The patterns of resonating waves reveal the Sun’s interior structure and motions
The motions on the surface of the Sun are organized into patterns in both space and time, which reflect those waves which resonate inside the Sun.  Analysis of these patterns (blue means upward, red downward) allows us to infer the structure and motions hidden from direct view. 
The pattern shown – like a certain musical note --corresponds to a certain integral number of wavelengths in latitude, longitude and radial depth.