1:45 PM - 2:00 PM
[MIS13-12] Chocolate-chip cookie-like pumice from the 2021 eruption of Fukutoku-Oka-no-Ba has been observed many places in Japan; then how we can work on SNS-related geology?
Keywords:Fukutoku-Oka-no-Ba, submarine volcano, drift pumice, Twitter
Pumice ejected from the Fukutoku-Oka-no-Ba (FOB) eruption of August 2021 arrived at the Nansei Islands after 2-months drifting, and subsequently arrived at Kanto area to the east and Taiwan, Philippines, and Thailand to the west. During 2022, westward drifting reached at Thailand, while those drifting eastward arrived at Hokkaido and several coastal areas in the Japan sea side before September. Deposition of huge amount of the drift pumice, most of which had a chocolate-chip cookie resemblance in appearance, is a drastic event and thus attracted SNS account holders, so that the arrival timeline can be traced via their daily posts [1]. Gathering such huge amount of information from the internet can be a powerful tool to investigate and predict a geologic phenomenon that affects wide area in a short time scale. This paper introduces the geological and petrological outline of the drift pumice from the FOB, taking special care of their deposition style, petrographic characteristics, and comparison with the previous pumice drifting phenomena observed in Japan. Their impact to the Japanese society was well reflected to the buzz on SNS (Twitter), which served a unique opportunity to record the detailed timeline of the scattering of the drifting materials. We discuss how the scientist should behave on the internet to provide correct information in an effective way. Furthermore, we will briefly introduce most recent progresses on the FOB-related studies, covering drift pumice and proximal volcaniclastic materials, which will be presented in the related session (S-VC34 Volcanoes in the Sea) in detail.
[1] Yoshida et al. (2022) GKK https://doi.org/10.2465/gkk.220412
[1] Yoshida et al. (2022) GKK https://doi.org/10.2465/gkk.220412