An inversion method is presented for the reconstruction of interface geometry between two or more crustal layers from teleseismic traveltime residuals. The method is applied to 2-D models consisting of continuous interfaces separating constant-velocity layers. The forward problem of determining ray paths and traveltimes between incident wave fronts below the structure and receivers located on t...

Pore-pressure variations inside producing reservoirs result in excess stress and strain that cause time shifts of reflected waves. Inversion of seismic data for pressure changes requires better understanding of the dependence of compaction-induced time shifts on reservoir pressure reduction. Here, we investigate pressure-dependent behavior of P-, S-, and PS-wave time shifts from reflectors loca...

In this paper, I present a 3-D implementation of Huygens wavefront tracing. The threedimensional version of the method retains the characteristics of the two-dimensional one: stability, accuracy, and efficiency. The major difficulty of the 3-D extension is related to the handling of triplications. An easy to implement solution is to approximate the wavefronts at the triplications as planes orth...

Article history: Received 19 November 2013 Received in revised form 22 June 2014 Accepted 6 November 2014 Available online 13 November 2014