Bowen Guo

Tutorial for Wave Equation Inversion of Skeletonized Data

AbstractFull-waveform inversion of seismic data is often plagued by cycle-skipping problems such that an iterative optimization method often gets stuck in a local minimum. To avoid this problem, we simplify the objective function so that the iterative solution can quickly converge to a solution in the vicinity of the global minimum. The objective function is simplified by only using parsimonious and important portions of the data, which are defined as skeletonized data. We have developed a mostly nonmathematical tutorial that explains the theory of wave-equation inversion of skeletonized data. We also demonstrate its effectiveness with examples.

Far-field super-resolution imaging of resonant multiples

Seismic resonant multiples, which can yield resolutions more than twice the classical resolution limit, are used for far-field super-resolution imaging. We demonstrate for the first time that seismic resonant multiples, usually considered as noise, can be used for super-resolution imaging in the far-field region of sources and receivers. Tests with both synthetic data and field data show that resonant multiples can image reflector boundaries with resolutions more than twice the classical resolution limit. Resolution increases with the order of the resonant multiples. This procedure has important applications in earthquake and exploration seismology, radar, sonar, LIDAR (light detection and ranging), and ultrasound imaging, where the multiples can be used to make high-resolution images.

Extension of Seismic Scanning Tunneling Macroscope to Elastic Waves

The theory for the seismic scanning tunneling macroscope is extended from acoustic body waves to elastic body-wave propagation. We show that, similar to the acoustic case, near-field superresolution imaging from elastic body waves results from the O(1/R) term, where R is the distance between the source and near-field scatterer. The higher-order contributions

Direct Detection of Near-surface Faults by Migration of Back-scattered Surface Waves

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Super-virtual Interferometric Separation and Enhancement of Back-scattered Surface Waves

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Multiscale Phase Inversion of Seismic Data

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