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Seawater-magma interactions sustained the high column during the 2021 phreatomagmatic eruption of Fukutoku-Oka-no-Ba

Earth Sciences

Seawater-magma interactions sustained the high column during the 2021 phreatomagmatic eruption of Fukutoku-Oka-no-Ba

F. Maeno, T. Kaneko, et al.

Explore the thrilling dynamics of the 2021 phreatomagmatic eruption at Fukutoku-Oka-no-Ba volcano, uncovered by researchers Fukashi Maeno, Takayuki Kaneko, Mie Ichihara, Yujiro J. Suzuki, Atsushi Yasuda, Kiwamu Nishida, and Takao Ohminato. This study delves into volcanic behavior influenced by seawater interactions and rapid magma ascent, offering vital insights into submarine volcanism.

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Playback language: English
Abstract
This paper investigates the 2021 phreatomagmatic eruption at Fukutoku-Oka-no-Ba volcano. The eruption, starting at a depth of <70 m, produced a 16 km-high eruption column sustained by rapid magma ascent and seawater interaction. The study uses high-resolution timeseries data from satellites and infrasound to analyze the eruption's four phases. Magma volume (~0.1 km³) is consistent with SO₂ emissions. The eruption dynamics are explained by near-vent pyroclast accumulation from jet-seawater interactions, with a magma discharge rate of 3–6 × 10⁵ kg/s. The findings contribute to understanding shallow submarine volcanism dynamics and hazards.
Publisher
Communications Earth & Environment
Published On
Nov 01, 2022
Authors
Fukashi Maeno, Takayuki Kaneko, Mie Ichihara, Yujiro J. Suzuki, Atsushi Yasuda, Kiwamu Nishida, Takao Ohminato
Tags
phreatomagmatic eruption
Fukutoku-Oka-no-Ba
seawater interaction
magma ascent
volcanism
hazards
eruption dynamics

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