Recent Progress in Local Helioseismology

Local helioseismology is a collection of methods for using observations of solar oscillations at the surface to estimate three-dimensional mass flows and variations in wave speed in the solar interior. Michael Thompson contributed to the development of the techniques used to solve inverse problems in local helioseismology. A few selected important targets for current local helioseismic inferences are discussed: Rossby waves and flows around active regions.