フルテキストURL esr_028_cover_j.pdf
出版物タイトル Okayama University Earth Science Report
発行日 2022-03-31
28巻
1号
ISSN 1340-7414
言語 日本語
著作権者 © 2022 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
フルテキストURL esr_028_colophon.pdf
出版物タイトル Okayama University Earth Science Report
発行日 2022-03-31
28巻
1号
ISSN 1340-7414
言語 日本語
著作権者 © 2022 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
JaLCDOI 10.18926/ESR/63515
タイトル(別表記) FDM simulation of long-period ground motions around Oita Prefecture, Japan, using a land-ocean unified 3D structure model
フルテキストURL esr_028_027_103.pdf
著者 奥仲 達也| 小松 正直| 竹中 博士| 吉見 雅行| 中村 武史| 岡元 太郎|
抄録 Oita prefecture is located in northeastern part of Kyushu Island which is characterized by active subduction of the Philippine Sea plate (PHS) beneath the Eurasian plate and several active volcanoes along with the volcanic front. Oita area has frequently been damaged by large earthquakes and tsunamis since ancient times. From the point of view of disaster prevention, it is important to investigate the feasibility of strong ground motion prediction using realistic structural models. In this paper we use a land-ocean unified 3D (three-dimensional) structure model around Oita prefecture, which includes land and sea-floor topography and a seawater layer as well as subsurface structures of the arc side and the PHS slab to conduct the FDM (finite-difference method) simulations of strong ground motion in land and ocean areas for the 2015 Southern Oita, Japan, earthquake (MJMA5.7) whose hypocenter is located in the PHS slab. The simulated long-period (2–20 s) ground motions reproducing observed records demonstrate substantial contributions of thick low-velocity sediment layers in and around Beppu Bay and Oita basin to development of the motions. We also examine the topographic effects on the seismic motion by analyzing the simulation results to show the strong enhancement of the later phases.
キーワード strong motion Oita the 2015 Southern Oita earthquake long-period ground motion simulation finite-difference method topography
出版物タイトル Okayama University Earth Science Report
発行日 2022-03-31
28巻
1号
開始ページ 27
終了ページ 103
ISSN 1340-7414
言語 日本語
著作権者 © 2022 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
JaLCDOI 10.18926/ESR/63514
タイトル(別表記) Depositional history of the Paleogene to Neogene valley fill deposits and topographic change in the Kibi Plateau region, Okayama City, Southwest Japan
フルテキストURL esr_028_001_025.pdf
著者 田中 元| 鈴木 茂之|
キーワード Kibi Plateau Surface Paleogene Kibi Group Miocene Bihoku Group
出版物タイトル Okayama University Earth Science Report
発行日 2022-03-31
28巻
1号
開始ページ 1
終了ページ 25
ISSN 1340-7414
言語 日本語
著作権者 © 2022 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
フルテキストURL esr_028_titlepage.pdf
出版物タイトル Okayama University Earth Science Report
発行日 2022-03-31
28巻
1号
ISSN 1340-7414
言語 日本語
著作権者 © 2022 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
フルテキストURL esr_028_cover.pdf
出版物タイトル Okayama University Earth Science Report
発行日 2022-03-31
28巻
1号
ISSN 1340-7414
言語 日本語
著作権者 © 2022 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher