Strong Motion Estimation in the LA Basin Due to Great Earthquakes

[304110] Helmberger这项研究是为了计算三维地球特征下的大地震的运动，特别是在建筑物和其他结构的深层软材料盆地下。最近对1985年墨西哥城地震、1989年洛马普里塔地震和1992年南加州兰德斯地震的研究结果将用于计算洛杉矶盆地对大地震的反应。这项工作的动机是这些地震在相当远的距离上产生了惊人的大运动，特别是在软岩地区。这些运动明显大于标准工程实践预测的运动。这项研究是国家减少地震危害计划的一个组成部分。＊＊＊

9304110 Helmberger This research is to compute motions from large earthquakes at sites underlain by three-dimensional earth features, especially where a deep soft-material basin underlies buildings and other structures. Results from recent studies of the 1985 Mexico Cit earthquake, the 1989 Loma Prieta earthquake and the 1992 Landers earthquake in southern California will be used to compute the response of the Los Angeles basin to great earthquakes. The work is motivated by the fact that these earthquakes produced surprisingly large motions at considerable distances, especially at soft-rock sites. These motions were significantly larger than those predicted by standard engineering practice. This research is a component of the National Earthquake Hazard Reduction Program. ***