4 Spectral Analysis of the Parkfield dataset
To investigate the effects of different assumptions about source model,
and spatial and temporal variation in path effects (and ECS), we perform
a sequence of independent inversions. All of these start from the event
spectra calculated in the single spectral decomposition inversion of the
entire dataset. We first investigate the effects of spatial binning
only, using the entire data set, and then separate the earthquakes into
3 time intervals related to the 2004 M6 earthquake to investigate
temporal variation.