Frequency Domain Inversion for Fault Slip During the Loma Prieta Earthquake

这项研究是为了反演洛马普里塔地震的近震源波形，以确定断层滑动的时空行为。这些数据将补充来自中间和远程地震距离的记录。本文提出的方法是使用一种新的范数最小化约束的频域反演方法，该方法产生的滑移模型的特征是具有最接近恒定的破裂速度和空间滑移幅度分布，与数据一致。震源参数，如震源位置、震源时间函数、破裂前沿几何形状和传播方向等不是预先确定的，而是求解的。这项研究是国家减少地震灾害计划的一部分。

This research is to invert near-source waveforms of the Loma Prieta earthquake to determine the temporal and spatial behavior of fault slip. These data will be supplemented with records from intermediate and teleseismic distances. The methodology proposed here is a frequency domain inversion method using a new norm minimization constraint that produces slip models characterized by having the most nearly constant rupture velocity, and spatial slip amplitude distribution, that are consistent with the data. Source parameters such as hypocenter location, source time function, rupture front geometry and direction of propagation are not predetermined, but solved for. This research is a component of the National Earthquake Hazard Reduction Program.