Submarine Volcano

Kaitoku is a submarine volcano off the coast of Japan.

This pale green plume signals the activities of Kaitoku, an underwater seamount near Japan. Periodic activity picked up there in August 2022 and continued into the new year. The rising plume likely consists of superheated acidic seawater mixed with particulates, sulfur, and rock fragments. Underwater volcanoes like this one are thought to account for up to 80 percent of our planet’s volcanic activity. (Image credit: L. Dauphin; via NASA Earth Observatory)

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