Spatial Ground Motion Correlation Model
Source to Site Azimuth
Modify spatial ground motion correlation models by 1. using source to site azimuth to represent path effects; 2. using ln Vs,30 to represent site effects.
Anelastic Cell-Specific Attenuation
Calculate path effects similiarity between stations with anelatsic cell-specific attenuation. Divide regions with small cells and count shared cell of different stations.
Cholesky Decomposition
Develop a method based on cholesky decomposition to study the factors beyond distance that could influence spatial ground motion correlation. The figure shows a synthetic map to verify whether spatial correlation is related to azimuth.
