A Maslov-propagator seismogram for weakly anisotropic media

Channeling of Branched Flow in Weakly Scattering Anisotropic Media.

When waves propagate through weakly scattering but correlated, disordered environments they are randomly focused into pronounced branchlike structures, a phenomenon referred to as branched flow, which has been studied in a wide range of isotropic random media. In many natural environments, however, the fluctuations of the random medium typically show pronounced anisotropies. A prominent example...

Gluon Propagator on a Coarse Anisotropic Lattice

We calculated the SU(2) gluon propagator in Landau gauge on an anisotropic coarse lattice with the improved action. The standard and the improved scheme are used to fix the gauge in this work. Even on the coarse lattice the lattice gluon propagator can be well described by a function of the continuous momentum. The effect of the improved gauge fixing scheme is found not to be apparent. Based on...

Synthesis of Seismogram Envelopes in Heterogeneous Media

SUMMARY Wave trains in high-frequency seismograms of local earthquakes are mostly composed of incoherent waves that are scattered by distributed heterogeneities. Their waveforms are very complex and significantly different from those computed for conventional layered structures; however, their envelopes are repeatable, frequency dependent, and vary regionally. Well-logs obtained from deep boreh...

Multi-azimuth Prestack Time Migration for General Anisotropic, Weakly Heterogeneous Media - Field Data Examples

Explicit expressions for map time-migration in weakly anisotropic VTI media

If the velocity of the medium is known and the medium does not incorporate different reflectors that have identical surface seismic measurements that remain identical under small perturbations of the medium, map migration achieves a one-to-one correspondence between the reflections recorded at the surface, and the reflectors in the subsurface, through explicit use of the slopes in the data. Bec...