On November 2nd, CoSV hosted the webinar entitled “August 2021 eruption of the Fukutoku Oka-na-Ba volcano, Izu-Bonin Arc: Latest results from the rapid response seafloor surveys”. This webinar was presented by Dr. Kenichiro Tani, of the Department of Geology at the National Museum of Nature and Science, Japan.
To watch the past webinar , click this link.
Abstract:
Fukutoku-Oka-no-Ba (FOB) is an active submarine volcano located in the southernmost Izu-Bonin Arc, which erupted on August 13, 2021. The eruption reached a plume altitude of 16 km at the tropopause, and satellite images showed that discolored water appeared below the sea surface at the onset of the eruption, followed by formation of pumice rafts and a new emergent island.
Following the eruption, we have conducted two rapid response research cruises in 2022. The first cruise was conducted in April, and we were successful in obtaining sediment cores at 8 sites on the western foothill of FOB. The second cruise was conducted in August, and we were able to observe the horizontal extension of eruptive materials on the distal/proximal sites using a remotely-operated vehicle. We expect to understand the detailed time sequence of the 2021 eruption and the deposition mechanisms of the ejecta beneath the sea surface. In this talk, we will introduce our latest results from these surveys.
On November 29th, CoSV hosted the webinar entitled “Assessment of the Physical Properties of the Umbrella Clouds associated with Submarine Eruptions”. This webinar was presented by Dr. Ashok Kumar Gupta, of UCLA and Vanderbilt University, USA. We continue on our…
