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

分析了S海底台网记录的2000多次Mj和Gt；=4级地震的强震记录。选择了高质量的记录，并对S网海底站点的站点放大特性进行了评估。利用相对较弱的运动记录(峰值加速度和Lt；50 cm/S/S)，对S Ne的全部150个台站的线性场地放大特性进行了检查。研究结果和分析结果发表在同行评议的《地球、行星和太空》国际期刊上。目前，对强震过程中的非线性场地响应特性的评估正在进行中。一篇包含分析初步结果的论文已提交给一份期刊。结果和分析在学术会议和会议上公布。

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.