Investigation of site amplification at Ocean Bottom stations in the Japan Trench area for earthquake early warning

日本海沟地区海底站站点放大地震预警研究

• 批准号: 20K05055
• 负责人: Dhakal Yadab
• 金额: $ 2.58万
• 依托单位: National Research Institute for Earth Science and Disaster Prevention
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K05055/
• 关键词: Site amplification; S-net; Strong motion; Nonlinear site response; Earthquake early warning; Attenuation; Ocean bottom seismograph; Japan Trench; Path attenuation; Strong motions; Strong motion prediction; Damaging earthquakes; K-NET/KiK-net /

Strong-motion records from more than 2000 earthquakes of magnitudes (Mj) >= 4 recorded at the S-net seafloor stations were analyzed. High-quality records were selected, and site amplification properties at the S-net seafloor sites were evaluated. The linear site amplification properties were examined at all 150 stations of the S-ne using relatively weak-motion records (peak accelerations < 50 cm/s/s). The results and analysis were published in a peer-reviewed international journal of Earth, Planets and Space. Currently, evaluation of the nonlinear site response properties during strong shakings has been ongoing. A paper with the preliminary results of the analysis has been submitted to a journal. The results and analysis were presented in academic meetings and conferences.

分析了来自S-NET海底的2000多个地震（MJ）> = 4的强度记录。选择了高质量的记录，并评估了S-NET海底部位的位置放大特性。使用相对较弱的动作记录（峰值加速度<50 cm/s/s），在S-NE的所有150个站点检查了线性位点扩增属性。结果和分析发表在经过同行评审的国际地球，行星和空间杂志上。当前，对强摇动期间非线性位点响应属性的评估一直在进行中。分析的初步结果的论文已提交给期刊。结果和分析在学术会议和会议上介绍。

项目成果

Threshold PGAs for inducing rotations of accelerometers at the S-net sites: a preliminary site-specific analysis

用于在 S 网站点诱导加速度计旋转的阈值 PGA：初步的站点特定分析

• 发表时间: 2021
• 作者: 大場武;Yadab P. Dhakal
• 通讯作者: Yadab P. Dhakal

Investigation of site amplification at the S-net seafloor sites based on spectral inversion of S waves

基于S波谱反演的S网海底站点站点放大研究

• 发表时间: 2022
• 作者: Dhakal;Y.P.;Wakai A.;Yamanaka H.;Kunugi T.;and Aoi S.
• 通讯作者: and Aoi S.

Simultaneous estimation of source, path, and site spectra from the S-net strong-motion records in the Japan Trench area

日本海沟地区 S-net 强震记录的源、路径和位点谱的同步估计

• 发表时间: 2022
• 作者: Dhakal;Y.P.;Kunugi T.;Aoi;S.;Yamanaka;H.
• 通讯作者: H.

Some features of strong-motions recorded by S-NET

S-NET记录的强震的一些特征

• 发表时间: 2020
• 作者: 小西 智久;伊藤 征嗣;小黒 剛成;Dhakal YP; Kunugi T; Wataru S; Aoi S
• 通讯作者: Dhakal YP; Kunugi T; Wataru S; Aoi S

日本海溝のS-net観測点で観測されたS波からスペクトルインバージョン法により推定した震源

根据日本海沟 S-net 观测点观测到的 S 波谱反演估计震源