P- and PS-wave vector wavefields for anisotropic petrophysics

Anisotropic Fermi superfluid via p-wave Feshbach resonance.

We investigate theoretically fermionic superfluidity induced by Feshbach resonance in the orbital p-wave channel and determine the general phase diagram. In contrast with superfluid (3)He, due to the dipole interaction, the pairing is extremely anisotropic. When this dipole interaction is relatively strong, the pairing has symmetry k(z). When it is relatively weak, it is of symmetry k(z) + ibet...

Slab segmentation revealed by anisotropic P-wave tomography

[1] Seismic anisotropy is a useful indicator for identifying the physical and chemical condition of the Earth’s interior, such as stress and flow fields, and in situ constituent minerals. Using traveltime tomography, we examined threedimensional anisotropic P-wave velocity structure of the Kii Peninsula, southwest Japan, where source regions of megathrust earthquakes along the Nankai Trough are...

Methods for Querying Compressed Wavefields

Large wavefield datasets are becoming increasingly large due to improvements in simulation techniques and advances in computer systems. Larger storage capacities enable scientists to store more data. For example, state of the art ground-motion numerical solvers produce Terabyte-size datasets per simulation. Operating on these datasets becomes extremely challenging due to decades of declining no...

Far Field Expansion for Anisotropic Wave Equations

Elastic wave mode separation for tilted transverse isotropic media

Seismic waves propagate through the earth as a superposition of different wave modes. Seismic imaging in areas characterized by complex geology requires techniques based on accurate reconstruction of the seismic wavefields. A crucial component of the methods in this category, collectively known as wave-equation migration, is the imaging condition that extracts information about the discontinuit...