Practical Complexities and Some Solutions for the Seismic Inverse Problem

4:30 PM-7:00 PM

*Room: Ballroom A*

The goal of linearized seismic inversion is the estimation of high-frequency perturbations in material earth parameters. Such estimates are complicated by a strongly heterogeneous subsurface medium. For example, strong velocity variations focus energy leading to shadow zones as well as complicated ray geometries. Mathematically, the inverse problem requires optimization algorithms that are flexible enough to handle vast amounts of data efficiently, can incorporate coordinate changes from acquisition to processing, and will reliably converge to a realistic earth model. The speakers in this minisymposium will present ideas for handling some of the difficulties encountered in solving the seismic inversion problem.

**Organizers: Clifford J. Nolan**

*University of Washington*

**Susan E. Minkoff**

*Sandia National Laboratories, Albuquerque*

**4:30-4:55 A Multiscattering Series for Impedance Tomography in Layered Media**

*Liliana Borcea*, Rice University; and Michael Ortiz, California Institute of Technology

**5:00-5:25 Kirchhoff Data Mapping: A Tool for Data Reduction and Simplification**- Norman Bleistein, Colorado School of Mines
**5:30-5:55 Estimating the Topography of Multi-dimensional Functions**

*Hongling Lydia Deng*, Mobil Exploration and Exploration Technical Center, Dallas; and John A. Scales, Colorado School of Mines

**6:00-6:25 Microlocal Analysis of Migration in Elastic Media**

- Christiaan Stolk, University of Utrecht, The Netherlands

**6:30-6:55 High-Frequency Anisotropic Inversion**

- Clifford J. Nolan, Organizer

*MMD, 11/19/98*