WAVEFORM TOMOGRAPHY 2008:

Beyond the First Arrival

 

A short course, to be held at

Queen’s University in Kingston, Canada

Tues - Friday April 28th- May 2nd, 2008

 

Instructors: Gerhard Pratt, Drew Brenders

Queen’s University

(Registration required, space is limited)

 

In Waveform Tomography the input data consist of the seismic waveforms themselves (as opposed to the picked traveltimes), and the underlying numerical method is based on the full wave equation (as opposed to a ray approximation or a Born approximation). These features make waveform tomography less approximate and consequently better resolved than traveltime tomography. The course assumes a basic understanding of the principles of traveltime tomography and seismic waveform analysis.

 

COURSE OUTLINE:

 

  • Introduction to tomography
  • Waveform modelling by frequency domain finite differences
  • Computer exercise in modelling
  • Inverse methods
  • Computer exercise in waveform tomography
  • Detailed case study and further exercises with data from the 12th CCSS workshop

 

The contents pages from the 2004 Course Notes are available here.

 

All participants in the short course will receive training in the frequency-domain waveform tomography package in use at Queen’s University. On signing a software license agreement, academic participants will receive a Linux-compatible copy of the code and a one-year, non-exclusive, non-commercial, non-transferable user license to the code. For registration and travel information see http://www.geol.ca/people/pratt/WavetomoRegistration.htm

 

For more information on Waveform Tomography see the following (and references therein):

 

Pratt, R.G., 2004. Velocity models from Frequency-Domain Waveform Tomography: Past, Present and Future. An invited presentation given at the 66th Conference and Exhibition of the EAGE, Paris, France. Delivered at the W8 Workshop on "Estimation of Accurate Velocity Macro-Models in Complex Structures".

 

Pratt, R.G., 2003. Waveform tomography: theory and practice. An invited presentation given at the 12th International Workshop on Controlled-Source Seismology, Mountain Lake, Virginia
 
Sirgue, L. and Pratt, R. G., 2004. Efficient waveform inversion and imaging: a strategy for selecting temporal frequencies. Geophysics, 69, 231-248.
 
Pratt, R.G., 1999. Seismic waveform inversion in the frequency domain, Part 1: Theory, and verification in a physical scale model. Geophysics, 64, 888-901.