Index to Postscript versions of each Figure

• Method and Theory

  • phase velocity, 66-100 s band, after non-linear inversion
  • phase velocity, 66-100 s band, after linear inversion

• Data

  • earthquakes, stations, paths
  • earthquakes, stations, paths plotted at same scale and projection as the model-layer figures. This figure can be printed on a transparency and used as an overlay on the model figures, to check the relationship between path coverage and observed features.

• Results: Data Fit

  • data fit: good paths vs poor paths
  • data fit: seismograms for 11/01/91
  • data fit: seismograms for 03/01/91
  • data fit: seismograms showing fits after non-linear, linear inversion steps

• Results: Models

  • model, layer 1, 25-100 km
  • model, layer 2, 100-200 km
  • model, layer 3, 200-300 km
  • model, all three layers in one figure

• Resolution

  • resolution test: input pattern, 9x9
  • resolution test: recovered pattern, 9x9
  • resolution test: input pattern, 7.5x7.5
  • resolution test: recovered pattern, 7.5x7.5