Noah Harding Professor
Department of Computational and Applied Mathematics
Department of Earth Science
"Inversion Velocity Analysis"
Migration velocity analysis leverages the considerable redundancy of active source seismic data to estimate the velocity of compressional waves in the earth. With a correct velocity (there are many!), the output of prestack migration becomes focused: the focusing is visually obvious and leads to a number of effective techniques. Recently a number of researchers have attempted to quantify the focusing effect, turning velocity analysis into an optimization problem. I will show how the imaging process is related to the solution of a variant of the seismic full waveform inverse problem, and how a refinement of the focusing criterion leads to both a better-behaved optimization problem and, simultaneously, full waveform inversion.
Jointly sponsored by the Department of Geosciences
and the Department of Mathematical Sciences
Hosts: Susan Minkoff and George McMechan
There will be a reception immediately following the talk.