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

• 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

The next slides contain 3 animated plotsLeft 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 2

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

• 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.