Introduction
The supplementary information provided here includes 8 figures and 3 tables. These materials expand on processing, methodology, and results.
Figure S1. Vs search range, model parameterization, and example sensitivity kernels.
Figure S2. Number of interstation phase velocity measurements used at each period for phase velocity tomography.
Figure S3. Chi-squared (𝟀2) misfit maps.
Figure S4. Uncertainty test cases and their BMMC inversion results.
Figure S5. Phase velocity resolution test at 4 s with strongly reduced velocities within the ring fracture of the caldera.
Figure S6. Phase velocity resolution test at 4 s period with alternating positive and negative velocity anomalies surrounded by neutral velocities.
Figure S7. Phase velocity predictions and Vs profiles of the 2,000 best BMMC models for three points across the transect.
Figure S8. Vs as a function of melt fraction over aspect ratios indicative of textural equilibrium, 0.1 to 0.15.
Table S1. List of stations that tipped at some point during deployment.
Table S2. Prior velocity range for each b-spline parameter in BMMC inversion.
Table S3. Weight percent bulk major oxide compositions from Banco Bonito rhyolite flow.