Microtremor array surveys and development of the velocity model in the Hakodate Plain, Hokkaido, Japan
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- Material Type
- 記事
- Author/Editor
- Kimiyuki AsanoTomotaka IwataKunikazu Yoshida
- Publication, Distribution, etc.
- Publication Date
- 2022-06-17
- Publication Date (W3CDTF)
- 2022-06-17
- Periodical title
- EPS : Earth, Planets and Space
- No. or year of volume/issue
- 74(94)
- Volume
- 74(94)
- ISSN (Periodical Title)
- 1880-5981
- ISSN-L (Periodical Title)
- 1343-8832
- Text Language Code
- eng
- DOI
- 10.1186/s40623-022-01647-w
- Persistent ID (NDL)
- info:ndljp/pid/12685381
- Collection
- Collection (Materials For Handicapped People:1)
- Collection (particular)
- 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他
- Acquisition Basis
- オンライン資料収集制度
- Date Accepted (W3CDTF)
- 2023-03-07T16:17:01+09:00
- Date Captured (W3CDTF)
- 2023-03-07
- Format (IMT)
- application/pdf
- Access Restrictions
- 国立国会図書館内限定公開
- Service for the Digitized Contents Transmission Service
- 図書館・個人送信対象外
- Availability of remote photoduplication service
- 可
- Periodical Title (URI)
- Periodical Title (Persistent ID (NDL))
- info:ndljp/pid/12287068
- Data Provider (Database)
- 国立国会図書館 : 国立国会図書館デジタルコレクション
- Summary, etc.
- The Hakodate Plain in the southern part of the Oshima Peninsula, Hokkaido, Japan, is a sedimentary basin surrounded by mountains. The vertical displacements caused by active faults along the western margin of the Hakodate Plain increased the basin depth in the western part of the Hakodate Plain. Small-to-large-sized microtremor array surveys were conducted at five sites in the Hakodate Plain to estimate the S-wave velocity structure down to the seismic bedrock for each site to develop a detailed velocity structure model. A new three-dimensional velocity structure model of the Hakodate Plain was developed by integrating the results of microtremor array surveys and other existing geophysical explorations data. This three-dimensional velocity model was modeled as a stack of homogeneous isotropic layers to facilitate its incorporation into the present nation-wide three-dimensional velocity model for ground motion prediction. The bottom depth of the Quaternary sediments is deep along the western margin of the Hakodate Plain. The total thickness of the Quaternary and Neogene sedimentary layers reaches 2.9 km in the western Hakodate Plain. The proposed velocity model was validated by gravity anomaly modeling and ground motion simulation of a moderate-sized inland earthquake. The location of the low-gravity anomaly around the coastline of the Hakodate Bay was improved using the new model. The numerical ground motion simulation using FDM also demonstrated that the amplification and long duration observed in the western part of the Hakodate Plain were reproduced effectively using this velocity model. The spatial variation in long-period ground motion amplifications (period > 1 s) is discussed based on numerical simulations utilizing our three-dimensional velocity model. The highest amplifications at periods of 4 and 5 s were expected in the southwestern Hakodate Plain. The amplification at a period of 3 s was relatively high near the western margin of the plain. Conversely, the spatial characteristics below 2 s were quite complex due to interference of the seismic wavefield inside the basin structure. Variation due to the source location was also relatively high in the shorter period range.
- DOI
- 10.1186/s40623-022-01647-w
- Access Restrictions
- インターネット公開
- Rights (production)
- © The Author(s) 2022.This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Related Material
- Additional file 4 of Microtremor array surveys and development of the velocity model in the Hakodate Plain, Hokkaido, JapanAdditional file 5 of Microtremor array surveys and development of the velocity model in the Hakodate Plain, Hokkaido, JapanAdditional file 7 of Microtremor array surveys and development of the velocity model in the Hakodate Plain, Hokkaido, JapanAdditional file 6 of Microtremor array surveys and development of the velocity model in the Hakodate Plain, Hokkaido, JapanAdditional file 2 of Microtremor array surveys and development of the velocity model in the Hakodate Plain, Hokkaido, JapanAdditional file 3 of Microtremor array surveys and development of the velocity model in the Hakodate Plain, Hokkaido, Japan
- Related Material (URI)
- Is Referenced By
- Examination of one-dimensional S-wave velocity structure using strong-motion data for high-seismic-intensity area during the 2018 Hokkaido Eastern Iburi earthquakeデータDOIの引用情報に基づく防災科研MOWLASデータの利活用状況把握の試み
- References
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- Data Provider (Database)
- 国立情報学研究所 : CiNii Research
- Original Data Provider (Database)
- 学術機関リポジトリデータベース雑誌記事索引データベースCrossref科学研究費助成事業データベースCrossrefCrossrefCrossref
- Bibliographic ID (NDL)
- 12685381