俯冲带板缘与板内地震长周期地震动参数预测模型研究

Study on the Long-period Ground Motion Predicting Model for Interface and Intraslab Earthquakes in Subduction Zone

对海域地震区划中涉及的我国海域有影响的俯冲带地震动参数预测模型研究进展与阶段性成果进行介绍,基于资料、回归方法等,对地震动参数预测模型建立过程进行说明。依托可靠的强震加速度记录与宽频带速度记录,采用使结果更稳定的分步回归方法,考虑俯冲带深大地震断层尺度与震源深度影响选取新的预测模型。针对我国海域实际地震环境,新的预测模型重点关注了对俯冲带长周期地震动的估计。

The progress and periodical result for establishing ground motion predicting model for subduction earthquakes of China sea area is introduced.The developing procedures are briefly summarized through ground motion data,attenuation model and regression strategy.The study is based on reliable strong motion acceleration records and broad-band velocity data,using a more robust step-regression approach,and with a model considering both rupture scale and focal depth of subduction earthquakes.Special attention is fixed on the long-period spectral predicting base on the realistic earthquake situation for China sea area.