How Well Can We Measure the S/P Velocity Ratio in the LLVPs of the Lower Mantle?

Explore the challenges and methodologies of measuring seismic velocity ratios in Earth's deep interior through this 52-minute conference talk by Jeroen Ritsema from the University of Michigan. Delve into the complexities of determining S-wave to P-wave velocity ratios within Large Low Velocity Provinces (LLVPs) located in the lower mantle, examining the technical limitations and uncertainties inherent in seismic measurements at extreme depths. Learn about current seismological techniques used to probe these enigmatic structures that exist near the core-mantle boundary, and understand the implications of velocity ratio measurements for interpreting the composition and thermal state of these deep Earth features. Gain insights into the ongoing debates surrounding the nature of LLVPs and how improved measurement techniques could advance our understanding of lower mantle dynamics and Earth's internal structure. This presentation was delivered as part of the Workshop on High-Pressure Mineral Physics and Geophysics Applications hosted by ICTP-SAIFR.