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On a transmission inverse problem
In crosswell seismic experiments, seismic sources are fired in one well, and the wave-fields generated are measured in another well. The goal of the crosswell seismology is to find physical parameters, especially the ...
Three-dimensional first arrival traveltimes and amplitudes via eikonal and transport finite difference solvers
First arrival traveltimes and associated amplitudes are essential components in Kirchhoff migration and modeling. Traditionally they have been determined by ray tracing. However ray tracing does not give traveltimes on a ...
Broadening theories of soils genesis: Insights from Tanzania and simple models
Three basic assumptions of soil formation are challenged herein: the degree of chemical weathering decreases with depth; increased physical weathering due to high topographical gradients causes an increase in chemical ...
Sedimentological Investigations of Paleo-Ice Sheet Dynamics in West Antarctica
Modern Pine Island and Thwaites Glaciers, which both drain into Pine Island Bay, are some of the fastest moving portions of the cryosphere and may be the most unstable ice streams in Antarctica. I examined over 133 cores ...
Receiver Function Analysis and Acoustic Waveform Modeling for Imaging Earth’s Crust: New Techniques and Their Applications
The crust is the outer-most layer of the earth with thickness up to 80 km. Massive seismic waveform data have enabled imaging fine crustal structures with the aid of new imaging techniques. In this thesis, I develop seismic ...