His theoretical work on the form of seismograms and their application ( e.g. , seismic tomography ) has contributed to the study of the Earth 's mantle , particularly in Australia .
Kennett has made significant contributions to research on the Earth 's internal structure .
Kennett 's theoretical work on the form of seismograms and their application ( e.g. , seismic tomography ) has contributed to the study of Earth Earth 's mantle , particularly in Australia .
Kennett has made significant contributions to research on the Earth 's internal structure .