In this paper we describe a stochastic method of wavelet estimation tying well logs to seismic data. It has the advantage over traditional methods that it is statistically robust, that is, it is insensitive to outliers in the reflection coefficients and in the seismic data. This is achieved by generating random perturbations to an initial wavelet and comparing the resulting synthetics to the se...

We apply the reciprocity method (EISNER and CLAYTON, 2001a) to compare the full waveform synthetic seismograms with a large number of observed seismograms. The reciprocity method used in the finite-difference modeling allows for the use of high quality data observed from the earthquakes distributed over the wide range of azimuths and depths. We have developed a methodology to facilitate the com...

Seismic wave propagation simulations are limited in their frequency content by two main factors: (1) the resolution of the seismic wave-speed structure of the region in which the seismic waves are propagated through and (2) the extent of our understanding about the rupture process, mainly on the short length scales. For this reason, high-frequency content in the ground motion must be simulated ...

[1] Recent (ScS-S) results from probing the deep structure beneath southern Africa display strong delays of up to 10 s at distances beyond 90 . Such delays could be explained by long-period tomographic models containing smooth (weak) features with the addition of rough (strong) D00 structure (3–9% drops in shear velocities). However, these structures cannot explain the (SKS-S) differentials sam...