m of the sea surface. The summit caldera is 1.5 km wide and about 500 m deep. Major hydrothermal activity was observed in July 1991, with temperatures reaching more the 290 degrees Centigrade, and the volcano was reclassified as active by the Japan Meteorological Agency.
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