Nikko volcan

Volcan sous-marin -391 m / -1,283 ft

Condition actuelle: normal / en sommeil (1 sur 5)

Nikko volcano is a large submarine volcano in the Volcano Islands chain of Japan. Discoloured water above the volcano has been observed almost every year between 1979 and 1990.

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Style éruptif tipique: fumarolic
Eruptions du volcan Nikko: 1979 (?)

No recent earthquakes
HeureMag. / ProfondeurDistance/Lieu

Introduction

from Smithsonian / GVP volcano information:
Nikko submarine volcano is a massive seamount that rises from nearly 3 km depth to within 391 m of the sea surface at the SE end of a submarine ridge segment extending from Minami-Iwo-jima island. Two large cones at the basaltic-to-andesitic volcano have been constructed on the NW and NE rims of a roughly 3-km-wide, flat-floored submarine caldera, whose rim is prominently displayed on the southern side, but largely buried on the north. A smaller cones lies on the SE caldera floor. The larger NW cone lies within a partially buried crater and displays hydrothermal activity. Discolored water was observed above Nikko seamount in July 1979, but no water discoloration has been observed during semi-regular seasonal reconnaissance flights since then. Hydrothermal venting was documented during a recent NOAA expedition.


See also: Sentinel hub | Landsat 8
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