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  1. 防災科研関係論文

Accelerating Seafloor Uplift of Submarine Caldera Near Sofugan Volcano, Japan, Resolved by Distant Tsunami Recordings

https://nied-repo.bosai.go.jp/records/6678
https://nied-repo.bosai.go.jp/records/6678
c1bcb722-9a29-43cb-aa5c-3166d31a4707
Item type researchmap(1)
公開日 2024-07-01
タイトル
言語 en
タイトル Accelerating Seafloor Uplift of Submarine Caldera Near Sofugan Volcano, Japan, Resolved by Distant Tsunami Recordings
著者 Tatsuya Kubota

× Tatsuya Kubota

en Tatsuya Kubota

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Osamu Sandanbata

× Osamu Sandanbata

en Osamu Sandanbata

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Tatsuhiko Saito

× Tatsuhiko Saito

en Tatsuhiko Saito

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Takanori Matsuzawa

× Takanori Matsuzawa

en Takanori Matsuzawa

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抄録
内容記述タイプ Other
内容記述 On 8 October 2023 UTC, significant tsunamis were observed around Japan without any major tsunamigenic earthquake, associated with a series of 14 successive minor earthquakes (m<sub>b</sub> = 4.5–5.4) near Sofugan in the Izu‐Bonin Islands. To examine the cause of this tsunami, we estimated the horizontal locations of the tsunami source and temporal history of the seafloor displacement, using the tsunami data recorded by the ocean‐bottom pressure gauges &gt;∼600 km away. Our results showed the main tsunami source was an uplift located at a caldera‐like bathymetric feature near Sofugan, suggesting the involvement of caldera activity in the tsunami generation. The total seafloor uplift was estimated as ∼4 m, and the uplift amount of each event gradually increased over time, reflecting an accelerating occurrence of volcanic unrest of the submarine caldera within only a few hours.
言語 en
書誌情報 en : Geophysical Research Letters

巻 51, 号 12, 発行日 2024-06-25
出版者
言語 en
出版者 American Geophysical Union (AGU)
ISSN
収録物識別子タイプ EISSN
収録物識別子 1944-8007
DOI
関連識別子 10.1029/2024gl108415
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