Seismic imaging

Andreas Fichtner explains progress and obstacles in seismic imaging of Earth at regional and global scales. He discusses the evidence supporting three-dimensional maps of mantle plumes, continental interiors, mid-ocean ridges and large low-shear-velocity structures, and how improved methods increase confidence in the images.

…Field observations, seismic imaging and rock mechanics help reveal the early stages of rifting. Examples connect active rifts with passive continental margins left by earlier breakup.