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.

Folarin Kolawole explains how continental lithosphere breaks apart, from distributed normal faulting to localized extension and eventual ocean-basin formation. 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.