Figure 2
From: Resolving Fine-Scale Heterogeneity of Co-seismic Slip and the Relation to Fault Structure
Analysis of co-seismic slip variation.
(top) Slip profiles for (a), Landers and (b), Hector Mine, shown by the black line. (middle) Power spectral density of the slip profiles for (c), Landers and (d), Hector Mine. Both profiles follow fractal distributions with no characteristic frequencies, red line delineates the corner frequency which is determined by the rupture length (which the fundamental mode cannot exceed), light gray lines denote the 95% confidence interval on the estimate of the power spectrum and green line the linear least-squares regression with coefficient of determination (R2) of 0.92 and 0.94 for (c,d) respectively. (e,f) Band-passed components of slip profiles at specific wavelengths, vertical red scaling bar defines the amplitude of slip, labels on y-axis denote the range of wavelength cut-off values used to filter the slip distribution at specific bands, with arbitrary vertical spacing for illustrative purposes. The band-pass filtering of slip at specific frequencies illustrates how its amplitude progressively diminishes with shorter wavelengths, a characteristic of a self-affine fractal distribution. Filters were performed with a Butterworth filter23, see Methods for more information on the specific upper and lower corner wavelength values used for each band.
