Seismology podcasts

Tom Herring introduces high-precision geodetic measurements using satellite navigation, very-long-baseline interferometry and radar interferometry. He explains how improved accuracy and cheaper receivers expand studies of plate motion, earthquake-related deformation and Earth rotation, with further applications in infrastructure and agriculture.

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.