By comparing records of the radial component of motion of teleseismic P waves to records of the vertical component, it is possible to identify S phases within the P wave form. These phases are generated by the mechanism of P to S conversion at discontinuities in velocity under the receiving station. Similar phases of the S to P converted type appear as precursors to the direct SV arrival. Model...

An important application of 3-D converted P to S-waves (PS-waves) is to exploit S-wave birefringence (splitting) for delineating reservoir fractures. In azimuthally anisotropic media, fracture intensities and orientations are directly related to traveltime differences between the fast and slow S-wave and the polarization direction of the fast S-wave, respectively. Analysis techniques to help ch...

The development of multi-component seismic acquisition technology creates new possibilities for the high-precision imaging complex media. Compared to scalar acoustic wave equation, elastic equation takes information P-waves, S-waves, and converted waves into account simultaneously, enabling accurate description actual propagation. However, inherent attenuation is one important factors that rest...

Two marine walkaway VSP lines are recorded by three-component receivers positioned in a dolomite layer. The layer has a high seismic velocity relative to the surrounding rocks and may be fractured. The recorded wavefield is analysed to determine whether this acquisition is suitable to image details of the internal structure of the layer. The principal arrivals in the wavefield are a dominant ho...

Ultrasonic wedges which can propagate one longitudinal L and two orthogonally polarized shear S waves are presented. In order to use this wedge to generate and received guided plate acoustic waves along a metal plate at high temperatures brass which has a slow L and S wave velocities was chosen. Mode conversion method was used to convert L to S waves in the wedge. The mode conversion efficiency...

We present an algorithm for deterministically deciding SAT in linear time by P systems with active membranes using only two polarizations and rules of types (a), (c), and (e). Moreover, various restrictions on the general form of the rules are considered: global, non-renaming, independent of the polarization, preserving it, changing it, producing two membranes with different polarizations, havi...

Abstract There are many successful geothermal projects that exploit the Upper Jurassic aquifer at 2–3 km depth in German Molasse Basin. However, up to now, only P-wave seismic exploration has been carried out. In an experiment Greater Munich area, we recorded S-waves were generated by conventional survey, using 3C receivers. From this, built a 3D volume of P- S-converted (PS) waves asymptotic c...