Monitoring temporal changes with shear wave splitting: testing the methodology
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E . Walsh, M. Savage, R. Arnold, F . Brenguier & E. Rivemale PowerPoint PPT Presentation


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Monitoring temporal changes with shear wave splitting: testing the methodology Supplementary Material. E . Walsh, M. Savage, R. Arnold, F . Brenguier & E. Rivemale abstract ID #1479768, poster S43F-2530. Background Information.

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E . Walsh, M. Savage, R. Arnold, F . Brenguier & E. Rivemale

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E walsh m savage r arnold f brenguier e rivemale

Monitoring temporal changes with shear wave splitting: testing the methodologySupplementary Material

E. Walsh, M. Savage, R. Arnold,

F. Brenguier & E. Rivemale

abstract ID #1479768, poster S43F-2530


Background information

Background Information

  • A printed poster cannot contain animated content so we have chosen to show an animated graph similar to Figure 2 from the poster

  • To view the animations start the slide show (F5)

  • The animations are the property of the first author and cannot be reused without written permission

  • The poster should be read before looking at this content

  • Extra comments on the animations are given on the other slides


Cycle skipping and the incoming polarisation explanation of graphs

Cycle Skipping and the Incoming Polarisation – Explanation of Graphs

The next slides contain 3 animated plots

Left plot = waveforms before and after reversing the splitting – the p component is related to the orientation of the original wave

Middle plot = particle motion plus fast and slow waveforms before and after reversing the splitting

Right plot = contour plot of the error surface – cross hairs show the current splitting parameters. Bold area is the 95% confidence region


Cycle skipping and the incoming polarisation animation 1

Cycle Skipping and the Incoming Polarisation – Animation 1


Cycle skipping and the incoming polarisation animation 2

Cycle Skipping and the Incoming Polarisation – Animation 2


Cycle skipping and the incoming polarisation comments part 1

Cycle Skipping and the Incoming Polarisation – Comments Part 1

  • When the selected point shifts to the other 95% confidence region the particle motion flips and points in the opposite direction.

  • Corrected fast and slow waveforms show what appears to be cycle skipping (matching another peak/trough).

  • Corrected slow waveform flips at the half way point. The codes flip the sign of the slow waveform displacements when a peak is matched to a trough to make the match more obvious.


Cycle skipping and the incoming polarisation comments part 2

Cycle Skipping and the Incoming Polarisation – Comments Part 2

  • p ⊥ component appears to have more energy on it when the minimum is shifted to the other 95% confidence region.

  • The p component after desplitting still has its first peak but the second peak starts to shrink. This waveform can also be seen slowly moving by the delay time.


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