2022 Volume 78 Issue 2 Pages I_721-I_726
On 13 August 2021, an underwater volcano, Fukutokuoka-no-ba of the Ogasawara Islands erupted producing a large amount of pumice. Much pumice had arrived around the north part of Okinawa Island since 17 October 2021, causing large damages to the fishery, shipping and tourism. On 28 October 2021, urgent field observation of deposition of pumice was carried out at the Yagaji fishing port located on the north coast of Motobu Peninsula. Video picture of floating pumice around the fishing port was taken using an UAV, as well as the observation of deposition of pumice on the beaches. It was found that a large amount of pumice was transported from the north and deposited on the north side of the fishing port facility, because the movement of pumice was blocked by the fishing port breakwater.
