Logo link to homepage

Report on Kaitoku Seamount (Japan) — 21 December-27 December 2022

Kaitoku Seamount

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 21 December-27 December 2022
Managing Editor: Sally Sennert.

Please cite this report as:

Global Volcanism Program, 2022. Report on Kaitoku Seamount (Japan) (Sennert, S, ed.). Weekly Volcanic Activity Report, 21 December-27 December 2022. Smithsonian Institution and US Geological Survey.

Weekly Report (21 December-27 December 2022)

Kaitoku Seamount


26.1217°N, 141.0955°E; summit elev. -95 m

All times are local (unless otherwise noted)

After JMA first reported new activity around the Kaitoku Seamount in August, discolored water continued to be periodically visible in Sentinel satellite images through 27 December. Though weather clouds sometimes prevented views of the vent area, and on occasion no activity was visible in clear images, plumes of discolored water drifting away from the vent area appeared to become more frequent in October. Images from 18 October, and 22 and 27 November possibly captured material at the surface or an eruption plume rising above the water. The Japan Coast Guard posted pictures of disturbed water around the vent in November. Recent Sentinel images on 17 and 27 December captured plumes of discolored water drifting as far as 10 km from the vent area.

Geological Summary. Submarine eruption have been observed during March 1984 and August 2022-January 2023 from Kaitoku Seamount (Kaitoku Kaizan), a three-peaked submarine volcano 80 km NNW of Kita-Ioto. The type of activity related to other observations of discolored water or bubbling, including an observation from 1543 CE, is uncertain.

Sources: Sentinel Hub, Japan Coast Guard