Suiyo Seamount

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.